Evolution-X-Devices/kernel_samsung_sdm670
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ANDROID: dm table: propagate inline encryption flag to dm devices

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If all targets in a device-mapper table support inline encryption, mark
the mapped device as supporting inline encryption.  This will allow
filesystems such as ext4 to tell whether the hardware supports inline
encryption even in the case where there is an intervening dm device.

Change-Id: I596829f6c5a39fb0d5bedfac9f18828ae27444cb
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Shivaprasad Hongal <shongal@codeaurora.org>
Signed-off-by: Neeraj Soni <neersoni@codeaurora.org>
This commit is contained in:
Eric Biggers
2017-04-12 11:09:24 -07:00
committed by Neeraj Soni
parent 57d8e33f08
commit 0c00b77593
1 changed files with 15 additions and 0 deletions
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15
drivers/md/dm-table.c
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@@ -1495,6 +1495,16 @@ static int queue_supports_sg_merge(struct dm_target *ti, struct dm_dev *dev,
return q && !test_bit(QUEUE_FLAG_NO_SG_MERGE, &q->queue_flags);
}
static int queue_supports_inline_encryption(struct dm_target *ti,
struct dm_dev *dev,
sector_t start, sector_t len,
void *data)
{
struct request_queue *q = bdev_get_queue(dev->bdev);
return q && blk_queue_inlinecrypt(q);
}
static bool dm_table_all_devices_attribute(struct dm_table *t,
iterate_devices_callout_fn func)
{
@@ -1615,6 +1625,11 @@ void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q,
else
queue_flag_set_unlocked(QUEUE_FLAG_NO_SG_MERGE, q);
if (dm_table_all_devices_attribute(t, queue_supports_inline_encryption))
queue_flag_set_unlocked(QUEUE_FLAG_INLINECRYPT, q);
else
queue_flag_clear_unlocked(QUEUE_FLAG_INLINECRYPT, q);
dm_table_verify_integrity(t);
/*