Merge tag 'for-6.18/block-20250929' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux

Pull block updates from Jens Axboe:

 - NVMe pull request via Keith:
     - FC target fixes (Daniel)
     - Authentication fixes and updates (Martin, Chris)
     - Admin controller handling (Kamaljit)
     - Target lockdep assertions (Max)
     - Keep-alive updates for discovery (Alastair)
     - Suspend quirk (Georg)

 - MD pull request via Yu:
     - Add support for a lockless bitmap.

       A key feature for the new bitmap are that the IO fastpath is
       lockless. If a user issues lots of write IO to the same bitmap
       bit in a short time, only the first write has additional overhead
       to update bitmap bit, no additional overhead for the following
       writes.

       By supporting only resync or recover written data, means in the
       case creating new array or replacing with a new disk, there is no
       need to do a full disk resync/recovery.

 - Switch ->getgeo() and ->bios_param() to using struct gendisk rather
   than struct block_device.

 - Rust block changes via Andreas. This series adds configuration via
   configfs and remote completion to the rnull driver. The series also
   includes a set of changes to the rust block device driver API: a few
   cleanup patches, and a few features supporting the rnull changes.

   The series removes the raw buffer formatting logic from
   `kernel::block` and improves the logic available in `kernel::string`
   to support the same use as the removed logic.

 - floppy arch cleanups

 - Reduce the number of dereferencing needed for ublk commands

 - Restrict supported sockets for nbd. Mostly done to eliminate a class
   of issues perpetually reported by syzbot, by using nonsensical socket
   setups.

 - A few s390 dasd block fixes

 - Fix a few issues around atomic writes

 - Improve DMA interation for integrity requests

 - Improve how iovecs are treated with regards to O_DIRECT aligment
   constraints.

   We used to require each segment to adhere to the constraints, now
   only the request as a whole needs to.

 - Clean up and improve p2p support, enabling use of p2p for metadata
   payloads

 - Improve locking of request lookup, using SRCU where appropriate

 - Use page references properly for brd, avoiding very long RCU sections

 - Fix ordering of recursively submitted IOs

 - Clean up and improve updating nr_requests for a live device

 - Various fixes and cleanups

* tag 'for-6.18/block-20250929' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux: (164 commits)
  s390/dasd: enforce dma_alignment to ensure proper buffer validation
  s390/dasd: Return BLK_STS_INVAL for EINVAL from do_dasd_request
  ublk: remove redundant zone op check in ublk_setup_iod()
  nvme: Use non zero KATO for persistent discovery connections
  nvmet: add safety check for subsys lock
  nvme-core: use nvme_is_io_ctrl() for I/O controller check
  nvme-core: do ioccsz/iorcsz validation only for I/O controllers
  nvme-core: add method to check for an I/O controller
  blk-cgroup: fix possible deadlock while configuring policy
  blk-mq: fix null-ptr-deref in blk_mq_free_tags() from error path
  blk-mq: Fix more tag iteration function documentation
  selftests: ublk: fix behavior when fio is not installed
  ublk: don't access ublk_queue in ublk_unmap_io()
  ublk: pass ublk_io to __ublk_complete_rq()
  ublk: don't access ublk_queue in ublk_need_complete_req()
  ublk: don't access ublk_queue in ublk_check_commit_and_fetch()
  ublk: don't pass ublk_queue to ublk_fetch()
  ublk: don't access ublk_queue in ublk_config_io_buf()
  ublk: don't access ublk_queue in ublk_check_fetch_buf()
  ublk: pass q_id and tag to __ublk_check_and_get_req()
  ...

9 files changed, 62 insertions, 15 deletions

diff --git a/tools/testing/selftests/ublk/Makefile b/tools/testing/selftests/ublk/Makefile
index 5d7f4ecfb816..770269efe42a 100644
--- a/tools/testing/selftests/ublk/Makefile
+++ b/tools/testing/selftests/ublk/Makefile
@@ -20,6 +20,7 @@ TEST_PROGS += test_generic_09.sh
 TEST_PROGS += test_generic_10.sh
 TEST_PROGS += test_generic_11.sh
 TEST_PROGS += test_generic_12.sh
+TEST_PROGS += test_generic_13.sh
 
