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Differential D27902 Diff 82529 sys/dev/virtio/block/virtio_blk.c

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sys/dev/virtio/block/virtio_blk.c

Show First 20 Lines • Show All 74 Lines • ▼ Show 20 Linesstruct vtblk_softc {
struct mtx vtblk_mtx; struct mtx vtblk_mtx;
uint64_t vtblk_features; uint64_t vtblk_features;
uint32_t vtblk_flags; uint32_t vtblk_flags;
#define VTBLK_FLAG_INDIRECT 0x0001 #define VTBLK_FLAG_INDIRECT 0x0001
#define VTBLK_FLAG_READONLY 0x0002 #define VTBLK_FLAG_READONLY 0x0002
#define VTBLK_FLAG_DETACH 0x0004 #define VTBLK_FLAG_DETACH 0x0004
#define VTBLK_FLAG_SUSPEND 0x0008 #define VTBLK_FLAG_SUSPEND 0x0008
#define VTBLK_FLAG_BARRIER 0x0010 #define VTBLK_FLAG_BARRIER 0x0010
#define VTBLK_FLAG_WC_CONFIG 0x0020 #define VTBLK_FLAG_WCE_CONFIG 0x0020
#define VTBLK_FLAG_DISCARD 0x0040
struct virtqueue *vtblk_vq; struct virtqueue *vtblk_vq;
struct sglist *vtblk_sglist; struct sglist *vtblk_sglist;
struct disk *vtblk_disk; struct disk *vtblk_disk;
struct bio_queue_head vtblk_bioq; struct bio_queue_head vtblk_bioq;
TAILQ_HEAD(, vtblk_request) TAILQ_HEAD(, vtblk_request)
vtblk_req_free; vtblk_req_free;
Show All 12 Lines
static struct virtio_feature_desc vtblk_feature_desc[] = { static struct virtio_feature_desc vtblk_feature_desc[] = {
{ VIRTIO_BLK_F_BARRIER, "HostBarrier" }, { VIRTIO_BLK_F_BARRIER, "HostBarrier" },
{ VIRTIO_BLK_F_SIZE_MAX, "MaxSegSize" }, { VIRTIO_BLK_F_SIZE_MAX, "MaxSegSize" },
{ VIRTIO_BLK_F_SEG_MAX, "MaxNumSegs" }, { VIRTIO_BLK_F_SEG_MAX, "MaxNumSegs" },
{ VIRTIO_BLK_F_GEOMETRY, "DiskGeometry" }, { VIRTIO_BLK_F_GEOMETRY, "DiskGeometry" },
{ VIRTIO_BLK_F_RO, "ReadOnly" }, { VIRTIO_BLK_F_RO, "ReadOnly" },
{ VIRTIO_BLK_F_BLK_SIZE, "BlockSize" }, { VIRTIO_BLK_F_BLK_SIZE, "BlockSize" },
{ VIRTIO_BLK_F_SCSI, "SCSICmds" }, { VIRTIO_BLK_F_SCSI, "SCSICmds" },
{ VIRTIO_BLK_F_WCE, "WriteCache" }, { VIRTIO_BLK_F_FLUSH, "FlushCmd" },
{ VIRTIO_BLK_F_TOPOLOGY, "Topology" }, { VIRTIO_BLK_F_TOPOLOGY, "Topology" },
{ VIRTIO_BLK_F_CONFIG_WCE, "ConfigWCE" }, { VIRTIO_BLK_F_CONFIG_WCE, "ConfigWCE" },
{ VIRTIO_BLK_F_MQ, "Multiqueue" },
{ VIRTIO_BLK_F_DISCARD, "Discard" }, { VIRTIO_BLK_F_DISCARD, "Discard" },
{ VIRTIO_BLK_F_WRITE_ZEROES, "WriteZeros" },
{ 0, NULL } { 0, NULL }
}; };
static int vtblk_modevent(module_t, int, void *); static int vtblk_modevent(module_t, int, void *);
static int vtblk_probe(device_t); static int vtblk_probe(device_t);
static int vtblk_attach(device_t); static int vtblk_attach(device_t);
static int vtblk_detach(device_t); static int vtblk_detach(device_t);
▲ Show 20 Lines • Show All 64 Lines • ▼ Show 20 Lines
static void vtblk_set_write_cache(struct vtblk_softc *, int); static void vtblk_set_write_cache(struct vtblk_softc *, int);
static int vtblk_write_cache_enabled(struct vtblk_softc *sc, static int vtblk_write_cache_enabled(struct vtblk_softc *sc,
struct virtio_blk_config *); struct virtio_blk_config *);
static int vtblk_write_cache_sysctl(SYSCTL_HANDLER_ARGS); static int vtblk_write_cache_sysctl(SYSCTL_HANDLER_ARGS);
static void vtblk_setup_sysctl(struct vtblk_softc *); static void vtblk_setup_sysctl(struct vtblk_softc *);
