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| author | Alvaro Karsz <alvaro.karsz@solid-run.com> | 2022-09-21 11:27:29 +0300 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2022-10-07 09:32:41 -0400 |
| commit | e60d64074214db7207fc13c25ee39d8d47cb4a34 (patch) | |
| tree | 3e81886cd2f96bbf3828d8515aa1db09032ca3aa /include/uapi | |
| parent | c1ca352d371f724f7fb40f016abdb563aa85fe55 (diff) | |
| download | lwn-e60d64074214db7207fc13c25ee39d8d47cb4a34.tar.gz lwn-e60d64074214db7207fc13c25ee39d8d47cb4a34.zip | |
virtio_blk: add SECURE ERASE command support
Support for the VIRTIO_BLK_F_SECURE_ERASE VirtIO feature.
A device that offers this feature can receive VIRTIO_BLK_T_SECURE_ERASE
commands.
A device which supports this feature has the following fields in the
virtio config:
- max_secure_erase_sectors
- max_secure_erase_seg
- secure_erase_sector_alignment
max_secure_erase_sectors and secure_erase_sector_alignment are expressed
in 512-byte units.
Every secure erase command has the following fields:
- sectors: The starting offset in 512-byte units.
- num_sectors: The number of sectors.
Signed-off-by: Alvaro Karsz <alvaro.karsz@solid-run.com>
Message-Id: <20220921082729.2516779-1-alvaro.karsz@solid-run.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'include/uapi')
| -rw-r--r-- | include/uapi/linux/virtio_blk.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/include/uapi/linux/virtio_blk.h b/include/uapi/linux/virtio_blk.h index d888f013d9ff..58e70b24b504 100644 --- a/include/uapi/linux/virtio_blk.h +++ b/include/uapi/linux/virtio_blk.h @@ -40,6 +40,7 @@ #define VIRTIO_BLK_F_MQ 12 /* support more than one vq */ #define VIRTIO_BLK_F_DISCARD 13 /* DISCARD is supported */ #define VIRTIO_BLK_F_WRITE_ZEROES 14 /* WRITE ZEROES is supported */ +#define VIRTIO_BLK_F_SECURE_ERASE 16 /* Secure Erase is supported */ /* Legacy feature bits */ #ifndef VIRTIO_BLK_NO_LEGACY @@ -121,6 +122,21 @@ struct virtio_blk_config { __u8 write_zeroes_may_unmap; __u8 unused1[3]; + + /* the next 3 entries are guarded by VIRTIO_BLK_F_SECURE_ERASE */ + /* + * The maximum secure erase sectors (in 512-byte sectors) for + * one segment. + */ + __virtio32 max_secure_erase_sectors; + /* + * The maximum number of secure erase segments in a + * secure erase command. + */ + __virtio32 max_secure_erase_seg; + /* Secure erase commands must be aligned to this number of sectors. */ + __virtio32 secure_erase_sector_alignment; + } __attribute__((packed)); /* @@ -155,6 +171,9 @@ struct virtio_blk_config { /* Write zeroes command */ #define VIRTIO_BLK_T_WRITE_ZEROES 13 +/* Secure erase command */ +#define VIRTIO_BLK_T_SECURE_ERASE 14 + #ifndef VIRTIO_BLK_NO_LEGACY /* Barrier before this op. */ #define VIRTIO_BLK_T_BARRIER 0x80000000 |