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block: sed-opal: Add support to read/write opal tables generically

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This feature gives the user RW access to any opal table with admin1
authority. The flags described in the new structure determines if the user
wants to read/write the data. Flags are checked for valid values in
order to allow future features to be added to the ioctl.

The user can provide the desired table's UID. Also, the ioctl provides a
size and offset field and internally will loop data accesses to return
the full data block. Read overrun is prevented by the initiator's
sec_send_recv() backend. The ioctl provides a private field with the
intention to accommodate any future expansions to the ioctl.

Reviewed-by: Scott Bauer <sbauer@plzdonthack.me>
Reviewed-by: Jon Derrick <jonathan.derrick@intel.com>
Signed-off-by: Revanth Rajashekar <revanth.rajashekar@intel.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Revanth Rajashekar
2019-10-31 10:13:21 -06:00
committed by Jens Axboe
parent 3495ea1b5f
commit 51f421c85c
4 changed files with 193 additions and 1 deletions
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20
include/uapi/linux/sed-opal.h
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@@ -113,6 +113,25 @@ struct opal_shadow_mbr {
__u64 size;
};
/* Opal table operations */
enum opal_table_ops {
OPAL_READ_TABLE,
OPAL_WRITE_TABLE,
};
#define OPAL_UID_LENGTH 8
struct opal_read_write_table {
struct opal_key key;
const __u64 data;
const __u8 table_uid[OPAL_UID_LENGTH];
__u64 offset;
__u64 size;
#define OPAL_TABLE_READ (1 << OPAL_READ_TABLE)
#define OPAL_TABLE_WRITE (1 << OPAL_WRITE_TABLE)
__u64 flags;
__u64 priv;
};
#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)
@@ -128,5 +147,6 @@ struct opal_shadow_mbr {
#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)
#define IOC_OPAL_GENERIC_TABLE_RW _IOW('p', 235, struct opal_read_write_table)
#endif /* _UAPI_SED_OPAL_H */