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-rw-r--r--block/sed-opal.c159
-rw-r--r--include/linux/sed-opal.h1
-rw-r--r--include/uapi/linux/sed-opal.h13
3 files changed, 173 insertions, 0 deletions
diff --git a/block/sed-opal.c b/block/sed-opal.c
index 6146a1b30421..c34d19e91201 100644
--- a/block/sed-opal.c
+++ b/block/sed-opal.c
@@ -1757,6 +1757,12 @@ static int start_anybodyASP_opal_session(struct opal_dev *dev, void *data)
OPAL_ADMINSP_UID, NULL, 0);
}
+static int start_anybodyLSP_opal_session(struct opal_dev *dev, void *data)
+{
+ return start_generic_opal_session(dev, OPAL_ANYBODY_UID,
+ OPAL_LOCKINGSP_UID, NULL, 0);
+}
+
static int start_SIDASP_opal_session(struct opal_dev *dev, void *data)
{
int ret;
@@ -3389,6 +3395,156 @@ static int opal_get_geometry(struct opal_dev *dev, void __user *data)
return 0;
}
+static int get_sum_ranges(struct opal_dev *dev, void *data)
+{
+ const char *lr_uid;
+ size_t lr_uid_len;
+ u64 val;
+ const struct opal_resp_tok *tok;
+ int err, tok_n = 2;
+ struct opal_sum_ranges *sranges = data;
+ const __u8 lr_all[OPAL_MAX_LRS] = { 0, 1, 2, 3, 4, 5, 6, 7, 8 };
+
+ err = generic_get_columns(dev, opaluid[OPAL_LOCKING_INFO_TABLE], OPAL_SUM_SET_LIST,
+ OPAL_SUM_RANGE_POLICY);
+ if (err) {
+ pr_debug("Couldn't get locking info table columns %d to %d.\n",
+ OPAL_SUM_SET_LIST, OPAL_SUM_RANGE_POLICY);
+ return err;
+ }
+
+ tok = response_get_token(&dev->parsed, tok_n);
+ if (IS_ERR(tok))
+ return PTR_ERR(tok);
+
+ if (!response_token_matches(tok, OPAL_STARTNAME)) {
+ pr_debug("Unexpected response token type %d.\n", tok_n);
+ return OPAL_INVAL_PARAM;
+ }
+ tok_n++;
+
+ if (response_get_u64(&dev->parsed, tok_n) != OPAL_SUM_SET_LIST) {
+ pr_debug("Token %d does not match expected column %u.\n",
+ tok_n, OPAL_SUM_SET_LIST);
+ return OPAL_INVAL_PARAM;
+ }
+ tok_n++;
+
+ tok = response_get_token(&dev->parsed, tok_n);
+ if (IS_ERR(tok))
+ return PTR_ERR(tok);
+
+ /*
+ * The OPAL_SUM_SET_LIST response contains two distinct values:
+ *
+ * - the list of individual locking ranges (UIDs) put in SUM. The list
+ * may also be empty signaling the SUM is disabled.
+ *
+ * - the Locking table UID if the entire Locking table is put in SUM.
+ */
+ if (response_token_matches(tok, OPAL_STARTLIST)) {
+ sranges->num_lrs = 0;
+
+ tok_n++;
+ tok = response_get_token(&dev->parsed, tok_n);
+ if (IS_ERR(tok))
+ return PTR_ERR(tok);
+
+ while (!response_token_matches(tok, OPAL_ENDLIST)) {
+ lr_uid_len = response_get_string(&dev->parsed, tok_n, &lr_uid);
+ if (lr_uid_len != OPAL_UID_LENGTH) {
+ pr_debug("Unexpected response token type %d.\n", tok_n);
+ return OPAL_INVAL_PARAM;
+ }
+
+ if (memcmp(lr_uid, opaluid[OPAL_LOCKINGRANGE_GLOBAL], OPAL_UID_LENGTH)) {
+ if (lr_uid[5] != LOCKING_RANGE_NON_GLOBAL) {
+ pr_debug("Unexpected byte %d at LR UUID position 5.\n",
+ lr_uid[5]);
+ return OPAL_INVAL_PARAM;
+ }
+ sranges->lr[sranges->num_lrs++] = lr_uid[7];
+ } else
+ sranges->lr[sranges->num_lrs++] = 0;
+
+ tok_n++;
+ tok = response_get_token(&dev->parsed, tok_n);
+ if (IS_ERR(tok))
+ return PTR_ERR(tok);
+ }
+ } else {
+ /* Only OPAL_LOCKING_TABLE UID is an alternative to OPAL_STARTLIST here. */
+ lr_uid_len = response_get_string(&dev->parsed, tok_n, &lr_uid);
+ if (lr_uid_len != OPAL_UID_LENGTH) {
+ pr_debug("Unexpected response token type %d.\n", tok_n);
+ return OPAL_INVAL_PARAM;
+ }
+
+ if (memcmp(lr_uid, opaluid[OPAL_LOCKING_TABLE], OPAL_UID_LENGTH)) {
+ pr_debug("Unexpected response UID.\n");
+ return OPAL_INVAL_PARAM;
+ }
+