 TEST_PROGS += test_null_01.sh
 TEST_PROGS += test_null_02.sh
diff --git a/tools/testing/selftests/ublk/kublk.c b/tools/testing/selftests/ublk/kublk.c
index b71faba86c3b..6b8123c12a7a 100644
--- a/tools/testing/selftests/ublk/kublk.c
+++ b/tools/testing/selftests/ublk/kublk.c
@@ -1384,21 +1384,23 @@ static int cmd_dev_list(struct dev_ctx *ctx)
 static int cmd_dev_get_features(void)
 {
 #define const_ilog2(x) (63 - __builtin_clzll(x))
+#define FEAT_NAME(f) [const_ilog2(f)] = #f
 	static const char *feat_map[] = {
-		[const_ilog2(UBLK_F_SUPPORT_ZERO_COPY)] = "ZERO_COPY",
-		[const_ilog2(UBLK_F_URING_CMD_COMP_IN_TASK)] = "COMP_IN_TASK",
-		[const_ilog2(UBLK_F_NEED_GET_DATA)] = "GET_DATA",
-		[const_ilog2(UBLK_F_USER_RECOVERY)] = "USER_RECOVERY",
-		[const_ilog2(UBLK_F_USER_RECOVERY_REISSUE)] = "RECOVERY_REISSUE",
-		[const_ilog2(UBLK_F_UNPRIVILEGED_DEV)] = "UNPRIVILEGED_DEV",
-		[const_ilog2(UBLK_F_CMD_IOCTL_ENCODE)] = "CMD_IOCTL_ENCODE",
-		[const_ilog2(UBLK_F_USER_COPY)] = "USER_COPY",
-		[const_ilog2(UBLK_F_ZONED)] = "ZONED",
-		[const_ilog2(UBLK_F_USER_RECOVERY_FAIL_IO)] = "RECOVERY_FAIL_IO",
-		[const_ilog2(UBLK_F_UPDATE_SIZE)] = "UPDATE_SIZE",
-		[const_ilog2(UBLK_F_AUTO_BUF_REG)] = "AUTO_BUF_REG",
-		[const_ilog2(UBLK_F_QUIESCE)] = "QUIESCE",
-		[const_ilog2(UBLK_F_PER_IO_DAEMON)] = "PER_IO_DAEMON",
+		FEAT_NAME(UBLK_F_SUPPORT_ZERO_COPY),
+		FEAT_NAME(UBLK_F_URING_CMD_COMP_IN_TASK),
+		FEAT_NAME(UBLK_F_NEED_GET_DATA),
+		FEAT_NAME(UBLK_F_USER_RECOVERY),
+		FEAT_NAME(UBLK_F_USER_RECOVERY_REISSUE),
+		FEAT_NAME(UBLK_F_UNPRIVILEGED_DEV),
+		FEAT_NAME(UBLK_F_CMD_IOCTL_ENCODE),
+		FEAT_NAME(UBLK_F_USER_COPY),
+		FEAT_NAME(UBLK_F_ZONED),
+		FEAT_NAME(UBLK_F_USER_RECOVERY_FAIL_IO),
+		FEAT_NAME(UBLK_F_UPDATE_SIZE),
+		FEAT_NAME(UBLK_F_AUTO_BUF_REG),
+		FEAT_NAME(UBLK_F_QUIESCE),
+		FEAT_NAME(UBLK_F_PER_IO_DAEMON),
+		FEAT_NAME(UBLK_F_BUF_REG_OFF_DAEMON),
 	};
 	struct ublk_dev *dev;
 	__u64 features = 0;
@@ -1425,7 +1427,7 @@ static int cmd_dev_get_features(void)
 				feat = feat_map[i];
 			else
 				feat = "unknown";
-			printf("\t%-20s: 0x%llx\n", feat, 1ULL << i);
+			printf("0x%-16llx: %s\n", 1ULL << i, feat);
 		}
 	}
 
diff --git a/tools/testing/selftests/ublk/test_generic_01.sh b/tools/testing/selftests/ublk/test_generic_01.sh
index 9227a208ba53..21a31cd5491a 100755
--- a/tools/testing/selftests/ublk/test_generic_01.sh
+++ b/tools/testing/selftests/ublk/test_generic_01.sh
@@ -10,6 +10,10 @@ if ! _have_program bpftrace; then
 	exit "$UBLK_SKIP_CODE"
 fi
 
