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mirror_qemu
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Merge remote branch 'kwolf/for-anthony' into staging

master
Anthony Liguori 2010-09-08 14:26:57 -05:00
parent dccbe6fbab 7ec5e6a4ca
commit aab2e8f79a
22 changed files with 428 additions and 135 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
block.c
View File

@ -745,6 +745,7 @@ int bdrv_check(BlockDriverState *bs, BdrvCheckResult *res)
int bdrv_commit(BlockDriverState *bs)
{
BlockDriver *drv = bs->drv;
BlockDriver *backing_drv;
int64_t sector, total_sectors;
int n, ro, open_flags;
int ret = 0, rw_ret = 0;
@ -762,7 +763,8 @@ int bdrv_commit(BlockDriverState *bs)
if (bs->backing_hd->keep_read_only) {
return -EACCES;
}
backing_drv = bs->backing_hd->drv;
ro = bs->backing_hd->read_only;
strncpy(filename, bs->backing_hd->filename, sizeof(filename));
open_flags = bs->backing_hd->open_flags;
@ -772,12 +774,14 @@ int bdrv_commit(BlockDriverState *bs)
bdrv_delete(bs->backing_hd);
bs->backing_hd = NULL;
bs_rw = bdrv_new("");
rw_ret = bdrv_open(bs_rw, filename, open_flags | BDRV_O_RDWR, drv);
rw_ret = bdrv_open(bs_rw, filename, open_flags | BDRV_O_RDWR,
backing_drv);
if (rw_ret < 0) {
bdrv_delete(bs_rw);
/* try to re-open read-only */
bs_ro = bdrv_new("");
ret = bdrv_open(bs_ro, filename, open_flags & ~BDRV_O_RDWR, drv);
ret = bdrv_open(bs_ro, filename, open_flags & ~BDRV_O_RDWR,
backing_drv);
if (ret < 0) {
bdrv_delete(bs_ro);
/* drive not functional anymore */
@ -828,7 +832,8 @@ ro_cleanup:
bdrv_delete(bs->backing_hd);
bs->backing_hd = NULL;
bs_ro = bdrv_new("");
ret = bdrv_open(bs_ro, filename, open_flags & ~BDRV_O_RDWR, drv);
ret = bdrv_open(bs_ro, filename, open_flags & ~BDRV_O_RDWR,
backing_drv);
if (ret < 0) {
bdrv_delete(bs_ro);
/* drive not functional anymore */

2
block.h
View File

@ -35,7 +35,7 @@ typedef struct QEMUSnapshotInfo {
#define BDRV_O_NO_BACKING 0x0100 /* don't open the backing file */
#define BDRV_O_NO_FLUSH 0x0200 /* disable flushing on this disk */
#define BDRV_O_CACHE_MASK (BDRV_O_NOCACHE | BDRV_O_CACHE_WB)
#define BDRV_O_CACHE_MASK (BDRV_O_NOCACHE | BDRV_O_CACHE_WB | BDRV_O_NO_FLUSH)
#define BDRV_SECTOR_BITS 9
#define BDRV_SECTOR_SIZE (1ULL << BDRV_SECTOR_BITS)

66
block/nbd.c
View File

@ -33,6 +33,8 @@
#include <sys/types.h>
#include <unistd.h>
#define EN_OPTSTR ":exportname="
typedef struct BDRVNBDState {
int sock;
off_t size;
@ -42,55 +44,83 @@ typedef struct BDRVNBDState {
static int nbd_open(BlockDriverState *bs, const char* filename, int flags)
{
BDRVNBDState *s = bs->opaque;
uint32_t nbdflags;
char *file;
char *name;
const char *host;
const char *unixpath;
int sock;
off_t size;
size_t blocksize;
int ret;
int err = -EINVAL;
if (!strstart(filename, "nbd:", &host))
return -EINVAL;
file = qemu_strdup(filename);
name = strstr(file, EN_OPTSTR);
if (name) {
if (name[strlen(EN_OPTSTR)] == 0) {
goto out;
}
name[0] = 0;
name += strlen(EN_OPTSTR);
}
if (!strstart(file, "nbd:", &host)) {
goto out;
}
if (strstart(host, "unix:", &unixpath)) {
if (unixpath[0] != '/')
return -EINVAL;
if (unixpath[0] != '/') {
goto out;
}
sock = unix_socket_outgoing(unixpath);
} else {
uint16_t port;
uint16_t port = NBD_DEFAULT_PORT;
char *p, *r;
char hostname[128];
pstrcpy(hostname, 128, host);
p = strchr(hostname, ':');
if (p == NULL)
return -EINVAL;
if (p != NULL) {
*p = '\0';
p++;
*p = '\0';
p++;
port = strtol(p, &r, 0);
if (r == p) {
goto out;
}
} else if (name == NULL) {
goto out;
}
port = strtol(p, &r, 0);
if (r == p)
return -EINVAL;
sock = tcp_socket_outgoing(hostname, port);
}
if (sock == -1)
return -errno;
if (sock == -1) {
err = -errno;
goto out;
}
ret = nbd_receive_negotiate(sock, &size, &blocksize);
if (ret == -1)
return -errno;
ret = nbd_receive_negotiate(sock, name, &nbdflags, &size, &blocksize);
if (ret == -1) {
err = -errno;
goto out;
}
s->sock = sock;
s->size = size;
s->blocksize = blocksize;
err = 0;
return 0;
out:
qemu_free(file);
return err;
}
static int nbd_read(BlockDriverState *bs, int64_t sector_num,

