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block: sed-opal: ioctl for writing to shadow mbr

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Allow modification of the shadow mbr. If the shadow mbr is not marked as
done, this data will be presented read only as the device content. Only
after marking the shadow mbr as done and unlocking a locking range the
actual content is accessible.

Co-authored-by: David Kozub <zub@linux.fjfi.cvut.cz>
Signed-off-by: Jonas Rabenstein <jonas.rabenstein@studium.uni-erlangen.de>
Signed-off-by: David Kozub <zub@linux.fjfi.cvut.cz>
Reviewed-by: Scott Bauer <sbauer@plzdonthack.me>
Reviewed-by: Jon Derrick <jonathan.derrick@intel.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jonas Rabenstein 2019-05-21 22:46:45 +02:00 • committed by Jens Axboe
parent c988844341
commit a9b25b4cf2
3 changed files with 98 additions and 2 deletions
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8
include/uapi/linux/sed-opal.h
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@ -106,6 +106,13 @@ struct opal_mbr_done {
__u8 __align[7];
};
struct opal_shadow_mbr {
struct opal_key key;
const __u64 data;
__u64 offset;
__u64 size;
};
#define IOC_OPAL_SAVE _IOW('p', 220, struct opal_lock_unlock)
#define IOC_OPAL_LOCK_UNLOCK _IOW('p', 221, struct opal_lock_unlock)
#define IOC_OPAL_TAKE_OWNERSHIP _IOW('p', 222, struct opal_key)
@ -120,5 +127,6 @@ struct opal_mbr_done {
#define IOC_OPAL_SECURE_ERASE_LR _IOW('p', 231, struct opal_session_info)
#define IOC_OPAL_PSID_REVERT_TPR _IOW('p', 232, struct opal_key)
#define IOC_OPAL_MBR_DONE _IOW('p', 233, struct opal_mbr_done)
#define IOC_OPAL_WRITE_SHADOW_MBR _IOW('p', 234, struct opal_shadow_mbr)
#endif /* _UAPI_SED_OPAL_H */