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-rw-r--r--block/sed-opal.c252
1 files changed, 247 insertions, 5 deletions
diff --git a/block/sed-opal.c b/block/sed-opal.c
index c18339446ef37..6d7f25d1711ba 100644
--- a/block/sed-opal.c
+++ b/block/sed-opal.c
@@ -20,6 +20,9 @@
#include <linux/sed-opal.h>
#include <linux/string.h>
#include <linux/kdev_t.h>
+#include <linux/key.h>
+#include <linux/key-type.h>
+#include <keys/user-type.h>
#include "opal_proto.h"
@@ -29,6 +32,8 @@
/* Number of bytes needed by cmd_finalize. */
#define CMD_FINALIZE_BYTES_NEEDED 7
+static struct key *sed_opal_keyring;
+
struct opal_step {
int (*fn)(struct opal_dev *dev, void *data);
void *data;
@@ -269,6 +274,101 @@ static void print_buffer(const u8 *ptr, u32 length)
#endif
}
+/*
+ * Allocate/update a SED Opal key and add it to the SED Opal keyring.
+ */
+static int update_sed_opal_key(const char *desc, u_char *key_data, int keylen)
+{
+ key_ref_t kr;
+
+ if (!sed_opal_keyring)
+ return -ENOKEY;
+
+ kr = key_create_or_update(make_key_ref(sed_opal_keyring, true), "user",
+ desc, (const void *)key_data, keylen,
+ KEY_USR_VIEW | KEY_USR_SEARCH | KEY_USR_WRITE,
+ KEY_ALLOC_NOT_IN_QUOTA | KEY_ALLOC_BUILT_IN |
+ KEY_ALLOC_BYPASS_RESTRICTION);
+ if (IS_ERR(kr)) {
+ pr_err("Error adding SED key (%ld)\n", PTR_ERR(kr));
+ return PTR_ERR(kr);
+ }
+
+ return 0;
+}
+
+/*
+ * Read a SED Opal key from the SED Opal keyring.
+ */
+static int read_sed_opal_key(const char *key_name, u_char *buffer, int buflen)
+{
+ int ret;
+ key_ref_t kref;
+ struct key *key;
+
+ if (!sed_opal_keyring)
+ return -ENOKEY;
+
+ kref = keyring_search(make_key_ref(sed_opal_keyring, true),
+ &key_type_user, key_name, true);
+
+ if (IS_ERR(kref))
+ ret = PTR_ERR(kref);
+
+ key = key_ref_to_ptr(kref);
+ down_read(&key->sem);
+ ret = key_validate(key);
+ if (ret == 0) {
+ if (buflen > key->datalen)
+ buflen = key->datalen;
+
+ ret = key->type->read(key, (char *)buffer, buflen);
+ }
+ up_read(&key->sem);
+
+ key_ref_put(kref);
+
+ return ret;
+}
+
+static int opal_get_key(struct opal_dev *dev, struct opal_key *key)
+{
+ int ret = 0;
+
+ switch (key->key_type) {
+ case OPAL_INCLUDED:
+ /* the key is ready to use */
+ break;
+ case OPAL_KEYRING:
+ /* the key is in the keyring */
+ ret = read_sed_opal_key(OPAL_AUTH_KEY, key->key, OPAL_KEY_MAX);
+ if (ret > 0) {
+ if (ret > U8_MAX) {
+ ret = -ENOSPC;
+ goto error;
+ }
+ key->key_len = ret;
+ key->key_type = OPAL_INCLUDED;
+ }
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+ if (ret < 0)
+ goto error;
+
+ /* must have a PEK by now or it's an error */
+ if (key->key_type != OPAL_INCLUDED || key->key_len == 0) {
+ ret = -EINVAL;
+ goto error;
+ }
+ return 0;
+error:
+ pr_debug("Error getting password: %d\n", ret);
+ return ret;
+}
+
static bool check_tper(const void *data)
{
const struct d0_tper_features *tper = data;