16
block/qcow2-cluster.c
View File

@ -655,7 +655,7 @@ static int write_l2_entries(BlockDriverState *bs, uint64_t *l2_table,
int ret;
BLKDBG_EVENT(bs->file, BLKDBG_L2_UPDATE);
ret = bdrv_pwrite_sync(bs->file, l2_offset + start_offset,
ret = bdrv_pwrite(bs->file, l2_offset + start_offset,
&l2_table[l2_start_index], len);
if (ret < 0) {
return ret;
@ -718,9 +718,17 @@ int qcow2_alloc_cluster_link_l2(BlockDriverState *bs, QCowL2Meta *m)
goto err;
}
for (i = 0; i < j; i++)
qcow2_free_any_clusters(bs,
be64_to_cpu(old_cluster[i]) & ~QCOW_OFLAG_COPIED, 1);
/*
* If this was a COW, we need to decrease the refcount of the old cluster.
* Also flush bs->file to get the right order for L2 and refcount update.
*/
if (j != 0) {
bdrv_flush(bs->file);
for (i = 0; i < j; i++) {
qcow2_free_any_clusters(bs,
be64_to_cpu(old_cluster[i]) & ~QCOW_OFLAG_COPIED, 1);
}
}
ret = 0;
err:

13
block/raw-posix.c
View File

@ -48,6 +48,7 @@
#endif
#ifdef __linux__
#include <sys/ioctl.h>
#include <sys/param.h>
#include <linux/cdrom.h>
#include <linux/fd.h>
#endif
@ -868,8 +869,13 @@ static int hdev_open(BlockDriverState *bs, const char *filename, int flags)
s->type = FTYPE_FILE;
#if defined(__linux__)
if (strstart(filename, "/dev/sg", NULL)) {
bs->sg = 1;
{
char resolved_path[ MAXPATHLEN ], *temp;
temp = realpath(filename, resolved_path);
if (temp && strstart(temp, "/dev/sg", NULL)) {
bs->sg = 1;
}
}
#endif
@ -1154,9 +1160,6 @@ static int cdrom_probe_device(const char *filename)
int fd, ret;
int prio = 0;
if (strstart(filename, "/dev/cd", NULL))
prio = 50;
fd = open(filename, O_RDONLY | O_NONBLOCK);
if (fd < 0) {
goto out;

10
block/sheepdog.c
View File

@ -8,16 +8,6 @@
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifdef _WIN32
#include <windows.h>
#include <winsock2.h>
#include <ws2tcpip.h>
#else
#include <netdb.h>
#include <netinet/tcp.h>
#define closesocket(s) close(s)
#endif
#include "qemu-common.h"
#include "qemu-error.h"

2
block/vvfat.c
View File

@ -512,7 +512,7 @@ static inline uint8_t fat_chksum(const direntry_t* entry)
for(i=0;i<11;i++) {
unsigned char c;
c = (i <= 8) ? entry->name[i] : entry->extension[i-8];
c = (i < 8) ? entry->name[i] : entry->extension[i-8];
chksum=(((chksum&0xfe)>>1)|((chksum&0x01)?0x80:0)) + c;
}

4
hw/ide/core.c
View File

@ -139,6 +139,7 @@ static void ide_identify(IDEState *s)
put_le16(p + 61, s->nb_sectors >> 16);
put_le16(p + 62, 0x07); /* single word dma0-2 supported */
put_le16(p + 63, 0x07); /* mdma0-2 supported */
put_le16(p + 64, 0x03); /* pio3-4 supported */
put_le16(p + 65, 120);
put_le16(p + 66, 120);
put_le16(p + 67, 120);
@ -199,13 +200,12 @@ static void ide_atapi_identify(IDEState *s)
put_le16(p + 53, 7); /* words 64-70, 54-58, 88 valid */
put_le16(p + 62, 7); /* single word dma0-2 supported */
put_le16(p + 63, 7); /* mdma0-2 supported */
put_le16(p + 64, 0x3f); /* PIO modes supported */
#else
put_le16(p + 49, 1 << 9); /* LBA supported, no DMA */
put_le16(p + 53, 3); /* words 64-70, 54-58 valid */
put_le16(p + 63, 0x103); /* DMA modes XXX: may be incorrect */
put_le16(p + 64, 1); /* PIO modes */
#endif
put_le16(p + 64, 3); /* pio3-4 supported */
put_le16(p + 65, 0xb4); /* minimum DMA multiword tx cycle time */
put_le16(p + 66, 0xb4); /* recommended DMA multiword tx cycle time */
put_le16(p + 67, 0x12c); /* minimum PIO cycle time without flow control */