static int vtblk_tunable_int(struct vtblk_softc *, const char *, int); static int vtblk_tunable_int(struct vtblk_softc *, const char *, int);
#define vtblk_modern(_sc) (((_sc)->vtblk_features & VIRTIO_F_VERSION_1) != 0)
#define vtblk_htog16(_sc, _val) virtio_htog16(vtblk_modern(_sc), _val)
#define vtblk_htog32(_sc, _val) virtio_htog32(vtblk_modern(_sc), _val)
#define vtblk_htog64(_sc, _val) virtio_htog64(vtblk_modern(_sc), _val)
#define vtblk_gtoh16(_sc, _val) virtio_gtoh16(vtblk_modern(_sc), _val)
#define vtblk_gtoh32(_sc, _val) virtio_gtoh32(vtblk_modern(_sc), _val)
#define vtblk_gtoh64(_sc, _val) virtio_gtoh64(vtblk_modern(_sc), _val)
/* Tunables. */ /* Tunables. */
static int vtblk_no_ident = 0; static int vtblk_no_ident = 0;
TUNABLE_INT("hw.vtblk.no_ident", &vtblk_no_ident); TUNABLE_INT("hw.vtblk.no_ident", &vtblk_no_ident);
static int vtblk_writecache_mode = -1; static int vtblk_writecache_mode = -1;
TUNABLE_INT("hw.vtblk.writecache_mode", &vtblk_writecache_mode); TUNABLE_INT("hw.vtblk.writecache_mode", &vtblk_writecache_mode);
/* Features desired/implemented by this driver. */ #define VTBLK_COMMON_FEATURES \
#define VTBLK_FEATURES \ (VIRTIO_BLK_F_SIZE_MAX | \
(VIRTIO_BLK_F_BARRIER | \
VIRTIO_BLK_F_SIZE_MAX | \
VIRTIO_BLK_F_SEG_MAX | \ VIRTIO_BLK_F_SEG_MAX | \
VIRTIO_BLK_F_GEOMETRY | \ VIRTIO_BLK_F_GEOMETRY | \
VIRTIO_BLK_F_RO | \ VIRTIO_BLK_F_RO | \
VIRTIO_BLK_F_BLK_SIZE | \ VIRTIO_BLK_F_BLK_SIZE | \
VIRTIO_BLK_F_WCE | \ VIRTIO_BLK_F_FLUSH | \
VIRTIO_BLK_F_TOPOLOGY | \ VIRTIO_BLK_F_TOPOLOGY | \
VIRTIO_BLK_F_CONFIG_WCE | \ VIRTIO_BLK_F_CONFIG_WCE | \
VIRTIO_BLK_F_DISCARD | \ VIRTIO_BLK_F_DISCARD | \
VIRTIO_RING_F_INDIRECT_DESC) VIRTIO_RING_F_INDIRECT_DESC)
#define VTBLK_MODERN_FEATURES (VTBLK_COMMON_FEATURES)
#define VTBLK_LEGACY_FEATURES (VIRTIO_BLK_F_BARRIER | VTBLK_COMMON_FEATURES)
#define VTBLK_MTX(_sc) &(_sc)->vtblk_mtx #define VTBLK_MTX(_sc) &(_sc)->vtblk_mtx
#define VTBLK_LOCK_INIT(_sc, _name) \ #define VTBLK_LOCK_INIT(_sc, _name) \
mtx_init(VTBLK_MTX((_sc)), (_name), \ mtx_init(VTBLK_MTX((_sc)), (_name), \
"VirtIO Block Lock", MTX_DEF) "VirtIO Block Lock", MTX_DEF)
#define VTBLK_LOCK(_sc) mtx_lock(VTBLK_MTX((_sc))) #define VTBLK_LOCK(_sc) mtx_lock(VTBLK_MTX((_sc)))
#define VTBLK_UNLOCK(_sc) mtx_unlock(VTBLK_MTX((_sc))) #define VTBLK_UNLOCK(_sc) mtx_unlock(VTBLK_MTX((_sc)))
#define VTBLK_LOCK_DESTROY(_sc) mtx_destroy(VTBLK_MTX((_sc))) #define VTBLK_LOCK_DESTROY(_sc) mtx_destroy(VTBLK_MTX((_sc)))
#define VTBLK_LOCK_ASSERT(_sc) mtx_assert(VTBLK_MTX((_sc)), MA_OWNED) #define VTBLK_LOCK_ASSERT(_sc) mtx_assert(VTBLK_MTX((_sc)), MA_OWNED)
#define VTBLK_LOCK_ASSERT_NOTOWNED(_sc) \ #define VTBLK_LOCK_ASSERT_NOTOWNED(_sc) \
mtx_assert(VTBLK_MTX((_sc)), MA_NOTOWNED) mtx_assert(VTBLK_MTX((_sc)), MA_NOTOWNED)
#define VTBLK_DISK_NAME "vtbd" #define VTBLK_DISK_NAME "vtbd"
#define VTBLK_QUIESCE_TIMEOUT (30 * hz) #define VTBLK_QUIESCE_TIMEOUT (30 * hz)
#define VTBLK_BSIZE 512
/* /*
* Each block request uses at least two segments - one for the header * Each block request uses at least two segments - one for the header
* and one for the status. * and one for the status.