@@ -463,8 +563,11 @@ out_error:
return error;
}
-static int opal_discovery0_end(struct opal_dev *dev)
+static int opal_discovery0_end(struct opal_dev *dev, void *data)
{
+ struct opal_discovery *discv_out = data; /* may be NULL */
+ u8 __user *buf_out;
+ u64 len_out;
bool found_com_id = false, supported = true, single_user = false;
const struct d0_header *hdr = (struct d0_header *)dev->resp;
const u8 *epos = dev->resp, *cpos = dev->resp;
@@ -480,6 +583,15 @@ static int opal_discovery0_end(struct opal_dev *dev)
return -EFAULT;
}
+ if (discv_out) {
+ buf_out = (u8 __user *)(uintptr_t)discv_out->data;
+ len_out = min_t(u64, discv_out->size, hlen);
+ if (buf_out && copy_to_user(buf_out, dev->resp, len_out))
+ return -EFAULT;
+
+ discv_out->size = hlen; /* actual size of data */
+ }
+
epos += hlen; /* end of buffer */
cpos += sizeof(*hdr); /* current position on buffer */
@@ -565,13 +677,13 @@ static int opal_discovery0(struct opal_dev *dev, void *data)
if (ret)
return ret;
- return opal_discovery0_end(dev);
+ return opal_discovery0_end(dev, data);
}
static int opal_discovery0_step(struct opal_dev *dev)
{
const struct opal_step discovery0_step = {
- opal_discovery0,
+ opal_discovery0, NULL
};
return execute_step(dev, &discovery0_step, 0);
@@ -1757,6 +1869,26 @@ static int internal_activate_user(struct opal_dev *dev, void *data)
return finalize_and_send(dev, parse_and_check_status);
}
+static int revert_lsp(struct opal_dev *dev, void *data)
+{
+ struct opal_revert_lsp *rev = data;
+ int err;
+
+ err = cmd_start(dev, opaluid[OPAL_THISSP_UID],
+ opalmethod[OPAL_REVERTSP]);
+ add_token_u8(&err, dev, OPAL_STARTNAME);
+ add_token_u64(&err, dev, OPAL_KEEP_GLOBAL_RANGE_KEY);
+ add_token_u8(&err, dev, (rev->options & OPAL_PRESERVE) ?
+ OPAL_TRUE : OPAL_FALSE);
+ add_token_u8(&err, dev, OPAL_ENDNAME);
+ if (err) {
+ pr_debug("Error building REVERT SP command.\n");
+ return err;
+ }
+
+ return finalize_and_send(dev, parse_and_check_status);
+}
+
static int erase_locking_range(struct opal_dev *dev, void *data)
{
struct opal_session_info *session = data;
@@ -2427,6 +2559,9 @@ static int opal_secure_erase_locking_range(struct opal_dev *dev,
};
int ret;
+ ret = opal_get_key(dev, &opal_session->opal_key);
+ if (ret)
+ return ret;
mutex_lock(&dev->dev_lock);
setup_opal_dev(dev);
ret = execute_steps(dev, erase_steps, ARRAY_SIZE(erase_steps));
@@ -2435,6 +2570,42 @@ static int opal_secure_erase_locking_range(struct opal_dev *dev,
return ret;
}
+static int opal_get_discv(struct opal_dev *dev, struct opal_discovery *discv)
+{
+ const struct opal_step discovery0_step = {
+ opal_discovery0, discv
+ };
+ int ret = 0;
+
+ mutex_lock(&dev->dev_lock);
+ setup_opal_dev(dev);
+ ret = execute_step(dev, &discovery0_step, 0);
+ mutex_unlock(&dev->dev_lock);
+ if (ret)
+ return ret;
+ return discv->size; /* modified to actual length of data */
