#define SECTOR_BITS 9
#define SECTOR_SIZE (1 << SECTOR_BITS)
+static AIOPool vectored_aio_pool;
+
typedef struct BlockDriverAIOCBSync {
BlockDriverAIOCB common;
QEMUBH *bh;
bdrv->bdrv_read = bdrv_read_em;
bdrv->bdrv_write = bdrv_write_em;
}
+ aio_pool_init(&bdrv->aio_pool, bdrv->aiocb_size, bdrv->bdrv_aio_cancel);
bdrv->next = first_drv;
first_drv = bdrv;
}
bs->read_only = 0;
bs->is_temporary = 0;
bs->encrypted = 0;
+ bs->valid_key = 0;
if (flags & BDRV_O_SNAPSHOT) {
BlockDriverState *bs1;
len = bdrv_getlength(bs);
- if ((offset + size) > len)
+ if (offset < 0)
+ return -EIO;
+
+ if ((offset > len) || (len - offset < size))
return -EIO;
return 0;
return bs->encrypted;
}
+int bdrv_key_required(BlockDriverState *bs)
+{
+ BlockDriverState *backing_hd = bs->backing_hd;
+
+ if (backing_hd && backing_hd->encrypted && !backing_hd->valid_key)
+ return 1;
+ return (bs->encrypted && !bs->valid_key);
+}
+
int bdrv_set_key(BlockDriverState *bs, const char *key)
{
int ret;
}
if (!bs->encrypted || !bs->drv || !bs->drv->bdrv_set_key)
return -1;
- return bs->drv->bdrv_set_key(bs, key);
+ ret = bs->drv->bdrv_set_key(bs, key);
+ bs->valid_key = (ret == 0);
+ return ret;
}
void bdrv_get_format(BlockDriverState *bs, char *buf, int buf_size)
void bdrv_info_stats (void)
{
BlockDriverState *bs;
- BlockDriverInfo bdi;
for (bs = bdrv_first; bs != NULL; bs = bs->next) {
term_printf ("%s:"
" wr_bytes=%" PRIu64
" rd_operations=%" PRIu64
" wr_operations=%" PRIu64
- ,
+ "\n",
bs->device_name,
bs->rd_bytes, bs->wr_bytes,
bs->rd_ops, bs->wr_ops);
- if (bdrv_get_info(bs, &bdi) == 0)
- term_printf(" high=%" PRId64
- " bytes_free=%" PRId64,
- bdi.highest_alloc, bdi.num_free_bytes);
- term_printf("\n");
}
}
return -ENOMEDIUM;
if (!drv->bdrv_write_compressed)
return -ENOTSUP;
+ if (bdrv_check_request(bs, sector_num, nb_sectors))
+ return -EIO;
return drv->bdrv_write_compressed(bs, sector_num, buf, nb_sectors);
}
return drv->bdrv_get_info(bs, bdi);
}
+int bdrv_put_buffer(BlockDriverState *bs, const uint8_t *buf, int64_t pos, int size)
+{
+ BlockDriver *drv = bs->drv;
+ if (!drv)
+ return -ENOMEDIUM;
+ if (!drv->bdrv_put_buffer)
+ return -ENOTSUP;
+ return drv->bdrv_put_buffer(bs, buf, pos, size);
+}
+
+int bdrv_get_buffer(BlockDriverState *bs, uint8_t *buf, int64_t pos, int size)
+{
+ BlockDriver *drv = bs->drv;
+ if (!drv)
+ return -ENOMEDIUM;
+ if (!drv->bdrv_get_buffer)
+ return -ENOTSUP;
+ return drv->bdrv_get_buffer(bs, buf, pos, size);
+}
+
/**************************************************************/
/* handling of snapshots */
/**************************************************************/
/* async I/Os */
-typedef struct VectorTranslationState {
+typedef struct VectorTranslationAIOCB {
+ BlockDriverAIOCB common;
QEMUIOVector *iov;
uint8_t *bounce;
int is_write;
BlockDriverAIOCB *aiocb;
- BlockDriverAIOCB *this_aiocb;
-} VectorTranslationState;
+} VectorTranslationAIOCB;
+
+static void bdrv_aio_cancel_vector(BlockDriverAIOCB *_acb)
+{
+ VectorTranslationAIOCB *acb
+ = container_of(_acb, VectorTranslationAIOCB, common);
+
+ bdrv_aio_cancel(acb->aiocb);
+}
static void bdrv_aio_rw_vector_cb(void *opaque, int ret)
{
- VectorTranslationState *s = opaque;