*/ */
#define VTBLK_MIN_SEGMENTS 2 #define VTBLK_MIN_SEGMENTS 2
static device_method_t vtblk_methods[] = { static device_method_t vtblk_methods[] = {
▲ Show 20 Lines • Show All 322 Lines • ▼ Show 20 Linesvtblk_strategy(struct bio *bp)
VTBLK_LOCK(sc); VTBLK_LOCK(sc);
if (sc->vtblk_flags & VTBLK_FLAG_DETACH) { if (sc->vtblk_flags & VTBLK_FLAG_DETACH) {
VTBLK_UNLOCK(sc); VTBLK_UNLOCK(sc);
vtblk_bio_done(sc, bp, ENXIO); vtblk_bio_done(sc, bp, ENXIO);
return; return;
} }
if ((bp->bio_cmd == BIO_DELETE) &&
!(sc->vtblk_flags & VTBLK_FLAG_DISCARD)) {
VTBLK_UNLOCK(sc);
vtblk_bio_done(sc, bp, EOPNOTSUPP);
return;
}
bioq_insert_tail(&sc->vtblk_bioq, bp); bioq_insert_tail(&sc->vtblk_bioq, bp);
grehanUnsubmitted
Done
Inline Actions

Was the deleted code block a no-op ? (guessing there won't be DELETE bio's if the DISKFLAG_CANDELETE wasn't set)

grehan: Was the deleted code block a no-op ? (guessing there won't be DELETE bio's if the…
bryanvAuthorUnsubmitted
Done
Inline Actions

Yes. geom_disk already checks for DISKFLAG_CANDELETE before send down the BIO

bryanv: Yes. geom_disk already checks for DISKFLAG_CANDELETE before send down the BIO
vtblk_startio(sc); vtblk_startio(sc);
VTBLK_UNLOCK(sc); VTBLK_UNLOCK(sc);
} }
static void static void
vtblk_negotiate_features(struct vtblk_softc *sc) vtblk_negotiate_features(struct vtblk_softc *sc)
{ {
device_t dev; device_t dev;
uint64_t features; uint64_t features;
dev = sc->vtblk_dev; dev = sc->vtblk_dev;
features = VTBLK_FEATURES; features = virtio_bus_is_modern(dev) ? VTBLK_MODERN_FEATURES :
VTBLK_LEGACY_FEATURES;
sc->vtblk_features = virtio_negotiate_features(dev, features); sc->vtblk_features = virtio_negotiate_features(dev, features);
virtio_finalize_features(dev);
} }
static void static void
vtblk_setup_features(struct vtblk_softc *sc) vtblk_setup_features(struct vtblk_softc *sc)
{ {
device_t dev; device_t dev;
dev = sc->vtblk_dev; dev = sc->vtblk_dev;
vtblk_negotiate_features(sc); vtblk_negotiate_features(sc);
if (virtio_with_feature(dev, VIRTIO_RING_F_INDIRECT_DESC)) if (virtio_with_feature(dev, VIRTIO_RING_F_INDIRECT_DESC))
sc->vtblk_flags |= VTBLK_FLAG_INDIRECT; sc->vtblk_flags |= VTBLK_FLAG_INDIRECT;
if (virtio_with_feature(dev, VIRTIO_BLK_F_RO)) if (virtio_with_feature(dev, VIRTIO_BLK_F_RO))
sc->vtblk_flags |= VTBLK_FLAG_READONLY; sc->vtblk_flags |= VTBLK_FLAG_READONLY;
if (virtio_with_feature(dev, VIRTIO_BLK_F_CONFIG_WCE))
sc->vtblk_flags |= VTBLK_FLAG_WCE_CONFIG;
/* Legacy. */
if (virtio_with_feature(dev, VIRTIO_BLK_F_BARRIER)) if (virtio_with_feature(dev, VIRTIO_BLK_F_BARRIER))
sc->vtblk_flags |= VTBLK_FLAG_BARRIER; sc->vtblk_flags |= VTBLK_FLAG_BARRIER;
if (virtio_with_feature(dev, VIRTIO_BLK_F_CONFIG_WCE))
sc->vtblk_flags |= VTBLK_FLAG_WC_CONFIG;
if (virtio_with_feature(dev, VIRTIO_BLK_F_DISCARD))
