imsm: print disk encryption information

Print SATA/NVMe disk encryption information in --detail-platform.
Encryption Ability and Status will be printed for each disk.

There is one exception, Opal SATA drives encryption is not checked when
ENCRYPTION_NO_VERIFY key with "sata_opal" value is set in conf, for this
reason such drives are treated as without encryption support.

To test this feature, drives SATA/NVMe with Opal support or SATA drives
with encryption support have to be used.

Example outputs of --detail-platform:

Non Opal, encryption enabled, SATA drive:
Port0 : /dev/sdc (CVPR050600G3120LGN)
        Encryption(Ability|Status): Other|Unlocked

NVMe drive without Opal support:
NVMe under VMD : /dev/nvme2n1 (PHLF737302GB1P0GGN)
        Encryption(Ability|Status): None|Unencrypted

Unencrypted SATA drive with OPAL support:

- default allow_tpm, we will get an error from mdadm:
          Port6 : /dev/sdi (CVTS4246015V180IGN)
mdadm: Detected SATA drive /dev/sdi with Trusted Computing support.
mdadm: Cannot verify encryption state. Requires libata.tpm_enabled=1.
mdadm: Failed to get drive encrytpion information.

-  default "allow_tpm" and config entry "ENCRYPTION_NO_VERIFY sata_opal":
Port6 : /dev/sdi (CVTS4246015V180IGN)
        Encryption(Ability|Status): None|Unencrypted

- added "libata.allow_tpm=1" to boot parameters(requires reboot),
the status will be read correctly:
Port6 : /dev/sdi (CVTS4246015V180IGN)
        Encryption(Ability|Status): SED|Unencrypted

Signed-off-by: Blazej Kucman <[email protected]>
Signed-off-by: Mariusz Tkaczyk <[email protected]>

drive_encryption.c

@@ -141,6 +141,42 @@ typedef struct ata_trusted_computing {
 	__u16 var2 : 1;
 } __attribute__((__packed__)) ata_trusted_computing_t;
 
+mapping_t encryption_ability_map[] = {
+	{ "None", ENC_ABILITY_NONE },
+	{ "Other", ENC_ABILITY_OTHER },
+	{ "SED", ENC_ABILITY_SED },
+	{ NULL, UnSet }
+};
+
+mapping_t encryption_status_map[] = {
+	{ "Unencrypted", ENC_STATUS_UNENCRYPTED },
+	{ "Locked", ENC_STATUS_LOCKED },
+	{ "Unlocked", ENC_STATUS_UNLOCKED },
+	{ NULL, UnSet }
+};
+
+/**
+ * get_encryption_ability_string() - get encryption ability name string.
+ * @ability: encryption ability enum.
+ *
+ * Return: encryption ability string.
+ */
+const char *get_encryption_ability_string(enum encryption_ability ability)
+{
+	return map_num_s(encryption_ability_map, ability);
+}
+
+/**
+ * get_encryption_status_string() - get encryption status name string.
+ * @ability: encryption status enum.
+ *
+ * Return: encryption status string.
+ */
+const char *get_encryption_status_string(enum encryption_status status)
+{
+	return map_num_s(encryption_status_map, status);
+}
+
 /**
  * get_opal_locking_feature_description() - get opal locking feature description.
  * @response: response from Opal Discovery Level 0.

drive_encryption.h

@@ -33,3 +33,5 @@ get_nvme_opal_encryption_information(int disk_fd, struct encryption_information
 mdadm_status_t
 get_ata_encryption_information(int disk_fd, struct encryption_information *information,
 			       const int verbose);
+const char *get_encryption_ability_string(enum encryption_ability ability);
+const char *get_encryption_status_string(enum encryption_status status);

mdadm.conf.5.in

@@ -643,6 +643,9 @@ The
 disables encryption verification for devices with particular encryption support detected.
 Currently, only verification of SATA OPAL encryption can be disabled.
 It does not disable ATA security encryption verification.
+Currently effective only for
+.I IMSM
+metadata.
 Available parameter
 .I "sata_opal".
 

super-intel.c

@@ -27,6 +27,7 @@
 #include <scsi/sg.h>
 #include <ctype.h>
 #include <dirent.h>
+#include "drive_encryption.h"
 
 /* MPB == Metadata Parameter Block */
 #define MPB_SIGNATURE "Intel Raid ISM Cfg Sig. "
@@ -2349,12 +2350,41 @@ static int imsm_read_serial(int fd, char *devname, __u8 *serial,
 			    size_t serial_buf_len);
 static void fd2devname(int fd, char *name);
 
-static int ahci_enumerate_ports(const char *hba_path, int port_count, int host_base, int verbose)
+void print_encryption_information(int disk_fd, enum sys_dev_type hba_type)
+{
+	struct encryption_information information = {0};
+	mdadm_status_t status = MDADM_STATUS_SUCCESS;
+	const char *indent = "                  ";
+
+	switch (hba_type) {
+	case SYS_DEV_VMD:
+	case SYS_DEV_NVME:
+		status = get_nvme_opal_encryption_information(disk_fd, &information, 1);
+		break;
+	case SYS_DEV_SATA:
+	case SYS_DEV_SATA_VMD:
+		status = get_ata_encryption_information(disk_fd, &information, 1);
+		break;
+	default:
+		return;
+	}
+
+	if (status) {
+		pr_err("Failed to get drive encryption information.\n");
+		return;
+	}
+
+	printf("%sEncryption(Ability|Status): %s|%s\n", indent,
+	       get_encryption_ability_string(information.ability),
+	       get_encryption_status_string(information.status));
+}
+
+static int ahci_enumerate_ports(struct sys_dev *hba, int port_count, int host_base, int verbose)
 {
 	/* dump an unsorted list of devices attached to AHCI Intel storage
 	 * controller, as well as non-connected ports
 	 */
-	int hba_len = strlen(hba_path) + 1;
+	int hba_len = strlen(hba->path) + 1;
 	struct dirent *ent;
 	DIR *dir;
 	char *path = NULL;
@@ -2390,7 +2420,7 @@ static int ahci_enumerate_ports(const char *hba_path, int port_count, int host_b
 		path = devt_to_devpath(makedev(major, minor), 1, NULL);
 		if (!path)
 			continue;
-		if (!path_attached_to_hba(path, hba_path)) {
+		if (!path_attached_to_hba(path, hba->path)) {
 			free(path);
 			path = NULL;
 			continue;
@@ -2493,6 +2523,8 @@ static int ahci_enumerate_ports(const char *hba_path, int port_count, int host_b
 				printf(" (%s)\n", buf);
 			else
 				printf(" ()\n");
+
+			print_encryption_information(fd, hba->type);
 			close(fd);
 		}
 		free(path);
@@ -2557,6 +2589,8 @@ static int print_nvme_info(struct sys_dev *hba)
 		else
 			printf("()\n");
 
+		print_encryption_information(fd, hba->type);
+
 skip:
 		close_fd(&fd);
 	}
@@ -2812,7 +2846,7 @@ static int detail_platform_imsm(int verbose, int enumerate_only, char *controlle
 				hba->path, get_sys_dev_type(hba->type));
 			if (hba->type == SYS_DEV_SATA || hba->type == SYS_DEV_SATA_VMD) {
 				host_base = ahci_get_port_count(hba->path, &port_count);
-				if (ahci_enumerate_ports(hba->path, port_count, host_base, verbose)) {
+				if (ahci_enumerate_ports(hba, port_count, host_base, verbose)) {
 					if (verbose > 0)
 						pr_err("failed to enumerate ports on %s controller at %s.\n",
 							get_sys_dev_type(hba->type), hba->pci_id);