4
hw/lsi53c895a.c
View File

@ -600,7 +600,7 @@ static void lsi_queue_command(LSIState *s)
{
lsi_request *p = s->current;
DPRINTF("Queueing tag=0x%x\n", s->current_tag);
DPRINTF("Queueing tag=0x%x\n", p->tag);
assert(s->current != NULL);
assert(s->current->dma_len == 0);
QTAILQ_INSERT_TAIL(&s->queue, s->current, next);
@ -880,7 +880,7 @@ static void lsi_do_msgout(LSIState *s)
break;
case 0x20: /* SIMPLE queue */
s->select_tag |= lsi_get_msgbyte(s) | LSI_TAG_VALID;
DPRINTF("SIMPLE queue tag=0x%x\n", s->current_tag & 0xff);
DPRINTF("SIMPLE queue tag=0x%x\n", s->select_tag & 0xff);
break;
case 0x21: /* HEAD of queue */
BADF("HEAD queue not implemented\n");

130
hw/scsi-disk.c
View File

@ -135,7 +135,7 @@ static void scsi_read_complete(void * opaque, int ret)
scsi_command_complete(r, CHECK_CONDITION, NO_SENSE);
return;
}
DPRINTF("Data ready tag=0x%x len=%" PRId64 "\n", r->req.tag, r->iov.iov_len);
DPRINTF("Data ready tag=0x%x len=%zd\n", r->req.tag, r->iov.iov_len);
r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, r->iov.iov_len);
}
@ -155,7 +155,7 @@ static void scsi_read_data(SCSIDevice *d, uint32_t tag)
return;
}
if (r->sector_count == (uint32_t)-1) {
DPRINTF("Read buf_len=%" PRId64 "\n", r->iov.iov_len);
DPRINTF("Read buf_len=%zd\n", r->iov.iov_len);
r->sector_count = 0;
r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, r->iov.iov_len);
return;
@ -486,16 +486,26 @@ static int scsi_disk_emulate_inquiry(SCSIRequest *req, uint8_t *outbuf)
return buflen;
}
static int mode_sense_page(SCSIRequest *req, int page, uint8_t *p)
static int mode_sense_page(SCSIRequest *req, int page, uint8_t *p,
int page_control)
{
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev);
BlockDriverState *bdrv = s->bs;
int cylinders, heads, secs;
/*
* If Changeable Values are requested, a mask denoting those mode parameters
* that are changeable shall be returned. As we currently don't support
* parameter changes via MODE_SELECT all bits are returned set to zero.
* The buffer was already menset to zero by the caller of this function.
*/
switch (page) {
case 4: /* Rigid disk device geometry page. */
p[0] = 4;
p[1] = 0x16;
if (page_control == 1) { /* Changeable Values */
return p[1] + 2;
}
/* if a geometry hint is available, use it */
bdrv_get_geometry_hint(bdrv, &cylinders, &heads, &secs);
p[2] = (cylinders >> 16) & 0xff;
@ -520,11 +530,14 @@ static int mode_sense_page(SCSIRequest *req, int page, uint8_t *p)
/* Medium rotation rate [rpm], 5400 rpm */
p[20] = (5400 >> 8) & 0xff;
p[21] = 5400 & 0xff;
return 0x16;
return p[1] + 2;
case 5: /* Flexible disk device geometry page. */
p[0] = 5;
p[1] = 0x1e;
if (page_control == 1) { /* Changeable Values */
return p[1] + 2;
}
/* Transfer rate [kbit/s], 5Mbit/s */
p[2] = 5000 >> 8;
p[3] = 5000 & 0xff;
@ -556,21 +569,27 @@ static int mode_sense_page(SCSIRequest *req, int page, uint8_t *p)
/* Medium rotation rate [rpm], 5400 rpm */
p[28] = (5400 >> 8) & 0xff;
p[29] = 5400 & 0xff;
return 0x1e;
return p[1] + 2;
case 8: /* Caching page. */
p[0] = 8;
p[1] = 0x12;
if (page_control == 1) { /* Changeable Values */
return p[1] + 2;
}
if (bdrv_enable_write_cache(s->bs)) {
p[2] = 4; /* WCE */
}
return 20;
return p[1] + 2;
case 0x2a: /* CD Capabilities and Mechanical Status page. */
if (bdrv_get_type_hint(bdrv) != BDRV_TYPE_CDROM)
return 0;
p[0] = 0x2a;
p[1] = 0x14;
if (page_control == 1) { /* Changeable Values */
return p[1] + 2;
}
p[2] = 3; // CD-R & CD-RW read
p[3] = 0; // Writing not supported
p[4] = 0x7f; /* Audio, composite, digital out,
@ -594,7 +613,7 @@ static int mode_sense_page(SCSIRequest *req, int page, uint8_t *p)
p[19] = (16 * 176) & 0xff;
p[20] = (16 * 176) >> 8; // 16x write speed current
p[21] = (16 * 176) & 0xff;
return 22;
return p[1] + 2;
default:
return 0;
@ -605,29 +624,46 @@ static int scsi_disk_emulate_mode_sense(SCSIRequest *req, uint8_t *outbuf)
{
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev);
uint64_t nb_sectors;
int page, dbd, buflen;
int page, dbd, buflen, page_control;
uint8_t *p;
uint8_t dev_specific_param;
