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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2022-03-24 22:30:37 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2022-03-24 22:30:37 +0300 |
| commit | 66711cfea642a162bc99abdefe1645b26dbd778f (patch) | |
| tree | 9f158a0577dc8375a8a5835441c592919bb628ea /include/uapi | |
| parent | 1ebdbeb03efe89f01f15df038a589077df3d21f5 (diff) | |
| parent | eeda29db98f429a3b6473117e6ce1c213ab614f2 (diff) | |
| download | linux-66711cfea642a162bc99abdefe1645b26dbd778f.tar.xz | |
Merge tag 'hyperv-next-signed-20220322' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux
Pull hyperv updates from Wei Liu:
"Minor patches from various people"
* tag 'hyperv-next-signed-20220322' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux:
x86/hyperv: Output host build info as normal Windows version number
hv_balloon: rate-limit "Unhandled message" warning
drivers: hv: log when enabling crash_kexec_post_notifiers
hv_utils: Add comment about max VMbus packet size in VSS driver
Drivers: hv: Compare cpumasks and not their weights in init_vp_index()
Drivers: hv: Rename 'alloced' to 'allocated'
Drivers: hv: vmbus: Use struct_size() helper in kmalloc()
Diffstat (limited to 'include/uapi')
| -rw-r--r-- | include/uapi/linux/hyperv.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/uapi/linux/hyperv.h b/include/uapi/linux/hyperv.h index daf82a230c0e..aaa502a7bff4 100644 --- a/include/uapi/linux/hyperv.h +++ b/include/uapi/linux/hyperv.h @@ -90,6 +90,17 @@ struct hv_vss_check_dm_info { __u32 flags; } __attribute__((packed)); +/* + * struct hv_vss_msg encodes the fields that the Linux VSS + * driver accesses. However, FREEZE messages from Hyper-V contain + * additional LUN information that Linux doesn't use and are not + * represented in struct hv_vss_msg. A received FREEZE message may + * be as large as 6,260 bytes, so the driver must allocate at least + * that much space, not sizeof(struct hv_vss_msg). Other messages + * such as AUTO_RECOVER may be as large as 12,500 bytes. However, + * because the Linux VSS driver responds that it doesn't support + * auto-recovery, it should not receive such messages. + */ struct hv_vss_msg { union { struct hv_vss_hdr vss_hdr; |