+}
+
+static int opal_revertlsp(struct opal_dev *dev, struct opal_revert_lsp *rev)
+{
+ /* controller will terminate session */
+ const struct opal_step steps[] = {
+ { start_admin1LSP_opal_session, &rev->key },
+ { revert_lsp, rev }
+ };
+ int ret;
+
+ ret = opal_get_key(dev, &rev->key);
+ if (ret)
+ return ret;
+ mutex_lock(&dev->dev_lock);
+ setup_opal_dev(dev);
+ ret = execute_steps(dev, steps, ARRAY_SIZE(steps));
+ mutex_unlock(&dev->dev_lock);
+
+ return ret;
+}
+
static int opal_erase_locking_range(struct opal_dev *dev,
struct opal_session_info *opal_session)
{
@@ -2445,6 +2616,9 @@ static int opal_erase_locking_range(struct opal_dev *dev,
};
int ret;
+ ret = opal_get_key(dev, &opal_session->opal_key);
+ if (ret)
+ return ret;
mutex_lock(&dev->dev_lock);
setup_opal_dev(dev);
ret = execute_steps(dev, erase_steps, ARRAY_SIZE(erase_steps));
@@ -2473,6 +2647,9 @@ static int opal_enable_disable_shadow_mbr(struct opal_dev *dev,
opal_mbr->enable_disable != OPAL_MBR_DISABLE)
return -EINVAL;
+ ret = opal_get_key(dev, &opal_mbr->key);
+ if (ret)
+ return ret;
mutex_lock(&dev->dev_lock);
setup_opal_dev(dev);
ret = execute_steps(dev, mbr_steps, ARRAY_SIZE(mbr_steps));
@@ -2498,6 +2675,9 @@ static int opal_set_mbr_done(struct opal_dev *dev,
mbr_done->done_flag != OPAL_MBR_NOT_DONE)
return -EINVAL;
+ ret = opal_get_key(dev, &mbr_done->key);
+ if (ret)
+ return ret;
mutex_lock(&dev->dev_lock);
setup_opal_dev(dev);
ret = execute_steps(dev, mbr_steps, ARRAY_SIZE(mbr_steps));
@@ -2519,6 +2699,9 @@ static int opal_write_shadow_mbr(struct opal_dev *dev,
if (info->size == 0)
return 0;
+ ret = opal_get_key(dev, &info->key);
+ if (ret)
+ return ret;
mutex_lock(&dev->dev_lock);
setup_opal_dev(dev);
ret = execute_steps(dev, mbr_steps, ARRAY_SIZE(mbr_steps));
@@ -2576,6 +2759,9 @@ static int opal_add_user_to_lr(struct opal_dev *dev,
return -EINVAL;
}
+ ret = opal_get_key(dev, &lk_unlk->session.opal_key);
+ if (ret)
+ return ret;
mutex_lock(&dev->dev_lock);
setup_opal_dev(dev);
ret = execute_steps(dev, steps, ARRAY_SIZE(steps));
@@ -2598,6 +2784,10 @@ static int opal_reverttper(struct opal_dev *dev, struct opal_key *opal, bool psi
int ret;
+ ret = opal_get_key(dev, opal);
+
+ if (ret)
+ return ret;
mutex_lock(&dev->dev_lock);
setup_opal_dev(dev);
if (psid)
@@ -2698,6 +2888,9 @@ static int opal_lock_unlock(struct opal_dev *dev,
if (lk_unlk->session.who > OPAL_USER9)
return -EINVAL;
+ ret = opal_get_key(dev, &lk_unlk->session.opal_key);
+ if (ret)
+ return ret;
mutex_lock(&dev->dev_lock);
opal_lock_check_for_saved_key(dev, lk_unlk);
ret = __opal_lock_unlock(dev, lk_unlk);
@@ -2721,6 +2914,9 @@ static int opal_take_ownership(struct opal_dev *dev, struct opal_key *opal)
if (!dev)
return -ENODEV;
+ ret = opal_get_key(dev, opal);
+ if (ret)
+ return ret;
mutex_lock(&dev->dev_lock);
setup_opal_dev(dev);
