Merge tag 'for-6.16/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm

Pull device mapper updates from Mikulas Patocka:

 - better error handling when reloading a table

 - use use generic disable_* functions instead of open coding them

 - lock queue limits when reading them

 - remove unneeded kvfree from alloc_targets

 - fix BLK_FEAT_ATOMIC_WRITES

 - pass through operations on wrapped inline crypto keys

 - dm-verity:
     - use softirq context only when !need_resched()
     - fix a memory leak if some arguments are specified multiple times

 - dm-mpath:
    - interface for explicit probing of active paths
    - replace spin_lock_irqsave with spin_lock_irq

 - dm-delay: don't busy-wait in kthread

 - dm-bufio: remove maximum age based eviction

 - dm-flakey: various fixes

 - vdo indexer: don't read request structure after enqueuing

 - dm-zone: Use bdev_*() helper functions where applicable

 - dm-mirror: fix a tiny race condition

 - dm-stripe: small code cleanup

* tag 'for-6.16/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm: (29 commits)
  dm-stripe: small code cleanup
  dm-verity: fix a memory leak if some arguments are specified multiple times
  dm-mirror: fix a tiny race condition
  dm-table: check BLK_FEAT_ATOMIC_WRITES inside limits_lock
  dm mpath: replace spin_lock_irqsave with spin_lock_irq
  dm-mpath: Don't grab work_mutex while probing paths
  dm-zone: Use bdev_*() helper functions where applicable
  dm vdo indexer: don't read request structure after enqueuing
  dm: pass through operations on wrapped inline crypto keys
  blk-crypto: export wrapped key functions
  dm-table: Set BLK_FEAT_ATOMIC_WRITES for target queue limits
  dm mpath: Interface for explicit probing of active paths
  dm: Allow .prepare_ioctl to handle ioctls directly
  dm-flakey: make corrupting read bios work
  dm-flakey: remove useless ERROR_READS check in flakey_end_io
  dm-flakey: error all IOs when num_features is absent
  dm-flakey: Clean up parsing messages
  dm: remove unneeded kvfree from alloc_targets
  dm-bufio: remove maximum age based eviction
  dm-verity: use softirq context only when !need_resched()
  ...

3 files changed, 22 insertions, 3 deletions

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 332b56f323d9..a59880c809c7 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1456,6 +1456,13 @@ static inline bool bdev_is_zone_start(struct block_device *bdev,
 	return bdev_offset_from_zone_start(bdev, sector) == 0;
 }
 
+/* Check whether @sector is a multiple of the zone size. */
+static inline bool bdev_is_zone_aligned(struct block_device *bdev,
+					sector_t sector)
+{
+	return bdev_is_zone_start(bdev, sector);
+}
+
 /**
  * bdev_zone_is_seq - check if a sector belongs to a sequential write zone
  * @bdev:	block device to check
diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h
index bcc6d7b69470..cb95951547ab 100644
--- a/include/linux/device-mapper.h
+++ b/include/linux/device-mapper.h
@@ -93,7 +93,14 @@ typedef void (*dm_status_fn) (struct dm_target *ti, status_type_t status_type,
 typedef int (*dm_message_fn) (struct dm_target *ti, unsigned int argc, char **argv,
 			      char *result, unsigned int maxlen);
 
-typedef int (*dm_prepare_ioctl_fn) (struct dm_target *ti, struct block_device **bdev);
+/*
+ * Called with *forward == true. If it remains true, the ioctl should be
+ * forwarded to bdev. If it is reset to false, the target already fully handled
+ * the ioctl and the return value is the return value for the whole ioctl.
+ */
+typedef int (*dm_prepare_ioctl_fn) (struct dm_target *ti, struct block_device **bdev,
+				    unsigned int cmd, unsigned long arg,
+				    bool *forward);
 
 #ifdef CONFIG_BLK_DEV_ZONED
 typedef int (*dm_report_zones_fn) (struct dm_target *ti,
diff --git a/include/uapi/linux/dm-ioctl.h b/include/uapi/linux/dm-ioctl.h
index b08c7378164d..3225e025e30e 100644
--- a/include/uapi/linux/dm-ioctl.h
+++ b/include/uapi/linux/dm-ioctl.h
@@ -258,10 +258,12 @@ enum {
 	DM_DEV_SET_GEOMETRY_CMD,
 	DM_DEV_ARM_POLL_CMD,
 	DM_GET_TARGET_VERSION_CMD,
+	DM_MPATH_PROBE_PATHS_CMD,
 };
 
 #define DM_IOCTL 0xfd
 
+/* Control device ioctls */
 #define DM_VERSION       _IOWR(DM_IOCTL, DM_VERSION_CMD, struct dm_ioctl)
 #define DM_REMOVE_ALL    _IOWR(DM_IOCTL, DM_REMOVE_ALL_CMD, struct dm_ioctl)
 #define DM_LIST_DEVICES  _IOWR(DM_IOCTL, DM_LIST_DEVICES_CMD, struct dm_ioctl)
@@ -285,10 +287,13 @@ enum {
 #define DM_TARGET_MSG	 _IOWR(DM_IOCTL, DM_TARGET_MSG_CMD, struct dm_ioctl)
 #define DM_DEV_SET_GEOMETRY	_IOWR(DM_IOCTL, DM_DEV_SET_GEOMETRY_CMD, struct dm_ioctl)
 
+/* Block device ioctls */
+#define DM_MPATH_PROBE_PATHS _IO(DM_IOCTL, DM_MPATH_PROBE_PATHS_CMD)
+
 #define DM_VERSION_MAJOR	4
-#define DM_VERSION_MINOR	49
+#define DM_VERSION_MINOR	50
 #define DM_VERSION_PATCHLEVEL	0
-#define DM_VERSION_EXTRA	"-ioctl (2025-01-17)"
+#define DM_VERSION_EXTRA	"-ioctl (2025-04-28)"
 
 /* Status bits */
 #define DM_READONLY_FLAG	(1 << 0) /* In/Out */