@@ -54,6 +54,9 @@ struct BlockExport {
*/
AioContext *ctx;
+ /* The block device to export */
+ BlockBackend *blk;
+
/* List entry for block_exports */
QLIST_ENTRY(BlockExport) next;
};
@@ -89,6 +89,8 @@ BlockExport *blk_exp_add(BlockExportOptions *export, Error **errp)
return NULL;
}
+ assert(exp->blk != NULL);
+
QLIST_INSERT_HEAD(&block_exports, exp, next);
return exp;
}
@@ -105,6 +107,7 @@ void blk_exp_unref(BlockExport *exp)
if (--exp->refcount == 0) {
QLIST_REMOVE(exp, next);
exp->drv->delete(exp);
+ blk_unref(exp->blk);
g_free(exp->id);
g_free(exp);
aio_wait_kick();
@@ -84,7 +84,6 @@ struct NBDRequestData {
struct NBDExport {
BlockExport common;
- BlockBackend *blk;
char *name;
char *description;
uint64_t size;
@@ -643,7 +642,7 @@ static int nbd_negotiate_handle_info(NBDClient *client, Error **errp)
* whether this is OPT_INFO or OPT_GO. */
/* minimum - 1 for back-compat, or actual if client will obey it. */
if (client->opt == NBD_OPT_INFO || blocksize) {
- check_align = sizes[0] = blk_get_request_alignment(exp->blk);
+ check_align = sizes[0] = blk_get_request_alignment(exp->common.blk);
} else {
sizes[0] = 1;
}
@@ -652,7 +651,7 @@ static int nbd_negotiate_handle_info(NBDClient *client, Error **errp)
* TODO: is blk_bs(blk)->bl.opt_transfer appropriate? */
sizes[1] = MAX(4096, sizes[0]);
/* maximum - At most 32M, but smaller as appropriate. */
- sizes[2] = MIN(blk_get_max_transfer(exp->blk), NBD_MAX_BUFFER_SIZE);
+ sizes[2] = MIN(blk_get_max_transfer(exp->common.blk), NBD_MAX_BUFFER_SIZE);
trace_nbd_negotiate_handle_info_block_size(sizes[0], sizes[1], sizes[2]);
sizes[0] = cpu_to_be32(sizes[0]);
sizes[1] = cpu_to_be32(sizes[1]);
@@ -684,7 +683,7 @@ static int nbd_negotiate_handle_info(NBDClient *client, Error **errp)
* tolerate all clients, regardless of alignments.
*/
if (client->opt == NBD_OPT_INFO && !blocksize &&
- blk_get_request_alignment(exp->blk) > 1) {
+ blk_get_request_alignment(exp->common.blk) > 1) {
return nbd_negotiate_send_rep_err(client,
NBD_REP_ERR_BLOCK_SIZE_REQD,
errp,
@@ -1556,7 +1555,7 @@ int nbd_export_new(BlockExport *blk_exp, BlockDriverState *bs,
blk_set_allow_aio_context_change(blk, true);
QTAILQ_INIT(&exp->clients);
- exp->blk = blk;
+ exp->common.blk = blk;
exp->name = g_strdup(name);
assert(!desc || strlen(desc) <= NBD_MAX_STRING_SIZE);
exp->description = g_strdup(desc);
@@ -1679,15 +1678,13 @@ static void nbd_export_delete(BlockExport *blk_exp)
g_free(exp->description);
exp->description = NULL;
- if (exp->blk) {
+ if (exp->common.blk) {
if (exp->eject_notifier_blk) {
notifier_remove(&exp->eject_notifier);
blk_unref(exp->eject_notifier_blk);
}
- blk_remove_aio_context_notifier(exp->blk, blk_aio_attached,
+ blk_remove_aio_context_notifier(exp->common.blk, blk_aio_attached,
blk_aio_detach, exp);
- blk_unref(exp->blk);
- exp->blk = NULL;
}
if (exp->export_bitmap) {
@@ -1840,7 +1837,7 @@ static int coroutine_fn nbd_co_send_sparse_read(NBDClient *client,
while (progress < size) {
int64_t pnum;
- int status = bdrv_block_status_above(blk_bs(exp->blk), NULL,
+ int status = bdrv_block_status_above(blk_bs(exp->common.blk), NULL,
offset + progress,
size - progress, &pnum, NULL,
NULL);
@@ -1872,7 +1869,8 @@ static int coroutine_fn nbd_co_send_sparse_read(NBDClient *client,
stl_be_p(&chunk.length, pnum);
ret = nbd_co_send_iov(client, iov, 1, errp);
} else {
- ret = blk_pread(exp->blk, offset + progress, data + progress, pnum);
+ ret = blk_pread(exp->common.blk, offset + progress,
+ data + progress, pnum);
if (ret < 0) {
error_setg_errno(errp, -ret, "reading from file failed");
break;
