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| author | Alberto Garcia <berto@igalia.com> | 2018-02-05 16:33:31 +0200 |
|---|---|---|
| committer | Max Reitz <mreitz@redhat.com> | 2018-02-13 17:00:00 +0100 |
| commit | 13bec229d848d22fceb3f0f1bbf01e1f7bcac7a1 (patch) | |
| tree | 2352a01c432d49ec2dd9e657cf7f977e4d231f1b | |
| parent | 415184f52031cd16ff7ea3702e0ef9f2f7edec9a (diff) | |
| download | focaccia-qemu-13bec229d848d22fceb3f0f1bbf01e1f7bcac7a1.tar.gz focaccia-qemu-13bec229d848d22fceb3f0f1bbf01e1f7bcac7a1.zip | |
qcow2: Update qcow2_truncate() to support L2 slices
The qcow2_truncate() code is mostly independent from whether we're using L2 slices or full L2 tables, but in full and falloc preallocation modes new L2 tables are allocated using qcow2_alloc_cluster_link_l2(). Therefore the code needs to be modified to ensure that all nb_clusters that are processed in each call can be allocated with just one L2 slice. Signed-off-by: Alberto Garcia <berto@igalia.com> Message-id: 1fd7d272b5e7b66254a090b74cf2bed1cc334c0e.1517840877.git.berto@igalia.com Reviewed-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com>
Diffstat (limited to '')
| -rw-r--r-- | block/qcow2.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/block/qcow2.c b/block/qcow2.c index ba8d71c72d..953254a004 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -3262,9 +3262,9 @@ static int qcow2_truncate(BlockDriverState *bs, int64_t offset, host_offset = allocation_start; guest_offset = old_length; while (nb_new_data_clusters) { - int64_t guest_cluster = guest_offset >> s->cluster_bits; - int64_t nb_clusters = MIN(nb_new_data_clusters, - s->l2_size - guest_cluster % s->l2_size); + int64_t nb_clusters = MIN( + nb_new_data_clusters, + s->l2_slice_size - offset_to_l2_slice_index(s, guest_offset)); QCowL2Meta allocation = { .offset = guest_offset, .alloc_offset = host_offset, |