Merge tag 'dlm-6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/linux-dlm

Pull dlm updates from David Teigland:

 - Remove some unused features (related to lock timeouts) that have been
   previously scheduled for removal

 - Fix a bug where the pending callback flag would be incorrectly
   cleared, which could potentially result in missing a completion
   callback

 - Use an unbound workqueue for dlm socket handling so that socket
   operations can be processed with less delay

 - Fix possible lockspace join connection errors with large clusters
   (e.g. over 16 nodes) caused by a small socket backlog setting

 - Use atomic bit ops for internal flags to help avoid mistakes copying
   flag values from messages

 - Fix recently introduced bug where memory for lvb data could be
   unnecessarily allocated for a lock

* tag 'dlm-6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/linux-dlm:
  fs: dlm: stop unnecessarily filling zero ms_extra bytes
  fs: dlm: switch lkb_sbflags to atomic ops
  fs: dlm: rsb hash table flag value to atomic ops
  fs: dlm: move internal flags to atomic ops
  fs: dlm: change dflags to use atomic bits
  fs: dlm: store lkb distributed flags into own value
  fs: dlm: remove DLM_IFL_LOCAL_MS flag
  fs: dlm: rename stub to local message flag
  fs: dlm: remove deprecated code parts
  DLM: increase socket backlog to avoid hangs with 16 nodes
  fs: dlm: add unbound flag to dlm_io workqueue
  fs: dlm: fix DLM_IFL_CB_PENDING gets overwritten

23 files changed, 299 insertions, 764 deletions

diff --git a/fs/dlm/Kconfig b/fs/dlm/Kconfig
index b3b86dbdc187..f82a4952769d 100644
--- a/fs/dlm/Kconfig
+++ b/fs/dlm/Kconfig
@@ -8,15 +8,6 @@ menuconfig DLM
 	A general purpose distributed lock manager for kernel or userspace
 	applications.
 
-config DLM_DEPRECATED_API
-	bool "DLM deprecated API"
-	depends on DLM
-	help
-	Enables deprecated DLM timeout features that will be removed in
-        later Linux kernel releases.
-
-	If you are unsure, say N.
-
 config DLM_DEBUG
 	bool "DLM debugging"
 	depends on DLM
diff --git a/fs/dlm/Makefile b/fs/dlm/Makefile
index 71dab733cf9a..5a471af1d1fe 100644
--- a/fs/dlm/Makefile
+++ b/fs/dlm/Makefile
@@ -17,6 +17,5 @@ dlm-y :=			ast.o \
 				requestqueue.o \
 				user.o \
 				util.o 
-dlm-$(CONFIG_DLM_DEPRECATED_API) +=	netlink.o
 dlm-$(CONFIG_DLM_DEBUG) +=	debug_fs.o
 
diff --git a/fs/dlm/ast.c b/fs/dlm/ast.c
index 26fef9945cc9..700ff2e0515a 100644
--- a/fs/dlm/ast.c
+++ b/fs/dlm/ast.c
@@ -45,7 +45,7 @@ void dlm_purge_lkb_callbacks(struct dlm_lkb *lkb)
 		kref_put(&cb->ref, dlm_release_callback);
 	}
 
-	lkb->lkb_flags &= ~DLM_IFL_CB_PENDING;
+	clear_bit(DLM_IFL_CB_PENDING_BIT, &lkb->lkb_iflags);
 
 	/* invalidate */
 	dlm_callback_set_last_ptr(&lkb->lkb_last_cast, NULL);
@@ -103,10 +103,9 @@ int dlm_enqueue_lkb_callback(struct dlm_lkb *lkb, uint32_t flags, int mode,
 	cb->sb_status = status;
 	cb->sb_flags = (sbflags & 0x000000FF);
 	kref_init(&cb->ref);
-	if (!(lkb->lkb_flags & DLM_IFL_CB_PENDING)) {
-		lkb->lkb_flags |= DLM_IFL_CB_PENDING;
+	if (!test_and_set_bit(DLM_IFL_CB_PENDING_BIT, &lkb->lkb_iflags))
 		rv = DLM_ENQUEUE_CALLBACK_NEED_SCHED;
-	}
+
 	list_add_tail(&cb->list, &lkb->lkb_callbacks);
 
 	if (flags & DLM_CB_CAST)
@@ -140,7 +139,7 @@ void dlm_add_cb(struct dlm_lkb *lkb, uint32_t flags, int mode, int status,
 	struct dlm_ls *ls = lkb->lkb_resource->res_ls;
 	int rv;
 