ret = execute_steps(dev, owner_steps, ARRAY_SIZE(owner_steps));
@@ -2743,6 +2939,9 @@ static int opal_activate_lsp(struct opal_dev *dev,
if (!opal_lr_act->num_lrs || opal_lr_act->num_lrs > OPAL_MAX_LRS)
return -EINVAL;
+ ret = opal_get_key(dev, &opal_lr_act->key);
+ if (ret)
+ return ret;
mutex_lock(&dev->dev_lock);
setup_opal_dev(dev);
ret = execute_steps(dev, active_steps, ARRAY_SIZE(active_steps));
@@ -2761,6 +2960,9 @@ static int opal_setup_locking_range(struct opal_dev *dev,
};
int ret;
+ ret = opal_get_key(dev, &opal_lrs->session.opal_key);
+ if (ret)
+ return ret;
mutex_lock(&dev->dev_lock);
setup_opal_dev(dev);
ret = execute_steps(dev, lr_steps, ARRAY_SIZE(lr_steps));
@@ -2814,6 +3016,14 @@ static int opal_set_new_pw(struct opal_dev *dev, struct opal_new_pw *opal_pw)
ret = execute_steps(dev, pw_steps, ARRAY_SIZE(pw_steps));
mutex_unlock(&dev->dev_lock);
+ if (ret)
+ return ret;
+
+ /* update keyring with new password */
+ ret = update_sed_opal_key(OPAL_AUTH_KEY,
+ opal_pw->new_user_pw.opal_key.key,
+ opal_pw->new_user_pw.opal_key.key_len);
+
return ret;
}
@@ -2834,6 +3044,9 @@ static int opal_activate_user(struct opal_dev *dev,
return -EINVAL;
}
+ ret = opal_get_key(dev, &opal_session->opal_key);
+ if (ret)
+ return ret;
mutex_lock(&dev->dev_lock);
setup_opal_dev(dev);
ret = execute_steps(dev, act_steps, ARRAY_SIZE(act_steps));
@@ -2920,6 +3133,9 @@ static int opal_generic_read_write_table(struct opal_dev *dev,
{
int ret, bit_set;
+ ret = opal_get_key(dev, &rw_tbl->key);
+ if (ret)
+ return ret;
mutex_lock(&dev->dev_lock);
setup_opal_dev(dev);
@@ -2988,9 +3204,9 @@ int sed_ioctl(struct opal_dev *dev, unsigned int cmd, void __user *arg)
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
if (!dev)
- return -ENOTSUPP;
+ return -EOPNOTSUPP;
if (!(dev->flags & OPAL_FL_SUPPORTED))
- return -ENOTSUPP;
+ return -EOPNOTSUPP;
if (cmd & IOC_IN) {
p = memdup_user(arg, _IOC_SIZE(cmd));
@@ -3056,6 +3272,13 @@ int sed_ioctl(struct opal_dev *dev, unsigned int cmd, void __user *arg)
case IOC_OPAL_GET_GEOMETRY:
ret = opal_get_geometry(dev, arg);
break;
+ case IOC_OPAL_REVERT_LSP:
+ ret = opal_revertlsp(dev, p);
+ break;
+ case IOC_OPAL_DISCOVERY:
+ ret = opal_get_discv(dev, p);
+ break;
+
default:
break;
}
@@ -3065,3 +3288,22 @@ int sed_ioctl(struct opal_dev *dev, unsigned int cmd, void __user *arg)
return ret;
}
EXPORT_SYMBOL_GPL(sed_ioctl);
+
+static int __init sed_opal_init(void)
+{
+ struct key *kr;
+
+ kr = keyring_alloc(".sed_opal",
+ GLOBAL_ROOT_UID, GLOBAL_ROOT_GID, current_cred(),
+ (KEY_POS_ALL & ~KEY_POS_SETATTR) | KEY_USR_VIEW |
+ KEY_USR_READ | KEY_USR_SEARCH | KEY_USR_WRITE,
+ KEY_ALLOC_NOT_IN_QUOTA,
+ NULL, NULL);
+ if (IS_ERR(kr))
+ return PTR_ERR(kr);
+
+ sed_opal_keyring = kr;
+
+ return 0;
+}
+late_initcall(sed_opal_init);
generated by cgit 1.2.3-korg (git 2.39.0) at 2024-05-19 19:14:23 +0000