dbd = req->cmd.buf[1] & 0x8;
page = req->cmd.buf[2] & 0x3f;
DPRINTF("Mode Sense (page %d, len %zd)\n", page, req->cmd.xfer);
page_control = (req->cmd.buf[2] & 0xc0) >> 6;
DPRINTF("Mode Sense(%d) (page %d, xfer %zd, page_control %d)\n",
(req->cmd.buf[0] == MODE_SENSE) ? 6 : 10, page, req->cmd.xfer, page_control);
memset(outbuf, 0, req->cmd.xfer);
p = outbuf;
p[1] = 0; /* Default media type. */
p[3] = 0; /* Block descriptor length. */
if (bdrv_is_read_only(s->bs)) {
p[2] = 0x80; /* Readonly. */
dev_specific_param = 0x80; /* Readonly. */
} else {
dev_specific_param = 0x00;
}
if (req->cmd.buf[0] == MODE_SENSE) {
p[1] = 0; /* Default media type. */
p[2] = dev_specific_param;
p[3] = 0; /* Block descriptor length. */
p += 4;
} else { /* MODE_SENSE_10 */
p[2] = 0; /* Default media type. */
p[3] = dev_specific_param;
p[6] = p[7] = 0; /* Block descriptor length. */
p += 8;
}
p += 4;
bdrv_get_geometry(s->bs, &nb_sectors);
if ((~dbd) & nb_sectors) {
outbuf[3] = 8; /* Block descriptor length */
if (!dbd && nb_sectors) {
if (req->cmd.buf[0] == MODE_SENSE) {
outbuf[3] = 8; /* Block descriptor length */
} else { /* MODE_SENSE_10 */
outbuf[7] = 8; /* Block descriptor length */
}
nb_sectors /= s->cluster_size;
nb_sectors--;
if (nb_sectors > 0xffffff)
nb_sectors = 0xffffff;
nb_sectors = 0;
p[0] = 0; /* media density code */
p[1] = (nb_sectors >> 16) & 0xff;
p[2] = (nb_sectors >> 8) & 0xff;
@ -639,21 +675,37 @@ static int scsi_disk_emulate_mode_sense(SCSIRequest *req, uint8_t *outbuf)
p += 8;
}
if (page_control == 3) { /* Saved Values */
return -1; /* ILLEGAL_REQUEST */
}
switch (page) {
case 0x04:
case 0x05:
case 0x08:
case 0x2a:
p += mode_sense_page(req, page, p);
p += mode_sense_page(req, page, p, page_control);
break;
case 0x3f:
p += mode_sense_page(req, 0x08, p);
p += mode_sense_page(req, 0x2a, p);
p += mode_sense_page(req, 0x08, p, page_control);
p += mode_sense_page(req, 0x2a, p, page_control);
break;
default:
return -1; /* ILLEGAL_REQUEST */
}
buflen = p - outbuf;
outbuf[0] = buflen - 4;
/*
* The mode data length field specifies the length in bytes of the
* following data that is available to be transferred. The mode data
* length does not include itself.
*/
if (req->cmd.buf[0] == MODE_SENSE) {
outbuf[0] = buflen - 1;
} else { /* MODE_SENSE_10 */
outbuf[0] = ((buflen - 2) >> 8) & 0xff;
outbuf[1] = (buflen - 2) & 0xff;
}
if (buflen > req->cmd.xfer)
buflen = req->cmd.xfer;
return buflen;
@ -840,6 +892,12 @@ static int scsi_disk_emulate_command(SCSIRequest *req, uint8_t *outbuf)
break;
case VERIFY:
break;
case REZERO_UNIT:
DPRINTF("Rezero Unit\n");
if (!bdrv_is_inserted(s->bs)) {
goto not_ready;
}
break;
default:
goto illegal_request;
}
@ -959,6 +1017,7 @@ static int32_t scsi_send_command(SCSIDevice *d, uint32_t tag,
case SERVICE_ACTION_IN:
case REPORT_LUNS:
case VERIFY:
case REZERO_UNIT:
rc = scsi_disk_emulate_command(&r->req, outbuf);
if (rc > 0) {
r->iov.iov_len = rc;
@ -982,13 +1041,40 @@ static int32_t scsi_send_command(SCSIDevice *d, uint32_t tag,
case WRITE_10:
case WRITE_12:
case WRITE_16:
DPRINTF("Write (sector %" PRId64 ", count %d)\n", lba, len);
case WRITE_VERIFY:
case WRITE_VERIFY_12:
case WRITE_VERIFY_16:
DPRINTF("Write %s(sector %" PRId64 ", count %d)\n",
(command & 0xe) == 0xe ? "And Verify " : "", lba, len);
if (lba > s->max_lba)
goto illegal_lba;
r->sector = lba * s->cluster_size;
r->sector_count = len * s->cluster_size;
is_write = 1;
break;
case MODE_SELECT:
DPRINTF("Mode Select(6) (len %d)\n", len);
/* We don't support mode parameter changes.
Allow the mode parameter header + block descriptors only. */
if (len > 12) {
goto fail;
}
break;
case MODE_SELECT_10:
DPRINTF("Mode Select(10) (len %d)\n", len);
/* We don't support mode parameter changes.
Allow the mode parameter header + block descriptors only. */
if (len > 16) {
goto fail;
}
break;
case SEEK_6:
case SEEK_10:
DPRINTF("Seek(%d) (sector %" PRId64 ")\n", command == SEEK_6 ? 6 : 10, lba);
if (lba > s->max_lba) {
goto illegal_lba;
}
break;
default:
DPRINTF("Unknown SCSI command (%2.2x)\n", buf[0]);
fail:

18
hw/scsi-generic.c
View File

@ -164,7 +164,7 @@ static void scsi_read_complete(void * opaque, int ret)
int len;
if (ret) {
DPRINTF("IO error\n");
DPRINTF("IO error ret %d\n", ret);
scsi_command_complete(r, ret);
return;
}
@ -236,7 +236,7 @@ static void scsi_write_complete(void * opaque, int ret)
if (r->req.cmd.buf[0] == MODE_SELECT && r->req.cmd.buf[4] == 12 &&
s->qdev.type == TYPE_TAPE) {
s->qdev.blocksize = (r->buf[9] << 16) | (r->buf[10] << 8) | r->buf[11];
DPRINTF("block size %d\n", s->blocksize);
DPRINTF("block size %d\n", s->qdev.blocksize);
}
scsi_command_complete(r, ret);
@ -351,8 +351,18 @@ static int32_t scsi_send_command(SCSIDevice *d, uint32_t tag,
}
scsi_req_fixup(&r->req);
DPRINTF("Command: lun=%d tag=0x%x data=0x%02x len %d\n", lun, tag,
cmd[0], r->req.cmd.xfer);
DPRINTF("Command: lun=%d tag=0x%x len %zd data=0x%02x", lun, tag,
r->req.cmd.xfer, cmd[0]);
#ifdef DEBUG_SCSI
{
int i;
for (i = 1; i < r->req.cmd.len; i++) {
printf(" 0x%02x", cmd[i]);
}
printf("\n");
}
#endif
if (r->req.cmd.xfer == 0) {
if (r->buf != NULL)

5
hw/virtio-blk.c
View File

@ -481,6 +481,11 @@ static int virtio_blk_load(QEMUFile *f, void *opaque, int version_id)
qemu_get_buffer(f, (unsigned char*)&req->elem, sizeof(req->elem));
req->next = s->rq;
s->rq = req;
virtqueue_map_sg(req->elem.in_sg, req->elem.in_addr,
req->elem.in_num, 1);
virtqueue_map_sg(req->elem.out_sg, req->elem.out_addr,
req->elem.out_num, 0);
}
return 0;

40
hw/virtio.c
View File

@ -360,11 +360,26 @@ int virtqueue_avail_bytes(VirtQueue *vq, int in_bytes, int out_bytes)
return 0;
}
void virtqueue_map_sg(struct iovec *sg, target_phys_addr_t *addr,
size_t num_sg, int is_write)
{
unsigned int i;
target_phys_addr_t len;
for (i = 0; i < num_sg; i++) {
len = sg[i].iov_len;
sg[i].iov_base = cpu_physical_memory_map(addr[i], &len, is_write);
if (sg[i].iov_base == NULL || len != sg[i].iov_len) {
fprintf(stderr, "virtio: trying to map MMIO memory\n");
exit(1);
}
}
}
int virtqueue_pop(VirtQueue *vq, VirtQueueElement *elem)
{
unsigned int i, head, max;
target_phys_addr_t desc_pa = vq->vring.desc;
target_phys_addr_t len;
if (!virtqueue_num_heads(vq, vq->last_avail_idx))
return 0;
@ -388,29 +403,20 @@ int virtqueue_pop(VirtQueue *vq, VirtQueueElement *elem)
i = 0;
}
/* Collect all the descriptors */
do {
struct iovec *sg;
int is_write = 0;
if (vring_desc_flags(desc_pa, i) & VRING_DESC_F_WRITE) {
elem->in_addr[elem->in_num] = vring_desc_addr(desc_pa, i);
sg = &elem->in_sg[elem->in_num++];
is_write = 1;
} else
} else {
elem->out_addr[elem->out_num] = vring_desc_addr(desc_pa, i);
sg = &elem->out_sg[elem->out_num++];
/* Grab the first descriptor, and check it's OK. */
sg->iov_len = vring_desc_len(desc_pa, i);
len = sg->iov_len;
sg->iov_base = cpu_physical_memory_map(vring_desc_addr(desc_pa, i),
&len, is_write);
if (sg->iov_base == NULL || len != sg->iov_len) {
fprintf(stderr, "virtio: trying to map MMIO memory\n");
exit(1);
}
sg->iov_len = vring_desc_len(desc_pa, i);
/* If we've got too many, that implies a descriptor loop. */
if ((elem->in_num + elem->out_num) > max) {
fprintf(stderr, "Looped descriptor");
@ -418,6 +424,10 @@ int virtqueue_pop(VirtQueue *vq, VirtQueueElement *elem)
}
} while ((i = virtqueue_next_desc(desc_pa, i, max)) != max);
/* Now map what we have collected */
virtqueue_map_sg(elem->in_sg, elem->in_addr, elem->in_num, 1);
virtqueue_map_sg(elem->out_sg, elem->out_addr, elem->out_num, 0);
elem->index = head;
vq->inuse++;

