diff options
| author | Kevin Wolf <kwolf@redhat.com> | 2020-04-24 14:54:39 +0200 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2020-04-30 17:51:07 +0200 |
| commit | 92b92799dc8662b6f71809100a4aabc1ae408ebb (patch) | |
| tree | 3f1ac86ecb305c8ed56ba752fc92832b314b6894 /block/io.c | |
| parent | 3fb61087074474b088fee23bb81ffd258cb9cb2a (diff) | |
block: Add flags to BlockDriver.bdrv_co_truncate()
This adds a new BdrvRequestFlags parameter to the .bdrv_co_truncate()
driver callbacks, and a supported_truncate_flags field in
BlockDriverState that allows drivers to advertise support for request
flags in the context of truncate.
For now, we always pass 0 and no drivers declare support for any flag.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20200424125448.63318-2-kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'block/io.c')
| -rw-r--r-- | block/io.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/block/io.c b/block/io.c index aba67f66b9..04ac5cf023 100644 --- a/block/io.c +++ b/block/io.c @@ -3344,6 +3344,7 @@ int coroutine_fn bdrv_co_truncate(BdrvChild *child, int64_t offset, bool exact, BlockDriverState *bs = child->bs; BlockDriver *drv = bs->drv; BdrvTrackedRequest req; + BdrvRequestFlags flags = 0; int64_t old_size, new_bytes; int ret; @@ -3394,7 +3395,12 @@ int coroutine_fn bdrv_co_truncate(BdrvChild *child, int64_t offset, bool exact, } if (drv->bdrv_co_truncate) { - ret = drv->bdrv_co_truncate(bs, offset, exact, prealloc, errp); + if (flags & ~bs->supported_truncate_flags) { + error_setg(errp, "Block driver does not support requested flags"); + ret = -ENOTSUP; + goto out; + } + ret = drv->bdrv_co_truncate(bs, offset, exact, prealloc, flags, errp); } else if (bs->file && drv->is_filter) { ret = bdrv_co_truncate(bs->file, offset, exact, prealloc, errp); } else { |