+ VectorTranslationAIOCB *s = (VectorTranslationAIOCB *)opaque;
if (!s->is_write) {
qemu_iovec_from_buffer(s->iov, s->bounce, s->iov->size);
}
qemu_vfree(s->bounce);
- s->this_aiocb->cb(s->this_aiocb->opaque, ret);
- qemu_aio_release(s->this_aiocb);
+ s->common.cb(s->common.opaque, ret);
+ qemu_aio_release(s);
}
static BlockDriverAIOCB *bdrv_aio_rw_vector(BlockDriverState *bs,
int is_write)
{
- VectorTranslationState *s = qemu_mallocz(sizeof(*s));
- BlockDriverAIOCB *aiocb = qemu_aio_get(bs, cb, opaque);
+ VectorTranslationAIOCB *s = qemu_aio_get_pool(&vectored_aio_pool, bs,
+ cb, opaque);
- s->this_aiocb = aiocb;
s->iov = iov;
s->bounce = qemu_memalign(512, nb_sectors * 512);
s->is_write = is_write;
s->aiocb = bdrv_aio_read(bs, sector_num, s->bounce, nb_sectors,
bdrv_aio_rw_vector_cb, s);
}
- return aiocb;
+ if (!s->aiocb) {
+ qemu_vfree(s->bounce);
+ qemu_aio_release(s);
+ return NULL;
+ }
+ return &s->common;
}
BlockDriverAIOCB *bdrv_aio_readv(BlockDriverState *bs, int64_t sector_num,
void bdrv_aio_cancel(BlockDriverAIOCB *acb)
{
- BlockDriver *drv = acb->bs->drv;
-
- if (acb->cb == bdrv_aio_rw_vector_cb) {
- VectorTranslationState *s = acb->opaque;
- acb = s->aiocb;
- }
-
- drv->bdrv_aio_cancel(acb);
+ acb->pool->cancel(acb);
}
void bdrv_init(void)
{
+ aio_pool_init(&vectored_aio_pool, sizeof(VectorTranslationAIOCB),
+ bdrv_aio_cancel_vector);
+
bdrv_register(&bdrv_raw);
bdrv_register(&bdrv_host_device);
#ifndef _WIN32
bdrv_register(&bdrv_nbd);
}
-void *qemu_aio_get(BlockDriverState *bs, BlockDriverCompletionFunc *cb,
- void *opaque)
+void aio_pool_init(AIOPool *pool, int aiocb_size,
+ void (*cancel)(BlockDriverAIOCB *acb))
+{
+ pool->aiocb_size = aiocb_size;
+ pool->cancel = cancel;
+ pool->free_aiocb = NULL;
+}
+
+void *qemu_aio_get_pool(AIOPool *pool, BlockDriverState *bs,
+ BlockDriverCompletionFunc *cb, void *opaque)
{
- BlockDriver *drv;
BlockDriverAIOCB *acb;
- drv = bs->drv;
- if (drv->free_aiocb) {
- acb = drv->free_aiocb;
- drv->free_aiocb = acb->next;
+ if (pool->free_aiocb) {
+ acb = pool->free_aiocb;
+ pool->free_aiocb = acb->next;
} else {
- acb = qemu_mallocz(drv->aiocb_size);
+ acb = qemu_mallocz(pool->aiocb_size);
+ acb->pool = pool;
}
acb->bs = bs;
acb->cb = cb;
return acb;
}
+void *qemu_aio_get(BlockDriverState *bs, BlockDriverCompletionFunc *cb,
+ void *opaque)
+{
+ return qemu_aio_get_pool(&bs->drv->aio_pool, bs, cb, opaque);
+}
+
void qemu_aio_release(void *p)
{
- BlockDriverAIOCB *acb = p;
- BlockDriver *drv = acb->bs->drv;
- acb->next = drv->free_aiocb;
- drv->free_aiocb = acb;
+ BlockDriverAIOCB *acb = (BlockDriverAIOCB *)p;
+ AIOPool *pool = acb->pool;
+ acb->next = pool->free_aiocb;
+ pool->free_aiocb = acb;
}
/**************************************************************/
/**
* If eject_flag is TRUE, eject the media. Otherwise, close the tray
*/
-void bdrv_eject(BlockDriverState *bs, int eject_flag)
+int bdrv_eject(BlockDriverState *bs, int eject_flag)
{
BlockDriver *drv = bs->drv;
int ret;
+ if (bs->locked) {
+ return -EBUSY;
+ }
+
if (!drv || !drv->bdrv_eject) {
ret = -ENOTSUP;
} else {
if (ret == -ENOTSUP) {
if (eject_flag)
bdrv_close(bs);
+ ret = 0;
}
+
+ return ret;
}
int bdrv_is_locked(BlockDriverState *bs)
projects / qemu.git / blobdiff