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| author | Denis Semakin <d.semakin@omprussia.ru> | 2018-03-13 12:23:45 +0300 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2018-04-03 22:04:21 +0300 |
| commit | 00716545c894fc464e00612809d9cb836b180c99 (patch) | |
| tree | 7492fc26be641c58a49b4c81ab707f60a597f629 /drivers/md/dm-table.c | |
| parent | 0519c71e8d461ac3ef9a555bb7339243c9128d37 (diff) | |
| download | linux-00716545c894fc464e00612809d9cb836b180c99.tar.xz | |
dm: add support for secure erase forwarding
Set QUEUE_FLAG_SECERASE in DM device's queue_flags if a DM table's
data devices support secure erase.
Also, add support for secure erase to both the linear and striped
targets.
Signed-off-by: Denis Semakin <d.semakin@omprussia.ru>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md/dm-table.c')
| -rw-r--r-- | drivers/md/dm-table.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c index 7eb3e2a3c07d..f20fbc96a805 100644 --- a/drivers/md/dm-table.c +++ b/drivers/md/dm-table.c @@ -1846,6 +1846,34 @@ static bool dm_table_supports_discards(struct dm_table *t) return true; } +static int device_not_secure_erase_capable(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_secure_erase(q); +} + +static bool dm_table_supports_secure_erase(struct dm_table *t) +{ + struct dm_target *ti; + unsigned int i; + + for (i = 0; i < dm_table_get_num_targets(t); i++) { + ti = dm_table_get_target(t, i); + + if (!ti->num_secure_erase_bios) + return false; + + if (!ti->type->iterate_devices || + ti->type->iterate_devices(ti, device_not_secure_erase_capable, NULL)) + return false; + } + + return true; +} + void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q, struct queue_limits *limits) { @@ -1867,6 +1895,9 @@ void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q, } else queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, q); + if (dm_table_supports_secure_erase(t)) + queue_flag_set_unlocked(QUEUE_FLAG_SECERASE, q); + if (dm_table_supports_flush(t, (1UL << QUEUE_FLAG_WC))) { wc = true; if (dm_table_supports_flush(t, (1UL << QUEUE_FLAG_FUA))) |