-	if (lkb->lkb_flags & DLM_IFL_USER) {
+	if (test_bit(DLM_DFL_USER_BIT, &lkb->lkb_dflags)) {
 		dlm_user_add_ast(lkb, flags, mode, status, sbflags);
 		return;
 	}
@@ -209,7 +208,7 @@ void dlm_callback_work(struct work_struct *work)
 		spin_lock(&lkb->lkb_cb_lock);
 		rv = dlm_dequeue_lkb_callback(lkb, &cb);
 		if (rv == DLM_DEQUEUE_CALLBACK_EMPTY) {
-			lkb->lkb_flags &= ~DLM_IFL_CB_PENDING;
+			clear_bit(DLM_IFL_CB_PENDING_BIT, &lkb->lkb_iflags);
 			spin_unlock(&lkb->lkb_cb_lock);
 			break;
 		}
diff --git a/fs/dlm/config.c b/fs/dlm/config.c
index 20b60709eccf..d31319d08581 100644
--- a/fs/dlm/config.c
+++ b/fs/dlm/config.c
@@ -75,9 +75,6 @@ struct dlm_cluster {
 	unsigned int cl_log_info;
 	unsigned int cl_protocol;
 	unsigned int cl_mark;
-#ifdef CONFIG_DLM_DEPRECATED_API
-	unsigned int cl_timewarn_cs;
-#endif
 	unsigned int cl_new_rsb_count;
 	unsigned int cl_recover_callbacks;
 	char cl_cluster_name[DLM_LOCKSPACE_LEN];
@@ -103,9 +100,6 @@ enum {
 	CLUSTER_ATTR_LOG_INFO,
 	CLUSTER_ATTR_PROTOCOL,
 	CLUSTER_ATTR_MARK,
-#ifdef CONFIG_DLM_DEPRECATED_API
-	CLUSTER_ATTR_TIMEWARN_CS,
-#endif
 	CLUSTER_ATTR_NEW_RSB_COUNT,
 	CLUSTER_ATTR_RECOVER_CALLBACKS,
 	CLUSTER_ATTR_CLUSTER_NAME,
@@ -226,9 +220,6 @@ CLUSTER_ATTR(log_debug, NULL);
 CLUSTER_ATTR(log_info, NULL);
 CLUSTER_ATTR(protocol, dlm_check_protocol_and_dlm_running);
 CLUSTER_ATTR(mark, NULL);
-#ifdef CONFIG_DLM_DEPRECATED_API
-CLUSTER_ATTR(timewarn_cs, dlm_check_zero);
-#endif
 CLUSTER_ATTR(new_rsb_count, NULL);
 CLUSTER_ATTR(recover_callbacks, NULL);
 