3
hw/virtio.h
View File

@ -81,6 +81,7 @@ typedef struct VirtQueueElement
unsigned int out_num;
unsigned int in_num;
target_phys_addr_t in_addr[VIRTQUEUE_MAX_SIZE];
target_phys_addr_t out_addr[VIRTQUEUE_MAX_SIZE];
struct iovec in_sg[VIRTQUEUE_MAX_SIZE];
struct iovec out_sg[VIRTQUEUE_MAX_SIZE];
} VirtQueueElement;
@ -142,6 +143,8 @@ void virtqueue_flush(VirtQueue *vq, unsigned int count);
void virtqueue_fill(VirtQueue *vq, const VirtQueueElement *elem,
unsigned int len, unsigned int idx);
void virtqueue_map_sg(struct iovec *sg, target_phys_addr_t *addr,
size_t num_sg, int is_write);
int virtqueue_pop(VirtQueue *vq, VirtQueueElement *elem);
int virtqueue_avail_bytes(VirtQueue *vq, int in_bytes, int out_bytes);

118
nbd.c
View File

@ -62,6 +62,8 @@
#define NBD_SET_SIZE_BLOCKS _IO(0xab, 7)
#define NBD_DISCONNECT _IO(0xab, 8)
#define NBD_OPT_EXPORT_NAME (1 << 0)
/* That's all folks */
#define read_sync(fd, buffer, size) nbd_wr_sync(fd, buffer, size, true)
@ -296,22 +298,27 @@ int nbd_negotiate(int csock, off_t size)
return 0;
}
int nbd_receive_negotiate(int csock, off_t *size, size_t *blocksize)
int nbd_receive_negotiate(int csock, const char *name, uint32_t *flags,
off_t *size, size_t *blocksize)
{
char buf[8 + 8 + 8 + 128];
uint64_t magic;
char buf[256];
uint64_t magic, s;
uint16_t tmp;
TRACE("Receiving negotation.");
if (read_sync(csock, buf, sizeof(buf)) != sizeof(buf)) {
if (read_sync(csock, buf, 8) != 8) {
LOG("read failed");
errno = EINVAL;
return -1;
}
magic = be64_to_cpup((uint64_t*)(buf + 8));
*size = be64_to_cpup((uint64_t*)(buf + 16));
*blocksize = 1024;
buf[8] = '\0';
if (strlen(buf) == 0) {
LOG("server connection closed");
errno = EINVAL;
return -1;
}
TRACE("Magic is %c%c%c%c%c%c%c%c",
qemu_isprint(buf[0]) ? buf[0] : '.',
@ -322,8 +329,6 @@ int nbd_receive_negotiate(int csock, off_t *size, size_t *blocksize)
qemu_isprint(buf[5]) ? buf[5] : '.',
qemu_isprint(buf[6]) ? buf[6] : '.',
qemu_isprint(buf[7]) ? buf[7] : '.');
TRACE("Magic is 0x%" PRIx64, magic);
TRACE("Size is %" PRIu64, *size);
if (memcmp(buf, "NBDMAGIC", 8) != 0) {
LOG("Invalid magic received");
@ -331,10 +336,99 @@ int nbd_receive_negotiate(int csock, off_t *size, size_t *blocksize)
return -1;
}
TRACE("Checking magic");
if (read_sync(csock, &magic, sizeof(magic)) != sizeof(magic)) {
LOG("read failed");
errno = EINVAL;
return -1;
}
magic = be64_to_cpu(magic);
TRACE("Magic is 0x%" PRIx64, magic);
if (magic != 0x00420281861253LL) {
LOG("Bad magic received");
if (name) {
uint32_t reserved = 0;
uint32_t opt;
uint32_t namesize;
TRACE("Checking magic (opts_magic)");
if (magic != 0x49484156454F5054LL) {
LOG("Bad magic received");
errno = EINVAL;
return -1;
}
if (read_sync(csock, &tmp, sizeof(tmp)) != sizeof(tmp)) {
LOG("flags read failed");
errno = EINVAL;
return -1;
}
*flags = be16_to_cpu(tmp) << 16;
/* reserved for future use */
if (write_sync(csock, &reserved, sizeof(reserved)) !=
sizeof(reserved)) {
LOG("write failed (reserved)");
errno = EINVAL;
return -1;
}
/* write the export name */
magic = cpu_to_be64(magic);
if (write_sync(csock, &magic, sizeof(magic)) != sizeof(magic)) {
LOG("write failed (magic)");
errno = EINVAL;
return -1;
}
opt = cpu_to_be32(NBD_OPT_EXPORT_NAME);
if (write_sync(csock, &opt, sizeof(opt)) != sizeof(opt)) {
LOG("write failed (opt)");
errno = EINVAL;
return -1;
}
namesize = cpu_to_be32(strlen(name));
if (write_sync(csock, &namesize, sizeof(namesize)) !=
sizeof(namesize)) {
LOG("write failed (namesize)");
errno = EINVAL;
return -1;
}
if (write_sync(csock, (char*)name, strlen(name)) != strlen(name)) {
LOG("write failed (name)");
errno = EINVAL;
return -1;
}
} else {
TRACE("Checking magic (cli_magic)");
if (magic != 0x00420281861253LL) {
LOG("Bad magic received");
errno = EINVAL;
return -1;
}
}
if (read_sync(csock, &s, sizeof(s)) != sizeof(s)) {
LOG("read failed");
errno = EINVAL;
return -1;
}
*size = be64_to_cpu(s);
*blocksize = 1024;
TRACE("Size is %" PRIu64, *size);
if (!name) {
if (read_sync(csock, flags, sizeof(*flags)) != sizeof(*flags)) {
LOG("read failed (flags)");
errno = EINVAL;
return -1;
}
*flags = be32_to_cpup(flags);
} else {
if (read_sync(csock, &tmp, sizeof(tmp)) != sizeof(tmp)) {
LOG("read failed (tmp)");
errno = EINVAL;
return -1;
}
*flags |= be32_to_cpu(tmp);
}
if (read_sync(csock, &buf, 124) != 124) {
LOG("read failed (buf)");
errno = EINVAL;
return -1;
}

