*/
#include "qemu/osdep.h"
-#include "qemu-common.h"
+#include "qapi/error.h"
#include "qemu/uri.h"
#include "qemu/error-report.h"
#include "qemu/sockets.h"
#include "block/block_int.h"
+#include "sysemu/block-backend.h"
#include "qemu/bitops.h"
+#include "qemu/cutils.h"
#define SD_PROTO_VER 0x01
return !!inode->snap_ctime;
}
+static inline size_t count_data_objs(const struct SheepdogInode *inode)
+{
+ return DIV_ROUND_UP(inode->vdi_size,
+ (1UL << inode->block_size_shift));
+}
+
#undef DPRINTF
#ifdef DEBUG_SDOG
#define DPRINTF(fmt, args...) \
ret = qemu_co_send(sockfd, hdr, sizeof(*hdr));
if (ret != sizeof(*hdr)) {
error_report("failed to send a req, %s", strerror(errno));
- ret = -socket_error();
- return ret;
+ return -errno;
}
ret = qemu_co_send(sockfd, data, *wlen);
if (ret != *wlen) {
- ret = -socket_error();
error_report("failed to send a req, %s", strerror(errno));
+ return -errno;
}
return ret;
static int sd_prealloc(const char *filename, Error **errp)
{
- BlockDriverState *bs = NULL;
+ BlockBackend *blk = NULL;
BDRVSheepdogState *base = NULL;
unsigned long buf_size;
uint32_t idx, max_idx;
void *buf = NULL;
int ret;
- ret = bdrv_open(&bs, filename, NULL, NULL, BDRV_O_RDWR | BDRV_O_PROTOCOL,
- errp);
- if (ret < 0) {
+ blk = blk_new_open(filename, NULL, NULL,
+ BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_PROTOCOL,
+ errp);
+ if (blk == NULL) {
+ ret = -EIO;
goto out_with_err_set;
}
- vdi_size = bdrv_getlength(bs);
+ blk_set_allow_write_beyond_eof(blk, true);
+
+ vdi_size = blk_getlength(blk);
if (vdi_size < 0) {
ret = vdi_size;
goto out;
}
- base = bs->opaque;
+ base = blk_bs(blk)->opaque;
object_size = (UINT32_C(1) << base->inode.block_size_shift);
buf_size = MIN(object_size, SD_DATA_OBJ_SIZE);
buf = g_malloc0(buf_size);
* The created image can be a cloned image, so we need to read
* a data from the source image.
*/
- ret = bdrv_pread(bs, idx * buf_size, buf, buf_size);
+ ret = blk_pread(blk, idx * buf_size, buf, buf_size);
if (ret < 0) {
goto out;
}
- ret = bdrv_pwrite(bs, idx * buf_size, buf, buf_size);
+ ret = blk_pwrite(blk, idx * buf_size, buf, buf_size);
if (ret < 0) {
goto out;
}
}
+ ret = 0;
out:
if (ret < 0) {
error_setg_errno(errp, -ret, "Can't pre-allocate");
}
out_with_err_set:
- if (bs) {
- bdrv_unref(bs);
+ if (blk) {
+ blk_unref(blk);
}
g_free(buf);
}
if (backing_file) {
- BlockDriverState *bs;
+ BlockBackend *blk;
BDRVSheepdogState *base;
BlockDriver *drv;
goto out;
}
- bs = NULL;
- ret = bdrv_open(&bs, backing_file, NULL, NULL, BDRV_O_PROTOCOL, errp);
- if (ret < 0) {
+ blk = blk_new_open(backing_file, NULL, NULL,
+ BDRV_O_PROTOCOL | BDRV_O_CACHE_WB, errp);
+ if (blk == NULL) {
+ ret = -EIO;
goto out;
}
- base = bs->opaque;
+ base = blk_bs(blk)->opaque;
if (!is_snapshot(&base->inode)) {
error_setg(errp, "cannot clone from a non snapshot vdi");
- bdrv_unref(bs);
+ blk_unref(blk);
ret = -EINVAL;
goto out;
}
s->inode.vdi_id = base->inode.vdi_id;
- bdrv_unref(bs);
+ blk_unref(blk);
}
s->aio_context = qemu_get_aio_context();
return ret;
}
+#define NR_BATCHED_DISCARD 128
+
+static bool remove_objects(BDRVSheepdogState *s)
+{
+ int fd, i = 0, nr_objs = 0;
+ Error *local_err = NULL;