sc->vtblk_flags |= VTBLK_FLAG_DISCARD;
} }
static int static int
vtblk_maximum_segments(struct vtblk_softc *sc, vtblk_maximum_segments(struct vtblk_softc *sc,
struct virtio_blk_config *blkcfg) struct virtio_blk_config *blkcfg)
{ {
device_t dev; device_t dev;
int nsegs; int nsegs;
▲ Show 20 Lines • Show All 62 Lines • ▼ Show 20 Linesvtblk_alloc_disk(struct vtblk_softc *sc, struct virtio_blk_config *blkcfg)
sc->vtblk_disk = dp = disk_alloc(); sc->vtblk_disk = dp = disk_alloc();
dp->d_open = vtblk_open; dp->d_open = vtblk_open;
dp->d_close = vtblk_close; dp->d_close = vtblk_close;
dp->d_ioctl = vtblk_ioctl; dp->d_ioctl = vtblk_ioctl;
dp->d_strategy = vtblk_strategy; dp->d_strategy = vtblk_strategy;
dp->d_name = VTBLK_DISK_NAME; dp->d_name = VTBLK_DISK_NAME;
dp->d_unit = device_get_unit(dev); dp->d_unit = device_get_unit(dev);
dp->d_drv1 = sc; dp->d_drv1 = sc;
dp->d_flags = DISKFLAG_CANFLUSHCACHE | DISKFLAG_UNMAPPED_BIO | dp->d_flags = DISKFLAG_UNMAPPED_BIO | DISKFLAG_DIRECT_COMPLETION;
DISKFLAG_DIRECT_COMPLETION;
dp->d_hba_vendor = virtio_get_vendor(dev); dp->d_hba_vendor = virtio_get_vendor(dev);
dp->d_hba_device = virtio_get_device(dev); dp->d_hba_device = virtio_get_device(dev);
dp->d_hba_subvendor = virtio_get_subvendor(dev); dp->d_hba_subvendor = virtio_get_subvendor(dev);
dp->d_hba_subdevice = virtio_get_subdevice(dev); dp->d_hba_subdevice = virtio_get_subdevice(dev);
if (virtio_with_feature(dev, VIRTIO_BLK_F_FLUSH))
dp->d_flags |= DISKFLAG_CANFLUSHCACHE;
if ((sc->vtblk_flags & VTBLK_FLAG_READONLY) == 0) if ((sc->vtblk_flags & VTBLK_FLAG_READONLY) == 0)
dp->d_dump = vtblk_dump; dp->d_dump = vtblk_dump;
/* Capacity is always in 512-byte units. */ /* Capacity is always in 512-byte units. */
dp->d_mediasize = blkcfg->capacity * VTBLK_BSIZE; dp->d_mediasize = blkcfg->capacity * VTBLK_BSIZE;
if (virtio_with_feature(dev, VIRTIO_BLK_F_BLK_SIZE)) if (virtio_with_feature(dev, VIRTIO_BLK_F_BLK_SIZE))
dp->d_sectorsize = blkcfg->blk_size; dp->d_sectorsize = blkcfg->blk_size;
▲ Show 20 Lines • Show All 174 Lines • ▼ Show 20 Linesvtblk_request_bio(struct vtblk_softc *sc)
req = vtblk_request_dequeue(sc); req = vtblk_request_dequeue(sc);
if (req == NULL) if (req == NULL)
return (NULL); return (NULL);
bp = bioq_takefirst(bioq); bp = bioq_takefirst(bioq);
req->vbr_bp = bp; req->vbr_bp = bp;
req->vbr_ack = -1; req->vbr_ack = -1;
req->vbr_hdr.ioprio = 1; req->vbr_hdr.ioprio = vtblk_gtoh32(sc, 1);
switch (bp->bio_cmd) { switch (bp->bio_cmd) {
case BIO_FLUSH: case BIO_FLUSH:
req->vbr_hdr.type = VIRTIO_BLK_T_FLUSH; req->vbr_hdr.type = vtblk_gtoh32(sc, VIRTIO_BLK_T_FLUSH);
req->vbr_hdr.sector = 0;
break; break;
case BIO_READ: case BIO_READ:
req->vbr_hdr.type = VIRTIO_BLK_T_IN; req->vbr_hdr.type = vtblk_gtoh32(sc, VIRTIO_BLK_T_IN);