5
nbd.h
View File

@ -42,6 +42,8 @@ enum {
NBD_CMD_DISC = 2
};
#define NBD_DEFAULT_PORT 10809
size_t nbd_wr_sync(int fd, void *buffer, size_t size, bool do_read);
int tcp_socket_outgoing(const char *address, uint16_t port);
int tcp_socket_incoming(const char *address, uint16_t port);
@ -49,7 +51,8 @@ int unix_socket_outgoing(const char *path);
int unix_socket_incoming(const char *path);
int nbd_negotiate(int csock, off_t size);
int nbd_receive_negotiate(int csock, off_t *size, size_t *blocksize);
int nbd_receive_negotiate(int csock, const char *name, uint32_t *flags,
off_t *size, size_t *blocksize);
int nbd_init(int fd, int csock, off_t size, size_t blocksize);
int nbd_send_request(int csock, struct nbd_request *request);
int nbd_receive_reply(int csock, struct nbd_reply *reply);

1
posix-aio-compat.c
View File

@ -599,6 +599,7 @@ BlockDriverAIOCB *paio_ioctl(BlockDriverState *bs, int fd,
acb->aio_type = QEMU_AIO_IOCTL;
acb->aio_fildes = fd;
acb->ev_signo = SIGUSR2;
acb->async_context_id = get_async_context_id();
acb->aio_offset = 0;
acb->aio_ioctl_buf = buf;
acb->aio_ioctl_cmd = req;

7
qemu-doc.texi
View File

@ -620,6 +620,13 @@ qemu linux1.img -hdb nbd:unix:/tmp/my_socket
qemu linux2.img -hdb nbd:unix:/tmp/my_socket
@end example
If the nbd-server uses named exports (since NBD 2.9.18), you must use the
"exportname" option:
@example
qemu -cdrom nbd:localhost:exportname=debian-500-ppc-netinst
qemu -cdrom nbd:localhost:exportname=openSUSE-11.1-ppc-netinst
@end example
@node pcsys_network
@section Network emulation

5
qemu-img.c
View File

@ -783,7 +783,8 @@ static int img_convert(int argc, char **argv)
goto out;
}
out_bs = bdrv_new_open(out_filename, out_fmt, BDRV_O_FLAGS | BDRV_O_RDWR);
out_bs = bdrv_new_open(out_filename, out_fmt,
BDRV_O_FLAGS | BDRV_O_RDWR | BDRV_O_NO_FLUSH);
if (!out_bs) {
ret = -1;
goto out;
@ -1286,7 +1287,7 @@ static int img_rebase(int argc, char **argv)
}
bs_new_backing = bdrv_new("new_backing");
ret = bdrv_open(bs_new_backing, out_baseimg, BDRV_O_FLAGS | BDRV_O_RDWR,
ret = bdrv_open(bs_new_backing, out_baseimg, BDRV_O_FLAGS,
new_backing_drv);
if (ret) {
error("Could not open new backing file '%s'", out_baseimg);