+if ! _have_program fio; then
+	exit "$UBLK_SKIP_CODE"
+fi
+
 _prep_test "null" "sequential io order"
 
 dev_id=$(_add_ublk_dev -t null)
diff --git a/tools/testing/selftests/ublk/test_generic_02.sh b/tools/testing/selftests/ublk/test_generic_02.sh
index 3e80121e3bf5..12920768b1a0 100755
--- a/tools/testing/selftests/ublk/test_generic_02.sh
+++ b/tools/testing/selftests/ublk/test_generic_02.sh
@@ -10,6 +10,10 @@ if ! _have_program bpftrace; then
 	exit "$UBLK_SKIP_CODE"
 fi
 
+if ! _have_program fio; then
+	exit "$UBLK_SKIP_CODE"
+fi
+
 _prep_test "null" "sequential io order for MQ"
 
 dev_id=$(_add_ublk_dev -t null -q 2)
diff --git a/tools/testing/selftests/ublk/test_generic_12.sh b/tools/testing/selftests/ublk/test_generic_12.sh
index 7abbb00d251d..b4046201b4d9 100755
--- a/tools/testing/selftests/ublk/test_generic_12.sh
+++ b/tools/testing/selftests/ublk/test_generic_12.sh
@@ -10,6 +10,10 @@ if ! _have_program bpftrace; then
 	exit "$UBLK_SKIP_CODE"
 fi
 
+if ! _have_program fio; then
+	exit "$UBLK_SKIP_CODE"
+fi
+
 _prep_test "null" "do imbalanced load, it should be balanced over I/O threads"
 
 NTHREADS=6
diff --git a/tools/testing/selftests/ublk/test_generic_13.sh b/tools/testing/selftests/ublk/test_generic_13.sh
new file mode 100755
index 000000000000..b7aa90b1cb74
--- /dev/null
+++ b/tools/testing/selftests/ublk/test_generic_13.sh
@@ -0,0 +1,20 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+
+. "$(cd "$(dirname "$0")" && pwd)"/test_common.sh
+
+TID="generic_13"
+ERR_CODE=0
+
+_prep_test "null" "check that feature list is complete"
+
+if ${UBLK_PROG} features | grep -q unknown; then
+        echo "# unknown feature detected!"
+        echo "# did you add a feature and forget to update feat_map in kublk?"
+        echo "# this failure is expected if running an older test suite against"
+        echo "# a newer kernel with new features added"
+        ERR_CODE=255
+fi
+
+_cleanup_test "null"
+_show_result $TID $ERR_CODE
diff --git a/tools/testing/selftests/ublk/test_null_01.sh b/tools/testing/selftests/ublk/test_null_01.sh
index a34203f72668..c2cb8f7a09fe 100755
--- a/tools/testing/selftests/ublk/test_null_01.sh
+++ b/tools/testing/selftests/ublk/test_null_01.sh
@@ -6,6 +6,10 @@
 TID="null_01"
 ERR_CODE=0
 
+if ! _have_program fio; then
+	exit "$UBLK_SKIP_CODE"
+fi
+
 _prep_test "null" "basic IO test"
 
 dev_id=$(_add_ublk_dev -t null)
diff --git a/tools/testing/selftests/ublk/test_null_02.sh b/tools/testing/selftests/ublk/test_null_02.sh
index 5633ca876655..8accd35beb55 100755
--- a/tools/testing/selftests/ublk/test_null_02.sh
+++ b/tools/testing/selftests/ublk/test_null_02.sh
@@ -6,6 +6,10 @@
 TID="null_02"
 ERR_CODE=0
 
+if ! _have_program fio; then
+	exit "$UBLK_SKIP_CODE"
+fi
+
 _prep_test "null" "basic IO test with zero copy"
 
 dev_id=$(_add_ublk_dev -t null -z)
diff --git a/tools/testing/selftests/ublk/test_stress_05.sh b/tools/testing/selftests/ublk/test_stress_05.sh
index 566cfd90d192..274295061042 100755
--- a/tools/testing/selftests/ublk/test_stress_05.sh
+++ b/tools/testing/selftests/ublk/test_stress_05.sh
@@ -5,6 +5,10 @@
 TID="stress_05"
 ERR_CODE=0
 
+if ! _have_program fio; then
+	exit "$UBLK_SKIP_CODE"
+fi
+
 run_io_and_remove()
 {
 	local size=$1