req->vbr_hdr.sector = bp->bio_offset / VTBLK_BSIZE; req->vbr_hdr.sector = vtblk_gtoh64(sc, bp->bio_offset / VTBLK_BSIZE);
break; break;
case BIO_WRITE: case BIO_WRITE:
req->vbr_hdr.type = VIRTIO_BLK_T_OUT; req->vbr_hdr.type = vtblk_gtoh32(sc, VIRTIO_BLK_T_OUT);
req->vbr_hdr.sector = bp->bio_offset / VTBLK_BSIZE; req->vbr_hdr.sector = vtblk_gtoh64(sc, bp->bio_offset / VTBLK_BSIZE);
break; break;
case BIO_DELETE: case BIO_DELETE:
req->vbr_hdr.type = VIRTIO_BLK_T_DISCARD; req->vbr_hdr.type = vtblk_gtoh32(sc, VIRTIO_BLK_T_DISCARD);
req->vbr_hdr.sector = bp->bio_offset / VTBLK_BSIZE; req->vbr_hdr.sector = vtblk_gtoh64(sc, bp->bio_offset / VTBLK_BSIZE);
break; break;
default: default:
panic("%s: bio with unhandled cmd: %d", __func__, bp->bio_cmd); panic("%s: bio with unhandled cmd: %d", __func__, bp->bio_cmd);
} }
if (bp->bio_flags & BIO_ORDERED) if (bp->bio_flags & BIO_ORDERED)
req->vbr_hdr.type |= VIRTIO_BLK_T_BARRIER; req->vbr_hdr.type |= vtblk_gtoh32(sc, VIRTIO_BLK_T_BARRIER);
return (req); return (req);
} }
static int static int
vtblk_request_execute(struct vtblk_softc *sc, struct vtblk_request *req) vtblk_request_execute(struct vtblk_softc *sc, struct vtblk_request *req)
{ {
struct virtqueue *vq; struct virtqueue *vq;
Show All 14 Linesvtblk_request_execute(struct vtblk_softc *sc, struct vtblk_request *req)
*/ */
if ((sc->vtblk_flags & VTBLK_FLAG_BARRIER) == 0) { if ((sc->vtblk_flags & VTBLK_FLAG_BARRIER) == 0) {
if (sc->vtblk_req_ordered != NULL) if (sc->vtblk_req_ordered != NULL)
return (EBUSY); return (EBUSY);
if (bp->bio_flags & BIO_ORDERED) { if (bp->bio_flags & BIO_ORDERED) {
if (!virtqueue_empty(vq)) if (!virtqueue_empty(vq))
return (EBUSY); return (EBUSY);
ordered = 1; ordered = 1;
req->vbr_hdr.type &= ~VIRTIO_BLK_T_BARRIER; req->vbr_hdr.type &= vtblk_gtoh32(sc,
~VIRTIO_BLK_T_BARRIER);
} }
} }
sglist_reset(sg); sglist_reset(sg);
sglist_append(sg, &req->vbr_hdr, sizeof(struct virtio_blk_outhdr)); sglist_append(sg, &req->vbr_hdr, sizeof(struct virtio_blk_outhdr));
if (bp->bio_cmd == BIO_READ || bp->bio_cmd == BIO_WRITE) { if (bp->bio_cmd == BIO_READ || bp->bio_cmd == BIO_WRITE) {
error = sglist_append_bio(sg, bp); error = sglist_append_bio(sg, bp);
if (error || sg->sg_nseg == sg->sg_maxseg) { if (error || sg->sg_nseg == sg->sg_maxseg) {
panic("%s: bio %p data buffer too big %d", panic("%s: bio %p data buffer too big %d",
__func__, bp, error); __func__, bp, error);
} }
/* BIO_READ means the host writes into our buffer. */ /* BIO_READ means the host writes into our buffer. */
if (bp->bio_cmd == BIO_READ) if (bp->bio_cmd == BIO_READ)
writable = sg->sg_nseg - 1; writable = sg->sg_nseg - 1;
} else if (bp->bio_cmd == BIO_DELETE) { } else if (bp->bio_cmd == BIO_DELETE) {
struct virtio_blk_discard_write_zeroes *discard; struct virtio_blk_discard_write_zeroes *discard;