7
qemu-io.c
View File

@ -1427,11 +1427,8 @@ alloc_f(int argc, char **argv)
cvtstr(offset, s1, sizeof(s1));
if (nb_sectors == 1)
printf("sector allocated at offset %s\n", s1);
else
printf("%d/%d sectors allocated at offset %s\n",
sum_alloc, nb_sectors, s1);
printf("%d/%d sectors allocated at offset %s\n",
sum_alloc, nb_sectors, s1);
return 0;
}

4
qemu-nbd.c
View File

@ -230,6 +230,7 @@ int main(int argc, char **argv)
int nb_fds = 0;
int max_fd;
int persistent = 0;
uint32_t nbdflags;
while ((ch = getopt_long(argc, argv, sopt, lopt, &opt_ind)) != -1) {
switch (ch) {
@ -398,7 +399,8 @@ int main(int argc, char **argv)
goto out;
}
ret = nbd_receive_negotiate(sock, &size, &blocksize);
ret = nbd_receive_negotiate(sock, NULL, &nbdflags,
&size, &blocksize);
if (ret == -1) {
ret = 1;
goto out;

90
savevm.c
View File

@ -1837,8 +1837,10 @@ void do_savevm(Monitor *mon, const QDict *qdict)
uint32_t vm_state_size;
#ifdef _WIN32
struct _timeb tb;
struct tm *ptm;
#else
struct timeval tv;
struct tm tm;
#endif
const char *name = qdict_get_try_str(qdict, "name");
@ -1869,15 +1871,6 @@ void do_savevm(Monitor *mon, const QDict *qdict)
vm_stop(0);
memset(sn, 0, sizeof(*sn));
if (name) {
ret = bdrv_snapshot_find(bs, old_sn, name);
if (ret >= 0) {
pstrcpy(sn->name, sizeof(sn->name), old_sn->name);
pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str);
} else {
pstrcpy(sn->name, sizeof(sn->name), name);
}
}
/* fill auxiliary fields */
#ifdef _WIN32
@ -1891,6 +1884,24 @@ void do_savevm(Monitor *mon, const QDict *qdict)
#endif
sn->vm_clock_nsec = qemu_get_clock(vm_clock);
if (name) {
ret = bdrv_snapshot_find(bs, old_sn, name);
if (ret >= 0) {
pstrcpy(sn->name, sizeof(sn->name), old_sn->name);
pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str);
} else {
pstrcpy(sn->name, sizeof(sn->name), name);
}
} else {
#ifdef _WIN32
ptm = localtime(&tb.time);
strftime(sn->name, sizeof(sn->name), "vm-%Y%m%d%H%M%S", ptm);
#else
localtime_r(&tv.tv_sec, &tm);
strftime(sn->name, sizeof(sn->name), "vm-%Y%m%d%H%M%S", &tm);
#endif
}
/* Delete old snapshots of the same name */
if (name && del_existing_snapshots(mon, name) < 0) {
goto the_end;
@ -2039,8 +2050,10 @@ void do_delvm(Monitor *mon, const QDict *qdict)
void do_info_snapshots(Monitor *mon)
{
BlockDriverState *bs, *bs1;
QEMUSnapshotInfo *sn_tab, *sn;
int nb_sns, i;
QEMUSnapshotInfo *sn_tab, *sn, s, *sn_info = &s;
int nb_sns, i, ret, available;
int total;
int *available_snapshots;
char buf[256];
bs = bdrv_snapshots();
@ -2048,27 +2061,52 @@ void do_info_snapshots(Monitor *mon)
monitor_printf(mon, "No available block device supports snapshots\n");
return;
}
monitor_printf(mon, "Snapshot devices:");
bs1 = NULL;
while ((bs1 = bdrv_next(bs1))) {
if (bdrv_can_snapshot(bs1)) {
if (bs == bs1)
monitor_printf(mon, " %s", bdrv_get_device_name(bs1));
}
}
monitor_printf(mon, "\n");
nb_sns = bdrv_snapshot_list(bs, &sn_tab);
if (nb_sns < 0) {
monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns);
return;
}
monitor_printf(mon, "Snapshot list (from %s):\n",
bdrv_get_device_name(bs));
monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL));
for(i = 0; i < nb_sns; i++) {
sn = &sn_tab[i];
monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn));
if (nb_sns == 0) {
monitor_printf(mon, "There is no snapshot available.\n");
return;
}
available_snapshots = qemu_mallocz(sizeof(int) * nb_sns);
total = 0;
for (i = 0; i < nb_sns; i++) {
sn = &sn_tab[i];
available = 1;
bs1 = NULL;
while ((bs1 = bdrv_next(bs1))) {
if (bdrv_can_snapshot(bs1) && bs1 != bs) {
ret = bdrv_snapshot_find(bs1, sn_info, sn->id_str);
if (ret < 0) {
available = 0;
break;
}
}
}
if (available) {
available_snapshots[total] = i;
total++;
}
}
if (total > 0) {
monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL));
for (i = 0; i < total; i++) {
sn = &sn_tab[available_snapshots[i]];
monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn));
}
} else {
monitor_printf(mon, "There is no suitable snapshot available\n");
}
qemu_free(sn_tab);
qemu_free(available_snapshots);
}