diff options
| author | Max Reitz <mreitz@redhat.com> | 2019-09-18 11:51:41 +0200 |
|---|---|---|
| committer | Max Reitz <mreitz@redhat.com> | 2019-10-28 12:05:24 +0100 |
| commit | 82325ae5f2f86ad696db3d66563a078daabc9769 (patch) | |
| tree | 6d767f100da50b850abcf17357dbc6da3f419827 /block/iscsi.c | |
| parent | c80d8b06cfa59f5d8229379c85dcb2c3bb9c881b (diff) | |
block: Evaluate @exact in protocol drivers
We have two protocol drivers that return success when trying to shrink a
block device even though they cannot shrink it. This behavior is now
only allowed with exact=false, so they should return an error with
exact=true.
Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-id: 20190918095144.955-6-mreitz@redhat.com
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
Diffstat (limited to 'block/iscsi.c')
| -rw-r--r-- | block/iscsi.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/block/iscsi.c b/block/iscsi.c index 677946cf09..2aea7e3f13 100644 --- a/block/iscsi.c +++ b/block/iscsi.c @@ -2127,6 +2127,7 @@ static int coroutine_fn iscsi_co_truncate(BlockDriverState *bs, int64_t offset, Error **errp) { IscsiLun *iscsilun = bs->opaque; + int64_t cur_length; Error *local_err = NULL; if (prealloc != PREALLOC_MODE_OFF) { @@ -2146,7 +2147,11 @@ static int coroutine_fn iscsi_co_truncate(BlockDriverState *bs, int64_t offset, return -EIO; } - if (offset > iscsi_getlength(bs)) { + cur_length = iscsi_getlength(bs); + if (offset != cur_length && exact) { + error_setg(errp, "Cannot resize iSCSI devices"); + return -ENOTSUP; + } else if (offset > cur_length) { error_setg(errp, "Cannot grow iSCSI devices"); return -EINVAL; } |