+ int ret = 0;
+ bool result = true;
+ SheepdogInode *inode = &s->inode;
+
+ fd = connect_to_sdog(s, &local_err);
+ if (fd < 0) {
+ error_report_err(local_err);
+ return false;
+ }
+
+ nr_objs = count_data_objs(inode);
+ while (i < nr_objs) {
+ int start_idx, nr_filled_idx;
+
+ while (i < nr_objs && !inode->data_vdi_id[i]) {
+ i++;
+ }
+ start_idx = i;
+
+ nr_filled_idx = 0;
+ while (i < nr_objs && nr_filled_idx < NR_BATCHED_DISCARD) {
+ if (inode->data_vdi_id[i]) {
+ inode->data_vdi_id[i] = 0;
+ nr_filled_idx++;
+ }
+
+ i++;
+ }
+
+ ret = write_object(fd, s->aio_context,
+ (char *)&inode->data_vdi_id[start_idx],
+ vid_to_vdi_oid(s->inode.vdi_id), inode->nr_copies,
+ (i - start_idx) * sizeof(uint32_t),
+ offsetof(struct SheepdogInode,
+ data_vdi_id[start_idx]),
+ false, s->cache_flags);
+ if (ret < 0) {
+ error_report("failed to discard snapshot inode.");
+ result = false;
+ goto out;
+ }
+ }
+
+out:
+ closesocket(fd);
+ return result;
+}
+
static int sd_snapshot_delete(BlockDriverState *bs,
const char *snapshot_id,
const char *name,
Error **errp)
{
- /* FIXME: Delete specified snapshot id. */
- return 0;
+ unsigned long snap_id = 0;
+ char snap_tag[SD_MAX_VDI_TAG_LEN];
+ Error *local_err = NULL;
+ int fd, ret;
+ char buf[SD_MAX_VDI_LEN + SD_MAX_VDI_TAG_LEN];
+ BDRVSheepdogState *s = bs->opaque;
+ unsigned int wlen = SD_MAX_VDI_LEN + SD_MAX_VDI_TAG_LEN, rlen = 0;
+ uint32_t vid;
+ SheepdogVdiReq hdr = {
+ .opcode = SD_OP_DEL_VDI,
+ .data_length = wlen,
+ .flags = SD_FLAG_CMD_WRITE,
+ };
+ SheepdogVdiRsp *rsp = (SheepdogVdiRsp *)&hdr;
+
+ if (!remove_objects(s)) {
+ return -1;
+ }
+
+ memset(buf, 0, sizeof(buf));
+ memset(snap_tag, 0, sizeof(snap_tag));
+ pstrcpy(buf, SD_MAX_VDI_LEN, s->name);
+ ret = qemu_strtoul(snapshot_id, NULL, 10, &snap_id);
+ if (ret || snap_id > UINT32_MAX) {
+ error_setg(errp, "Invalid snapshot ID: %s",
+ snapshot_id ? snapshot_id : "<null>");
+ return -EINVAL;
+ }
+
+ if (snap_id) {
+ hdr.snapid = (uint32_t) snap_id;
+ } else {
+ pstrcpy(snap_tag, sizeof(snap_tag), snapshot_id);
+ pstrcpy(buf + SD_MAX_VDI_LEN, SD_MAX_VDI_TAG_LEN, snap_tag);
+ }
+
+ ret = find_vdi_name(s, s->name, snap_id, snap_tag, &vid, true,
+ &local_err);
+ if (ret) {
+ return ret;
+ }
+
+ fd = connect_to_sdog(s, &local_err);
+ if (fd < 0) {
+ error_report_err(local_err);
+ return -1;
+ }
+
+ ret = do_req(fd, s->aio_context, (SheepdogReq *)&hdr,
+ buf, &wlen, &rlen);
+ closesocket(fd);
+ if (ret) {
+ return ret;
+ }
+
+ switch (rsp->result) {
+ case SD_RES_NO_VDI:
+ error_report("%s was already deleted", s->name);
+ case SD_RES_SUCCESS:
+ break;
+ default:
+ error_report("%s, %s", sd_strerror(rsp->result), s->name);
+ return -1;
+ }
+
+ return ret;
}
static int sd_snapshot_list(BlockDriverState *bs, QEMUSnapshotInfo **psn_tab)
static coroutine_fn int64_t
sd_co_get_block_status(BlockDriverState *bs, int64_t sector_num, int nb_sectors,
- int *pnum)
+ int *pnum, BlockDriverState **file)
{
BDRVSheepdogState *s = bs->opaque;
SheepdogInode *inode = &s->inode;
if (*pnum > nb_sectors) {
*pnum = nb_sectors;
}
+ if (ret > 0 && ret & BDRV_BLOCK_OFFSET_VALID) {
+ *file = bs;
+ }
return ret;
}
projects / qemu.git / blobdiff