discard = malloc(sizeof(*discard), M_DEVBUF, M_NOWAIT | M_ZERO); discard = malloc(sizeof(*discard), M_DEVBUF, M_NOWAIT | M_ZERO);
if (discard == NULL) if (discard == NULL)
return (ENOMEM); return (ENOMEM);
discard->sector = bp->bio_offset / VTBLK_BSIZE;
discard->num_sectors = bp->bio_bcount / VTBLK_BSIZE;
bp->bio_driver1 = discard; bp->bio_driver1 = discard;
discard->sector = vtblk_gtoh64(sc, bp->bio_offset / VTBLK_BSIZE);
discard->num_sectors = vtblk_gtoh32(sc, bp->bio_bcount / VTBLK_BSIZE);
error = sglist_append(sg, discard, sizeof(*discard)); error = sglist_append(sg, discard, sizeof(*discard));
if (error || sg->sg_nseg == sg->sg_maxseg) { if (error || sg->sg_nseg == sg->sg_maxseg) {
panic("%s: bio %p data buffer too big %d", panic("%s: bio %p data buffer too big %d",
__func__, bp, error); __func__, bp, error);
} }
} }
writable++; writable++;
▲ Show 20 Lines • Show All 76 Lines • ▼ Show 20 Linesvtblk_drain_vq(struct vtblk_softc *sc)
sc->vtblk_req_ordered = NULL; sc->vtblk_req_ordered = NULL;
KASSERT(virtqueue_empty(vq), ("virtqueue not empty")); KASSERT(virtqueue_empty(vq), ("virtqueue not empty"));
} }
static void static void
vtblk_drain(struct vtblk_softc *sc) vtblk_drain(struct vtblk_softc *sc)
{ {
struct bio_queue queue;
struct bio_queue_head *bioq; struct bio_queue_head *bioq;
struct vtblk_request *req; struct vtblk_request *req;
struct bio *bp; struct bio *bp;
bioq = &sc->vtblk_bioq; bioq = &sc->vtblk_bioq;
TAILQ_INIT(&queue);
if (sc->vtblk_vq != NULL) { if (sc->vtblk_vq != NULL) {
struct bio_queue queue;
TAILQ_INIT(&queue);
vtblk_queue_completed(sc, &queue); vtblk_queue_completed(sc, &queue);
vtblk_done_completed(sc, &queue); vtblk_done_completed(sc, &queue);
vtblk_drain_vq(sc); vtblk_drain_vq(sc);
} }
while ((req = vtblk_request_next_ready(sc)) != NULL) { while ((req = vtblk_request_next_ready(sc)) != NULL) {
vtblk_bio_done(sc, req->vbr_bp, ENXIO); vtblk_bio_done(sc, req->vbr_bp, ENXIO);
▲ Show 20 Lines • Show All 79 Lines • ▼ Show 20 Linesvtblk_read_config(struct vtblk_softc *sc, struct virtio_blk_config *blkcfg)
/* The capacity is always available. */ /* The capacity is always available. */
virtio_read_device_config(dev, offsetof(struct virtio_blk_config, virtio_read_device_config(dev, offsetof(struct virtio_blk_config,
capacity), &blkcfg->capacity, sizeof(blkcfg->capacity)); capacity), &blkcfg->capacity, sizeof(blkcfg->capacity));
/* Read the configuration if the feature was negotiated. */ /* Read the configuration if the feature was negotiated. */
VTBLK_GET_CONFIG(dev, VIRTIO_BLK_F_SIZE_MAX, size_max, blkcfg); VTBLK_GET_CONFIG(dev, VIRTIO_BLK_F_SIZE_MAX, size_max, blkcfg);
VTBLK_GET_CONFIG(dev, VIRTIO_BLK_F_SEG_MAX, seg_max, blkcfg); VTBLK_GET_CONFIG(dev, VIRTIO_BLK_F_SEG_MAX, seg_max, blkcfg);
VTBLK_GET_CONFIG(dev, VIRTIO_BLK_F_GEOMETRY, geometry, blkcfg); VTBLK_GET_CONFIG(dev, VIRTIO_BLK_F_GEOMETRY,
