Add a PreallocMode parameter to the bdrv_truncate() function implemented by each block driver. Currently, we always pass PREALLOC_MODE_OFF and no driver accepts anything else.
Signed-off-by: Max Reitz <mre...@redhat.com> Reviewed-by: Stefan Hajnoczi <stefa...@redhat.com> --- include/block/block_int.h | 3 ++- block.c | 2 +- block/blkdebug.c | 9 ++++++++- block/crypto.c | 8 +++++++- block/file-posix.c | 9 ++++++++- block/file-win32.c | 9 ++++++++- block/gluster.c | 8 +++++++- block/iscsi.c | 9 ++++++++- block/nfs.c | 9 ++++++++- block/qcow2.c | 9 ++++++++- block/qed.c | 9 ++++++++- block/raw-format.c | 9 ++++++++- block/rbd.c | 9 ++++++++- block/sheepdog.c | 11 +++++++++-- 14 files changed, 98 insertions(+), 15 deletions(-) diff --git a/include/block/block_int.h b/include/block/block_int.h index 8a423c9..d6cdbd8 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -203,7 +203,8 @@ struct BlockDriver { int coroutine_fn (*bdrv_co_flush_to_os)(BlockDriverState *bs); const char *protocol_name; - int (*bdrv_truncate)(BlockDriverState *bs, int64_t offset, Error **errp); + int (*bdrv_truncate)(BlockDriverState *bs, int64_t offset, + PreallocMode prealloc, Error **errp); int64_t (*bdrv_getlength)(BlockDriverState *bs); bool has_variable_length; diff --git a/block.c b/block.c index 67a8bfc..0d8fe01 100644 --- a/block.c +++ b/block.c @@ -3377,7 +3377,7 @@ int bdrv_truncate(BdrvChild *child, int64_t offset, Error **errp) assert(!(bs->open_flags & BDRV_O_INACTIVE)); - ret = drv->bdrv_truncate(bs, offset, errp); + ret = drv->bdrv_truncate(bs, offset, PREALLOC_MODE_OFF, errp); if (ret == 0) { ret = refresh_total_sectors(bs, offset >> BDRV_SECTOR_BITS); bdrv_dirty_bitmap_truncate(bs); diff --git a/block/blkdebug.c b/block/blkdebug.c index a5196e8..00090aa 100644 --- a/block/blkdebug.c +++ b/block/blkdebug.c @@ -812,8 +812,15 @@ static int64_t blkdebug_getlength(BlockDriverState *bs) return bdrv_getlength(bs->file->bs); } -static int blkdebug_truncate(BlockDriverState *bs, int64_t offset, Error **errp) +static int blkdebug_truncate(BlockDriverState *bs, int64_t offset, + PreallocMode prealloc, Error **errp) { + if (prealloc != PREALLOC_MODE_OFF) { + error_setg(errp, "Unsupported preallocation mode '%s'", + PreallocMode_lookup[prealloc]); + return -ENOTSUP; + } + return bdrv_truncate(bs->file, offset, errp); } diff --git a/block/crypto.c b/block/crypto.c index 10e5ddc..7047cb2 100644 --- a/block/crypto.c +++ b/block/crypto.c @@ -382,12 +382,18 @@ static int block_crypto_create_generic(QCryptoBlockFormat format, } static int block_crypto_truncate(BlockDriverState *bs, int64_t offset, - Error **errp) + PreallocMode prealloc, Error **errp) { BlockCrypto *crypto = bs->opaque; size_t payload_offset = qcrypto_block_get_payload_offset(crypto->block); + if (prealloc != PREALLOC_MODE_OFF) { + error_setg(errp, "Unsupported preallocation mode '%s'", + PreallocMode_lookup[prealloc]); + return -ENOTSUP; + } + offset += payload_offset; return bdrv_truncate(bs->file, offset, errp); diff --git a/block/file-posix.c b/block/file-posix.c index 4354d49..7cc6bf6 100644 --- a/block/file-posix.c +++ b/block/file-posix.c @@ -1629,12 +1629,19 @@ static void raw_close(BlockDriverState *bs) } } -static int raw_truncate(BlockDriverState *bs, int64_t offset, Error **errp) +static int raw_truncate(BlockDriverState *bs, int64_t offset, + PreallocMode prealloc, Error **errp) { BDRVRawState *s = bs->opaque; struct stat st; int ret; + if (prealloc != PREALLOC_MODE_OFF) { + error_setg(errp, "Unsupported preallocation mode '%s'", + PreallocMode_lookup[prealloc]); + return -ENOTSUP; + } + if (fstat(s->fd, &st)) { ret = -errno; error_setg_errno(errp, -ret, "Failed to fstat() the file"); diff --git a/block/file-win32.c b/block/file-win32.c index 8f14f0b..707fb53 100644 --- a/block/file-win32.c +++ b/block/file-win32.c @@ -466,12 +466,19 @@ static void raw_close(BlockDriverState *bs) } } -static int raw_truncate(BlockDriverState *bs, int64_t offset, Error **errp) +static int raw_truncate(BlockDriverState *bs, int64_t offset, + PreallocMode prealloc, Error **errp) { BDRVRawState *s = bs->opaque; LONG low, high; DWORD dwPtrLow; + if (prealloc != PREALLOC_MODE_OFF) { + error_setg(errp, "Unsupported preallocation mode '%s'", + PreallocMode_lookup[prealloc]); + return -ENOTSUP; + } + low = offset; high = offset >> 32; diff --git a/block/gluster.c b/block/gluster.c index 7c76cd0..e673d6c 100644 --- a/block/gluster.c +++ b/block/gluster.c @@ -1093,11 +1093,17 @@ static coroutine_fn int qemu_gluster_co_rw(BlockDriverState *bs, } static int qemu_gluster_truncate(BlockDriverState *bs, int64_t offset, - Error **errp) + PreallocMode prealloc, Error **errp) { int ret; BDRVGlusterState *s = bs->opaque; + if (prealloc != PREALLOC_MODE_OFF) { + error_setg(errp, "Unsupported preallocation mode '%s'", + PreallocMode_lookup[prealloc]); + return -ENOTSUP; + } + ret = glfs_ftruncate(s->fd, offset); if (ret < 0) { ret = -errno; diff --git a/block/iscsi.c b/block/iscsi.c index 5daa201..61d5792 100644 --- a/block/iscsi.c +++ b/block/iscsi.c @@ -2059,11 +2059,18 @@ static void iscsi_reopen_commit(BDRVReopenState *reopen_state) } } -static int iscsi_truncate(BlockDriverState *bs, int64_t offset, Error **errp) +static int iscsi_truncate(BlockDriverState *bs, int64_t offset, + PreallocMode prealloc, Error **errp) { IscsiLun *iscsilun = bs->opaque; Error *local_err = NULL; + if (prealloc != PREALLOC_MODE_OFF) { + error_setg(errp, "Unsupported preallocation mode '%s'", + PreallocMode_lookup[prealloc]); + return -ENOTSUP; + } + if (iscsilun->type != TYPE_DISK) { error_setg(errp, "Cannot resize non-disk iSCSI devices"); return -ENOTSUP; diff --git a/block/nfs.c b/block/nfs.c index 848b2c0..be6073a 100644 --- a/block/nfs.c +++ b/block/nfs.c @@ -758,11 +758,18 @@ static int64_t nfs_get_allocated_file_size(BlockDriverState *bs) return (task.ret < 0 ? task.ret : st.st_blocks * 512); } -static int nfs_file_truncate(BlockDriverState *bs, int64_t offset, Error **errp) +static int nfs_file_truncate(BlockDriverState *bs, int64_t offset, + PreallocMode prealloc, Error **errp) { NFSClient *client = bs->opaque; int ret; + if (prealloc != PREALLOC_MODE_OFF) { + error_setg(errp, "Unsupported preallocation mode '%s'", + PreallocMode_lookup[prealloc]); + return -ENOTSUP; + } + ret = nfs_ftruncate(client->context, client->fh, offset); if (ret < 0) { error_setg_errno(errp, -ret, "Failed to truncate file"); diff --git a/block/qcow2.c b/block/qcow2.c index b69c88d..ed663c5 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -2597,12 +2597,19 @@ static coroutine_fn int qcow2_co_pdiscard(BlockDriverState *bs, return ret; } -static int qcow2_truncate(BlockDriverState *bs, int64_t offset, Error **errp) +static int qcow2_truncate(BlockDriverState *bs, int64_t offset, + PreallocMode prealloc, Error **errp) { BDRVQcow2State *s = bs->opaque; int64_t new_l1_size; int ret; + if (prealloc != PREALLOC_MODE_OFF) { + error_setg(errp, "Unsupported preallocation mode '%s'", + PreallocMode_lookup[prealloc]); + return -ENOTSUP; + } + if (offset & 511) { error_setg(errp, "The new size must be a multiple of 512"); return -EINVAL; diff --git a/block/qed.c b/block/qed.c index fd76817..6d460ce 100644 --- a/block/qed.c +++ b/block/qed.c @@ -1518,12 +1518,19 @@ static int coroutine_fn bdrv_qed_co_pwrite_zeroes(BlockDriverState *bs, return cb.ret; } -static int bdrv_qed_truncate(BlockDriverState *bs, int64_t offset, Error **errp) +static int bdrv_qed_truncate(BlockDriverState *bs, int64_t offset, + PreallocMode prealloc, Error **errp) { BDRVQEDState *s = bs->opaque; uint64_t old_image_size; int ret; + if (prealloc != PREALLOC_MODE_OFF) { + error_setg(errp, "Unsupported preallocation mode '%s'", + PreallocMode_lookup[prealloc]); + return -ENOTSUP; + } + if (!qed_is_image_size_valid(offset, s->header.cluster_size, s->header.table_size)) { error_setg(errp, "Invalid image size specified"); diff --git a/block/raw-format.c b/block/raw-format.c index ac7453e..20134cb 100644 --- a/block/raw-format.c +++ b/block/raw-format.c @@ -352,10 +352,17 @@ static void raw_refresh_limits(BlockDriverState *bs, Error **errp) } } -static int raw_truncate(BlockDriverState *bs, int64_t offset, Error **errp) +static int raw_truncate(BlockDriverState *bs, int64_t offset, + PreallocMode prealloc, Error **errp) { BDRVRawState *s = bs->opaque; + if (prealloc != PREALLOC_MODE_OFF) { + error_setg(errp, "Unsupported preallocation mode '%s'", + PreallocMode_lookup[prealloc]); + return -ENOTSUP; + } + if (s->has_size) { error_setg(errp, "Cannot resize fixed-size raw disks"); return -ENOTSUP; diff --git a/block/rbd.c b/block/rbd.c index e551639..4b3fadb 100644 --- a/block/rbd.c +++ b/block/rbd.c @@ -916,11 +916,18 @@ static int64_t qemu_rbd_getlength(BlockDriverState *bs) return info.size; } -static int qemu_rbd_truncate(BlockDriverState *bs, int64_t offset, Error **errp) +static int qemu_rbd_truncate(BlockDriverState *bs, int64_t offset, + PreallocMode prealloc, Error **errp) { BDRVRBDState *s = bs->opaque; int r; + if (prealloc != PREALLOC_MODE_OFF) { + error_setg(errp, "Unsupported preallocation mode '%s'", + PreallocMode_lookup[prealloc]); + return -ENOTSUP; + } + r = rbd_resize(s->image, offset); if (r < 0) { error_setg_errno(errp, -r, "Failed to resize file"); diff --git a/block/sheepdog.c b/block/sheepdog.c index a18315a..e3e4ad5 100644 --- a/block/sheepdog.c +++ b/block/sheepdog.c @@ -2153,13 +2153,20 @@ static int64_t sd_getlength(BlockDriverState *bs) return s->inode.vdi_size; } -static int sd_truncate(BlockDriverState *bs, int64_t offset, Error **errp) +static int sd_truncate(BlockDriverState *bs, int64_t offset, + PreallocMode prealloc, Error **errp) { BDRVSheepdogState *s = bs->opaque; int ret, fd; unsigned int datalen; uint64_t max_vdi_size; + if (prealloc != PREALLOC_MODE_OFF) { + error_setg(errp, "Unsupported preallocation mode '%s'", + PreallocMode_lookup[prealloc]); + return -ENOTSUP; + } + max_vdi_size = (UINT64_C(1) << s->inode.block_size_shift) * MAX_DATA_OBJS; if (offset < s->inode.vdi_size) { error_setg(errp, "shrinking is not supported"); @@ -2448,7 +2455,7 @@ static coroutine_fn int sd_co_writev(BlockDriverState *bs, int64_t sector_num, BDRVSheepdogState *s = bs->opaque; if (offset > s->inode.vdi_size) { - ret = sd_truncate(bs, offset, NULL); + ret = sd_truncate(bs, offset, PREALLOC_MODE_OFF, NULL); if (ret < 0) { return ret; } -- 2.9.4