diff options
| -rw-r--r-- | blockdev-nbd.c | 2 | ||||
| -rw-r--r-- | docs/interop/nbd.txt | 1 | ||||
| -rw-r--r-- | include/block/nbd.h | 2 | ||||
| -rw-r--r-- | nbd/server.c | 4 | ||||
| -rw-r--r-- | qemu-nbd.c | 2 | ||||
| -rw-r--r-- | tests/qemu-iotests/223.out | 2 |
6 files changed, 8 insertions, 5 deletions
diff --git a/blockdev-nbd.c b/blockdev-nbd.c index c621686131..1fcfdb0997 100644 --- a/blockdev-nbd.c +++ b/blockdev-nbd.c @@ -188,7 +188,7 @@ void qmp_nbd_server_add(const char *device, bool has_name, const char *name, } exp = nbd_export_new(bs, 0, len, name, NULL, bitmap, - writable ? 0 : NBD_FLAG_READ_ONLY, + writable ? 0 : NBD_FLAG_READ_ONLY, !writable, NULL, false, on_eject_blk, errp); if (!exp) { return; diff --git a/docs/interop/nbd.txt b/docs/interop/nbd.txt index fc64473e02..6dfec7f476 100644 --- a/docs/interop/nbd.txt +++ b/docs/interop/nbd.txt @@ -53,3 +53,4 @@ the operation of that feature. * 2.12: NBD_CMD_BLOCK_STATUS for "base:allocation" * 3.0: NBD_OPT_STARTTLS with TLS Pre-Shared Keys (PSK), NBD_CMD_BLOCK_STATUS for "qemu:dirty-bitmap:", NBD_CMD_CACHE +* 4.2: NBD_FLAG_CAN_MULTI_CONN for sharable read-only exports diff --git a/include/block/nbd.h b/include/block/nbd.h index 7b36d672f0..991fd52a51 100644 --- a/include/block/nbd.h +++ b/include/block/nbd.h @@ -326,7 +326,7 @@ typedef struct NBDClient NBDClient; NBDExport *nbd_export_new(BlockDriverState *bs, uint64_t dev_offset, uint64_t size, const char *name, const char *desc, - const char *bitmap, uint16_t nbdflags, + const char *bitmap, uint16_t nbdflags, bool shared, void (*close)(NBDExport *), bool writethrough, BlockBackend *on_eject_blk, Error **errp); void nbd_export_close(NBDExport *exp); diff --git a/nbd/server.c b/nbd/server.c index f55ccf8edf..0fb41c6c50 100644 --- a/nbd/server.c +++ b/nbd/server.c @@ -1461,7 +1461,7 @@ static void nbd_eject_notifier(Notifier *n, void *data) NBDExport *nbd_export_new(BlockDriverState *bs, uint64_t dev_offset, uint64_t size, const char *name, const char *desc, - const char *bitmap, uint16_t nbdflags, + const char *bitmap, uint16_t nbdflags, bool shared, void (*close)(NBDExport *), bool writethrough, BlockBackend *on_eject_blk, Error **errp) { @@ -1487,6 +1487,8 @@ NBDExport *nbd_export_new(BlockDriverState *bs, uint64_t dev_offset, perm = BLK_PERM_CONSISTENT_READ; if ((nbdflags & NBD_FLAG_READ_ONLY) == 0) { perm |= BLK_PERM_WRITE; + } else if (shared) { + nbdflags |= NBD_FLAG_CAN_MULTI_CONN; } blk = blk_new(bdrv_get_aio_context(bs), perm, BLK_PERM_CONSISTENT_READ | BLK_PERM_WRITE_UNCHANGED | diff --git a/qemu-nbd.c b/qemu-nbd.c index 83b6c32d73..2403ef3d0f 100644 --- a/qemu-nbd.c +++ b/qemu-nbd.c @@ -1173,7 +1173,7 @@ int main(int argc, char **argv) } export = nbd_export_new(bs, dev_offset, fd_size, export_name, - export_description, bitmap, nbdflags, + export_description, bitmap, nbdflags, shared > 1, nbd_export_closed, writethrough, NULL, &error_fatal); diff --git a/tests/qemu-iotests/223.out b/tests/qemu-iotests/223.out index d5201b2356..2bca28ae72 100644 --- a/tests/qemu-iotests/223.out +++ b/tests/qemu-iotests/223.out @@ -40,7 +40,7 @@ exports available: 0 exports available: 2 export: 'n' size: 4194304 - flags: 0x4ef ( readonly flush fua trim zeroes df cache ) + flags: 0x5ef ( readonly flush fua trim zeroes df multi cache ) min block: 1 opt block: 4096 max block: 33554432 |