@@ -2136,7 +2134,8 @@ static int nbd_co_receive_request(NBDRequestData *req, NBDRequest *request,
}
if (request->type != NBD_CMD_CACHE) {
- req->data = blk_try_blockalign(client->exp->blk, request->len);
+ req->data = blk_try_blockalign(client->exp->common.blk,
+ request->len);
if (req->data == NULL) {
error_setg(errp, "No memory");
return -ENOMEM;
@@ -2232,7 +2231,7 @@ static coroutine_fn int nbd_do_cmd_read(NBDClient *client, NBDRequest *request,
/* XXX: NBD Protocol only documents use of FUA with WRITE */
if (request->flags & NBD_CMD_FLAG_FUA) {
- ret = blk_co_flush(exp->blk);
+ ret = blk_co_flush(exp->common.blk);
if (ret < 0) {
return nbd_send_generic_reply(client, request->handle, ret,
"flush failed", errp);
@@ -2246,7 +2245,7 @@ static coroutine_fn int nbd_do_cmd_read(NBDClient *client, NBDRequest *request,
data, request->len, errp);
}
- ret = blk_pread(exp->blk, request->from, data, request->len);
+ ret = blk_pread(exp->common.blk, request->from, data, request->len);
if (ret < 0) {
return nbd_send_generic_reply(client, request->handle, ret,
"reading from file failed", errp);
@@ -2281,7 +2280,7 @@ static coroutine_fn int nbd_do_cmd_cache(NBDClient *client, NBDRequest *request,
assert(request->type == NBD_CMD_CACHE);
- ret = blk_co_preadv(exp->blk, request->from, request->len,
+ ret = blk_co_preadv(exp->common.blk, request->from, request->len,
NULL, BDRV_REQ_COPY_ON_READ | BDRV_REQ_PREFETCH);
return nbd_send_generic_reply(client, request->handle, ret,
@@ -2312,7 +2311,8 @@ static coroutine_fn int nbd_handle_request(NBDClient *client,
if (request->flags & NBD_CMD_FLAG_FUA) {
flags |= BDRV_REQ_FUA;
}
- ret = blk_pwrite(exp->blk, request->from, data, request->len, flags);
+ ret = blk_pwrite(exp->common.blk, request->from, data, request->len,
+ flags);
return nbd_send_generic_reply(client, request->handle, ret,
"writing to file failed", errp);
@@ -2327,7 +2327,8 @@ static coroutine_fn int nbd_handle_request(NBDClient *client,
if (request->flags & NBD_CMD_FLAG_FAST_ZERO) {
flags |= BDRV_REQ_NO_FALLBACK;
}
- ret = blk_pwrite_zeroes(exp->blk, request->from, request->len, flags);
+ ret = blk_pwrite_zeroes(exp->common.blk, request->from, request->len,
+ flags);
return nbd_send_generic_reply(client, request->handle, ret,
"writing to file failed", errp);
@@ -2336,14 +2337,14 @@ static coroutine_fn int nbd_handle_request(NBDClient *client,
abort();
case NBD_CMD_FLUSH:
- ret = blk_co_flush(exp->blk);
+ ret = blk_co_flush(exp->common.blk);
return nbd_send_generic_reply(client, request->handle, ret,
"flush failed", errp);
case NBD_CMD_TRIM:
- ret = blk_co_pdiscard(exp->blk, request->from, request->len);
+ ret = blk_co_pdiscard(exp->common.blk, request->from, request->len);
if (ret == 0 && request->flags & NBD_CMD_FLAG_FUA) {
- ret = blk_co_flush(exp->blk);
+ ret = blk_co_flush(exp->common.blk);
}
return nbd_send_generic_reply(client, request->handle, ret,
"discard failed", errp);
@@ -2361,7 +2362,8 @@ static coroutine_fn int nbd_handle_request(NBDClient *client,
if (client->export_meta.base_allocation) {
ret = nbd_co_send_block_status(client, request->handle,
- blk_bs(exp->blk), request->from,
+ blk_bs(exp->common.blk),
+ request->from,
request->len, dont_fragment,
!client->export_meta.bitmap,
NBD_META_ID_BASE_ALLOCATION,
Every block export has a BlockBackend representing the disk that is exported. It should live in BlockExport therefore. Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- include/block/export.h | 3 +++ block/export/export.c | 3 +++ nbd/server.c | 44 ++++++++++++++++++++++-------------------- 3 files changed, 29 insertions(+), 21 deletions(-)