+ /* sed-opal kernel API already provides following limit in Activate command */
+ sranges->num_lrs = OPAL_MAX_LRS;
+ memcpy(sranges->lr, lr_all, OPAL_MAX_LRS);
+ }
+ tok_n++;
+
+ tok = response_get_token(&dev->parsed, tok_n);
+ if (IS_ERR(tok))
+ return PTR_ERR(tok);
+
+ if (!response_token_matches(tok, OPAL_ENDNAME)) {
+ pr_debug("Unexpected response token type %d.\n", tok_n);
+ return OPAL_INVAL_PARAM;
+ }
+ tok_n++;
+
+ err = response_get_column(&dev->parsed, &tok_n, OPAL_SUM_RANGE_POLICY, &val);
+ if (err)
+ return err;
+
+ sranges->range_policy = val ? 1 : 0;
+
+ return 0;
+}
+
+static int opal_get_sum_ranges(struct opal_dev *dev, struct opal_sum_ranges *opal_sum_rngs,
+ void __user *data)
+{
+ const struct opal_step admin_steps[] = {
+ { start_admin1LSP_opal_session, &opal_sum_rngs->key },
+ { get_sum_ranges, opal_sum_rngs },
+ { end_opal_session, }
+ }, anybody_steps[] = {
+ { start_anybodyLSP_opal_session, NULL },
+ { get_sum_ranges, opal_sum_rngs },
+ { end_opal_session, }
+ };
+ int ret;
+
+ mutex_lock(&dev->dev_lock);
+ setup_opal_dev(dev);
+ if (opal_sum_rngs->key.key_len)
+ /* Use Admin1 session (authenticated by PIN) to retrieve LockingInfo columns */
+ ret = execute_steps(dev, admin_steps, ARRAY_SIZE(admin_steps));
+ else
+ /* Use Anybody session (no key) to retrieve LockingInfo columns */
+ ret = execute_steps(dev, anybody_steps, ARRAY_SIZE(anybody_steps));
+ mutex_unlock(&dev->dev_lock);
+
+ /* skip session info when copying back to uspace */
+ if (!ret && copy_to_user(data + offsetof(struct opal_sum_ranges, num_lrs),
+ (void *)opal_sum_rngs + offsetof(struct opal_sum_ranges, num_lrs),
+ sizeof(*opal_sum_rngs) - offsetof(struct opal_sum_ranges, num_lrs))) {
+ pr_debug("Error copying SUM ranges info to userspace\n");
+ return -EFAULT;
+ }
+
+ return ret;
+}
+
int sed_ioctl(struct opal_dev *dev, unsigned int cmd, void __user *arg)
{
void *p;
@@ -3483,6 +3639,9 @@ int sed_ioctl(struct opal_dev *dev, unsigned int cmd, void __user *arg)
case IOC_OPAL_ENABLE_DISABLE_LR:
ret = opal_enable_disable_range(dev, p);
break;
+ case IOC_OPAL_GET_SUM_STATUS:
+ ret = opal_get_sum_ranges(dev, p, arg);
+ break;
default:
break;
diff --git a/include/linux/sed-opal.h b/include/linux/sed-opal.h
index 1d63479838cf..aa006edb612b 100644
--- a/include/linux/sed-opal.h
+++ b/include/linux/sed-opal.h
@@ -56,6 +56,7 @@ static inline bool is_sed_ioctl(unsigned int cmd)
case IOC_OPAL_REACTIVATE_LSP:
case IOC_OPAL_LR_SET_START_LEN:
case IOC_OPAL_ENABLE_DISABLE_LR:
+ case IOC_OPAL_GET_SUM_STATUS:
return true;
}
return false;
diff --git a/include/uapi/linux/sed-opal.h b/include/uapi/linux/sed-opal.h
index bde023ae2295..9830298ec51c 100644
--- a/include/uapi/linux/sed-opal.h
+++ b/include/uapi/linux/sed-opal.h
@@ -111,6 +111,18 @@ struct opal_lr_status {
__u8 align[4];
};
+struct opal_sum_ranges {
+ /*
+ * Initiate Admin1 session if key_len > 0,
+ * use Anybody session otherwise.
+ */
+ struct opal_key key;
+ __u8 num_lrs;
+ __u8 lr[OPAL_MAX_LRS];
+ __u8 range_policy;
+ __u8 align[5]; /* Align to 8 byte boundary */
+};
+
struct opal_lock_unlock {
struct opal_session_info session;
__u32 l_state;
@@ -232,5 +244,6 @@ struct opal_revert_lsp {
#define IOC_OPAL_REACTIVATE_LSP _IOW('p', 242, struct opal_lr_react)
#define IOC_OPAL_LR_SET_START_LEN _IOW('p', 243, struct opal_user_lr_setup)
#define IOC_OPAL_ENABLE_DISABLE_LR _IOW('p', 244, struct opal_user_lr_setup)
+#define IOC_OPAL_GET_SUM_STATUS _IOW('p', 245, struct opal_sum_ranges)
#endif /* _UAPI_SED_OPAL_H */