geometry.cylinders, blkcfg);
VTBLK_GET_CONFIG(dev, VIRTIO_BLK_F_GEOMETRY,
geometry.heads, blkcfg);
VTBLK_GET_CONFIG(dev, VIRTIO_BLK_F_GEOMETRY,
geometry.sectors, blkcfg);
VTBLK_GET_CONFIG(dev, VIRTIO_BLK_F_BLK_SIZE, blk_size, blkcfg); VTBLK_GET_CONFIG(dev, VIRTIO_BLK_F_BLK_SIZE, blk_size, blkcfg);
VTBLK_GET_CONFIG(dev, VIRTIO_BLK_F_TOPOLOGY, topology, blkcfg); VTBLK_GET_CONFIG(dev, VIRTIO_BLK_F_TOPOLOGY,
topology.physical_block_exp, blkcfg);
VTBLK_GET_CONFIG(dev, VIRTIO_BLK_F_TOPOLOGY,
topology.alignment_offset, blkcfg);
VTBLK_GET_CONFIG(dev, VIRTIO_BLK_F_TOPOLOGY,
topology.min_io_size, blkcfg);
VTBLK_GET_CONFIG(dev, VIRTIO_BLK_F_TOPOLOGY,
topology.opt_io_size, blkcfg);
VTBLK_GET_CONFIG(dev, VIRTIO_BLK_F_CONFIG_WCE, wce, blkcfg); VTBLK_GET_CONFIG(dev, VIRTIO_BLK_F_CONFIG_WCE, wce, blkcfg);
VTBLK_GET_CONFIG(dev, VIRTIO_BLK_F_DISCARD, max_discard_sectors, VTBLK_GET_CONFIG(dev, VIRTIO_BLK_F_DISCARD, max_discard_sectors,
blkcfg); blkcfg);
VTBLK_GET_CONFIG(dev, VIRTIO_BLK_F_DISCARD, max_discard_seg, blkcfg); VTBLK_GET_CONFIG(dev, VIRTIO_BLK_F_DISCARD, max_discard_seg, blkcfg);
VTBLK_GET_CONFIG(dev, VIRTIO_BLK_F_DISCARD, discard_sector_alignment, VTBLK_GET_CONFIG(dev, VIRTIO_BLK_F_DISCARD, discard_sector_alignment,
blkcfg); blkcfg);
} }
Show All 13 Linesvtblk_ident(struct vtblk_softc *sc)
if (vtblk_tunable_int(sc, "no_ident", vtblk_no_ident) != 0) if (vtblk_tunable_int(sc, "no_ident", vtblk_no_ident) != 0)
return; return;
req = vtblk_request_dequeue(sc); req = vtblk_request_dequeue(sc);
if (req == NULL) if (req == NULL)
return; return;
req->vbr_ack = -1; req->vbr_ack = -1;
req->vbr_hdr.type = VIRTIO_BLK_T_GET_ID; req->vbr_hdr.type = vtblk_gtoh32(sc, VIRTIO_BLK_T_GET_ID);
req->vbr_hdr.ioprio = 1; req->vbr_hdr.ioprio = vtblk_gtoh32(sc, 1);
req->vbr_hdr.sector = 0; req->vbr_hdr.sector = 0;
req->vbr_bp = &buf; req->vbr_bp = &buf;
g_reset_bio(&buf); g_reset_bio(&buf);
buf.bio_cmd = BIO_READ; buf.bio_cmd = BIO_READ;
buf.bio_data = dp->d_ident; buf.bio_data = dp->d_ident;
buf.bio_bcount = len; buf.bio_bcount = len;
▲ Show 20 Lines • Show All 114 Lines • ▼ Show 20 Lines
vtblk_dump_write(struct vtblk_softc *sc, void *virtual, off_t offset, vtblk_dump_write(struct vtblk_softc *sc, void *virtual, off_t offset,
size_t length) size_t length)
{ {
struct bio buf; struct bio buf;
struct vtblk_request *req; struct vtblk_request *req;
req = &sc->vtblk_dump_request; req = &sc->vtblk_dump_request;
req->vbr_ack = -1; req->vbr_ack = -1;
req->vbr_hdr.type = VIRTIO_BLK_T_OUT; req->vbr_hdr.type = vtblk_gtoh32(sc, VIRTIO_BLK_T_OUT);
req->vbr_hdr.ioprio = 1; req->vbr_hdr.ioprio = vtblk_gtoh32(sc, 1);
req->vbr_hdr.sector = offset / VTBLK_BSIZE; req->vbr_hdr.sector = vtblk_gtoh64(sc, offset / VTBLK_BSIZE);
req->vbr_bp = &buf; req->vbr_bp = &buf;
