diff options
Diffstat (limited to 'block/blk-crypto-sysfs.c')
| -rw-r--r-- | block/blk-crypto-sysfs.c | 48 |
1 files changed, 42 insertions, 6 deletions
diff --git a/block/blk-crypto-sysfs.c b/block/blk-crypto-sysfs.c index fd93bd2f33b7..e832f403f200 100644 --- a/block/blk-crypto-sysfs.c +++ b/block/blk-crypto-sysfs.c @@ -31,6 +31,13 @@ static struct blk_crypto_attr *attr_to_crypto_attr(struct attribute *attr) return container_of(attr, struct blk_crypto_attr, attr); } +static ssize_t hw_wrapped_keys_show(struct blk_crypto_profile *profile, + struct blk_crypto_attr *attr, char *page) +{ + /* Always show supported, since the file doesn't exist otherwise. */ + return sysfs_emit(page, "supported\n"); +} + static ssize_t max_dun_bits_show(struct blk_crypto_profile *profile, struct blk_crypto_attr *attr, char *page) { @@ -43,20 +50,48 @@ static ssize_t num_keyslots_show(struct blk_crypto_profile *profile, return sysfs_emit(page, "%u\n", profile->num_slots); } +static ssize_t raw_keys_show(struct blk_crypto_profile *profile, + struct blk_crypto_attr *attr, char *page) +{ + /* Always show supported, since the file doesn't exist otherwise. */ + return sysfs_emit(page, "supported\n"); +} + #define BLK_CRYPTO_RO_ATTR(_name) \ static struct blk_crypto_attr _name##_attr = __ATTR_RO(_name) +BLK_CRYPTO_RO_ATTR(hw_wrapped_keys); BLK_CRYPTO_RO_ATTR(max_dun_bits); BLK_CRYPTO_RO_ATTR(num_keyslots); +BLK_CRYPTO_RO_ATTR(raw_keys); + +static umode_t blk_crypto_is_visible(struct kobject *kobj, + struct attribute *attr, int n) +{ + struct blk_crypto_profile *profile = kobj_to_crypto_profile(kobj); + struct blk_crypto_attr *a = attr_to_crypto_attr(attr); + + if (a == &hw_wrapped_keys_attr && + !(profile->key_types_supported & BLK_CRYPTO_KEY_TYPE_HW_WRAPPED)) + return 0; + if (a == &raw_keys_attr && + !(profile->key_types_supported & BLK_CRYPTO_KEY_TYPE_RAW)) + return 0; + + return 0444; +} static struct attribute *blk_crypto_attrs[] = { + &hw_wrapped_keys_attr.attr, &max_dun_bits_attr.attr, &num_keyslots_attr.attr, + &raw_keys_attr.attr, NULL, }; static const struct attribute_group blk_crypto_attr_group = { .attrs = blk_crypto_attrs, + .is_visible = blk_crypto_is_visible, }; /* @@ -116,7 +151,7 @@ static void blk_crypto_release(struct kobject *kobj) kfree(container_of(kobj, struct blk_crypto_kobj, kobj)); } -static struct kobj_type blk_crypto_ktype = { +static const struct kobj_type blk_crypto_ktype = { .default_groups = blk_crypto_attr_groups, .sysfs_ops = &blk_crypto_attr_ops, .release = blk_crypto_release, @@ -126,8 +161,9 @@ static struct kobj_type blk_crypto_ktype = { * If the request_queue has a blk_crypto_profile, create the "crypto" * subdirectory in sysfs (/sys/block/$disk/queue/crypto/). */ -int blk_crypto_sysfs_register(struct request_queue *q) +int blk_crypto_sysfs_register(struct gendisk *disk) { + struct request_queue *q = disk->queue; struct blk_crypto_kobj *obj; int err; @@ -139,8 +175,8 @@ int blk_crypto_sysfs_register(struct request_queue *q) return -ENOMEM; obj->profile = q->crypto_profile; - err = kobject_init_and_add(&obj->kobj, &blk_crypto_ktype, &q->kobj, - "crypto"); + err = kobject_init_and_add(&obj->kobj, &blk_crypto_ktype, + &disk->queue_kobj, "crypto"); if (err) { kobject_put(&obj->kobj); return err; @@ -149,9 +185,9 @@ int blk_crypto_sysfs_register(struct request_queue *q) return 0; } -void blk_crypto_sysfs_unregister(struct request_queue *q) +void blk_crypto_sysfs_unregister(struct gendisk *disk) { - kobject_put(q->crypto_kobject); + kobject_put(disk->queue->crypto_kobject); } static int __init blk_crypto_sysfs_init(void) |