diff options
| author | Max Reitz <mreitz@redhat.com> | 2018-02-13 14:03:56 +0100 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2018-02-13 16:18:41 +0100 |
| commit | 74f1eabf9cbdd168f0aceae97a0f6645d1ce7ebd (patch) | |
| tree | 66564049067b2f18a8b1728140ae2bc04c478a53 /block/sheepdog.c | |
| parent | 1a62baf62bdc30ec4856ac569cefb9d831808253 (diff) | |
sheepdog: Allow fully preallocated truncation
Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'block/sheepdog.c')
| -rw-r--r-- | block/sheepdog.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/block/sheepdog.c b/block/sheepdog.c index d300fb69c0..ac02b10fe0 100644 --- a/block/sheepdog.c +++ b/block/sheepdog.c @@ -2180,15 +2180,16 @@ static int sd_truncate(BlockDriverState *bs, int64_t offset, int ret, fd; unsigned int datalen; uint64_t max_vdi_size; + int64_t old_size = s->inode.vdi_size; - if (prealloc != PREALLOC_MODE_OFF) { + if (prealloc != PREALLOC_MODE_OFF && prealloc != PREALLOC_MODE_FULL) { error_setg(errp, "Unsupported preallocation mode '%s'", PreallocMode_str(prealloc)); return -ENOTSUP; } max_vdi_size = (UINT64_C(1) << s->inode.block_size_shift) * MAX_DATA_OBJS; - if (offset < s->inode.vdi_size) { + if (offset < old_size) { error_setg(errp, "shrinking is not supported"); return -EINVAL; } else if (offset > max_vdi_size) { @@ -2211,9 +2212,17 @@ static int sd_truncate(BlockDriverState *bs, int64_t offset, if (ret < 0) { error_setg_errno(errp, -ret, "failed to update an inode"); + return ret; } - return ret; + if (prealloc == PREALLOC_MODE_FULL) { + ret = sd_prealloc(bs, old_size, offset, errp); + if (ret < 0) { + return ret; + } + } + + return 0; } /* |