g_reset_bio(&buf); g_reset_bio(&buf);
buf.bio_cmd = BIO_WRITE; buf.bio_cmd = BIO_WRITE;
buf.bio_data = virtual; buf.bio_data = virtual;
buf.bio_bcount = length; buf.bio_bcount = length;
return (vtblk_poll_request(sc, req)); return (vtblk_poll_request(sc, req));
} }
static int static int
vtblk_dump_flush(struct vtblk_softc *sc) vtblk_dump_flush(struct vtblk_softc *sc)
{ {
struct bio buf; struct bio buf;
struct vtblk_request *req; struct vtblk_request *req;
req = &sc->vtblk_dump_request; req = &sc->vtblk_dump_request;
req->vbr_ack = -1; req->vbr_ack = -1;
req->vbr_hdr.type = VIRTIO_BLK_T_FLUSH; req->vbr_hdr.type = vtblk_gtoh32(sc, VIRTIO_BLK_T_FLUSH);
req->vbr_hdr.ioprio = 1; req->vbr_hdr.ioprio = vtblk_gtoh32(sc, 1);
req->vbr_hdr.sector = 0; req->vbr_hdr.sector = 0;
req->vbr_bp = &buf; req->vbr_bp = &buf;
g_reset_bio(&buf); g_reset_bio(&buf);
buf.bio_cmd = BIO_FLUSH; buf.bio_cmd = BIO_FLUSH;
return (vtblk_poll_request(sc, req)); return (vtblk_poll_request(sc, req));
Show All 20 Lines
} }
static int static int
vtblk_write_cache_enabled(struct vtblk_softc *sc, vtblk_write_cache_enabled(struct vtblk_softc *sc,
struct virtio_blk_config *blkcfg) struct virtio_blk_config *blkcfg)
{ {
int wc; int wc;
if (sc->vtblk_flags & VTBLK_FLAG_WC_CONFIG) { if (sc->vtblk_flags & VTBLK_FLAG_WCE_CONFIG) {
wc = vtblk_tunable_int(sc, "writecache_mode", wc = vtblk_tunable_int(sc, "writecache_mode",
vtblk_writecache_mode); vtblk_writecache_mode);
if (wc >= 0 && wc < VTBLK_CACHE_MAX) if (wc >= 0 && wc < VTBLK_CACHE_MAX)
vtblk_set_write_cache(sc, wc); vtblk_set_write_cache(sc, wc);
else else
wc = blkcfg->wce; wc = blkcfg->wce;
} else } else
wc = virtio_with_feature(sc->vtblk_dev, VIRTIO_BLK_F_WCE); wc = virtio_with_feature(sc->vtblk_dev, VIRTIO_BLK_F_FLUSH);
return (wc); return (wc);
} }
static int static int
vtblk_write_cache_sysctl(SYSCTL_HANDLER_ARGS) vtblk_write_cache_sysctl(SYSCTL_HANDLER_ARGS)
{ {
struct vtblk_softc *sc; struct vtblk_softc *sc;
int wc, error; int wc, error;
sc = oidp->oid_arg1; sc = oidp->oid_arg1;
wc = sc->vtblk_write_cache; wc = sc->vtblk_write_cache;
error = sysctl_handle_int(oidp, &wc, 0, req); error = sysctl_handle_int(oidp, &wc, 0, req);
if (error || req->newptr == NULL) if (error || req->newptr == NULL)
return (error); return (error);
if ((sc->vtblk_flags & VTBLK_FLAG_WC_CONFIG) == 0) if ((sc->vtblk_flags & VTBLK_FLAG_WCE_CONFIG) == 0)
return (EPERM); return (EPERM);
if (wc < 0 || wc >= VTBLK_CACHE_MAX) if (wc < 0 || wc >= VTBLK_CACHE_MAX)
return (EINVAL); return (EINVAL);
VTBLK_LOCK(sc); VTBLK_LOCK(sc);
sc->vtblk_write_cache = wc; sc->vtblk_write_cache = wc;
vtblk_set_write_cache(sc, sc->vtblk_write_cache); vtblk_set_write_cache(sc, sc->vtblk_write_cache);
VTBLK_UNLOCK(sc); VTBLK_UNLOCK(sc);
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