diff options
| author | Mike Christie <michael.christie@oracle.com> | 2023-04-07 23:05:39 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2023-04-12 04:55:35 +0300 |
| commit | 8a8da082e9e46fb8c246822145a2e4920a8d03d5 (patch) | |
| tree | e656d5b8db5b12547d88f14640b5a044a4203849 /drivers/md/dm.c | |
| parent | 0af7b5e2362d3b67334f20e49138d89141dc24d3 (diff) | |
| download | linux-8a8da082e9e46fb8c246822145a2e4920a8d03d5.tar.xz | |
dm: Add support for block PR read keys/reservation
This adds support in dm for the block PR read keys and read reservation
callouts.
Signed-off-by: Mike Christie <michael.christie@oracle.com>
Link: https://lore.kernel.org/r/20230407200551.12660-7-michael.christie@oracle.com
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/md/dm.c')
| -rw-r--r-- | drivers/md/dm.c | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/drivers/md/dm.c b/drivers/md/dm.c index eace45a18d45..360439fc2a36 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -3114,6 +3114,8 @@ struct dm_pr { bool fail_early; int ret; enum pr_type type; + struct pr_keys *read_keys; + struct pr_held_reservation *rsv; }; static int dm_call_pr(struct block_device *bdev, iterate_devices_callout_fn fn, @@ -3346,12 +3348,79 @@ out: return r; } +static int __dm_pr_read_keys(struct dm_target *ti, struct dm_dev *dev, + sector_t start, sector_t len, void *data) +{ + struct dm_pr *pr = data; + const struct pr_ops *ops = dev->bdev->bd_disk->fops->pr_ops; + + if (!ops || !ops->pr_read_keys) { + pr->ret = -EOPNOTSUPP; + return -1; + } + + pr->ret = ops->pr_read_keys(dev->bdev, pr->read_keys); + if (!pr->ret) + return -1; + + return 0; +} + +static int dm_pr_read_keys(struct block_device *bdev, struct pr_keys *keys) +{ + struct dm_pr pr = { + .read_keys = keys, + }; + int ret; + + ret = dm_call_pr(bdev, __dm_pr_read_keys, &pr); + if (ret) + return ret; + + return pr.ret; +} + +static int __dm_pr_read_reservation(struct dm_target *ti, struct dm_dev *dev, + sector_t start, sector_t len, void *data) +{ + struct dm_pr *pr = data; + const struct pr_ops *ops = dev->bdev->bd_disk->fops->pr_ops; + + if (!ops || !ops->pr_read_reservation) { + pr->ret = -EOPNOTSUPP; + return -1; + } + + pr->ret = ops->pr_read_reservation(dev->bdev, pr->rsv); + if (!pr->ret) + return -1; + + return 0; +} + +static int dm_pr_read_reservation(struct block_device *bdev, + struct pr_held_reservation *rsv) +{ + struct dm_pr pr = { + .rsv = rsv, + }; + int ret; + + ret = dm_call_pr(bdev, __dm_pr_read_reservation, &pr); + if (ret) + return ret; + + return pr.ret; +} + static const struct pr_ops dm_pr_ops = { .pr_register = dm_pr_register, .pr_reserve = dm_pr_reserve, .pr_release = dm_pr_release, .pr_preempt = dm_pr_preempt, .pr_clear = dm_pr_clear, + .pr_read_keys = dm_pr_read_keys, + .pr_read_reservation = dm_pr_read_reservation, }; static const struct block_device_operations dm_blk_dops = { |