@@ -243,9 +234,6 @@ static struct configfs_attribute *cluster_attrs[] = {
 	[CLUSTER_ATTR_LOG_INFO] = &cluster_attr_log_info,
 	[CLUSTER_ATTR_PROTOCOL] = &cluster_attr_protocol,
 	[CLUSTER_ATTR_MARK] = &cluster_attr_mark,
-#ifdef CONFIG_DLM_DEPRECATED_API
-	[CLUSTER_ATTR_TIMEWARN_CS] = &cluster_attr_timewarn_cs,
-#endif
 	[CLUSTER_ATTR_NEW_RSB_COUNT] = &cluster_attr_new_rsb_count,
 	[CLUSTER_ATTR_RECOVER_CALLBACKS] = &cluster_attr_recover_callbacks,
 	[CLUSTER_ATTR_CLUSTER_NAME] = &cluster_attr_cluster_name,
@@ -436,9 +424,6 @@ static struct config_group *make_cluster(struct config_group *g,
 	cl->cl_log_debug = dlm_config.ci_log_debug;
 	cl->cl_log_info = dlm_config.ci_log_info;
 	cl->cl_protocol = dlm_config.ci_protocol;
-#ifdef CONFIG_DLM_DEPRECATED_API
-	cl->cl_timewarn_cs = dlm_config.ci_timewarn_cs;
-#endif
 	cl->cl_new_rsb_count = dlm_config.ci_new_rsb_count;
 	cl->cl_recover_callbacks = dlm_config.ci_recover_callbacks;
 	memcpy(cl->cl_cluster_name, dlm_config.ci_cluster_name,
@@ -959,9 +944,6 @@ int dlm_our_addr(struct sockaddr_storage *addr, int num)
 #define DEFAULT_LOG_INFO           1
 #define DEFAULT_PROTOCOL           DLM_PROTO_TCP
 #define DEFAULT_MARK               0
-#ifdef CONFIG_DLM_DEPRECATED_API
-#define DEFAULT_TIMEWARN_CS      500 /* 5 sec = 500 centiseconds */
-#endif
 #define DEFAULT_NEW_RSB_COUNT    128
 #define DEFAULT_RECOVER_CALLBACKS  0
 #define DEFAULT_CLUSTER_NAME      ""
@@ -977,9 +959,6 @@ struct dlm_config_info dlm_config = {
 	.ci_log_info = DEFAULT_LOG_INFO,
 	.ci_protocol = DEFAULT_PROTOCOL,
 	.ci_mark = DEFAULT_MARK,
-#ifdef CONFIG_DLM_DEPRECATED_API
-	.ci_timewarn_cs = DEFAULT_TIMEWARN_CS,
-#endif
 	.ci_new_rsb_count = DEFAULT_NEW_RSB_COUNT,
 	.ci_recover_callbacks = DEFAULT_RECOVER_CALLBACKS,
 	.ci_cluster_name = DEFAULT_CLUSTER_NAME
diff --git a/fs/dlm/config.h b/fs/dlm/config.h
index 55c5f2c13ebd..4c91fcca0fd4 100644
--- a/fs/dlm/config.h
+++ b/fs/dlm/config.h
@@ -37,9 +37,6 @@ struct dlm_config_info {
 	int ci_log_info;
 	int ci_protocol;
 	int ci_mark;
-#ifdef CONFIG_DLM_DEPRECATED_API
-	int ci_timewarn_cs;
-#endif
 	int ci_new_rsb_count;
 	int ci_recover_callbacks;
 	char ci_cluster_name[DLM_LOCKSPACE_LEN];
diff --git a/fs/dlm/debug_fs.c b/fs/dlm/debug_fs.c
index 8a0e1b1f74ad..a1aca41c49d0 100644
--- a/fs/dlm/debug_fs.c
+++ b/fs/dlm/debug_fs.c
@@ -170,7 +170,7 @@ static void print_format2_lock(struct seq_file *s, struct dlm_lkb *lkb,
 	u64 xid = 0;
 	u64 us;
 
-	if (lkb->lkb_flags & DLM_IFL_USER) {
+	if (test_bit(DLM_DFL_USER_BIT, &lkb->lkb_dflags)) {
 		if (lkb->lkb_ua)
 			xid = lkb->lkb_ua->xid;
 	}
@@ -188,7 +188,7 @@ static void print_format2_lock(struct seq_file *s, struct dlm_lkb *lkb,
 		   lkb->lkb_ownpid,
 		   (unsigned long long)xid,
 		   lkb->lkb_exflags,
-		   lkb->lkb_flags,
+		   dlm_iflags_val(lkb),
 		   lkb->lkb_status,
 		   lkb->lkb_grmode,
 		   lkb->lkb_rqmode,
@@ -230,7 +230,7 @@ static void print_format3_lock(struct seq_file *s, struct dlm_lkb *lkb,
 {
 	u64 xid = 0;
 
-	if (lkb->lkb_flags & DLM_IFL_USER) {
+	if (test_bit(DLM_DFL_USER_BIT, &lkb->lkb_dflags)) {
 		if (lkb->lkb_ua)
 			xid = lkb->lkb_ua->xid;
 	}
@@ -242,7 +242,7 @@ static void print_format3_lock(struct seq_file *s, struct dlm_lkb *lkb,
 		   lkb->lkb_ownpid,
 		   (unsigned long long)xid,
 		   lkb->lkb_exflags,
-		   lkb->lkb_flags,
+		   dlm_iflags_val(lkb),
 		   lkb->lkb_status,
 		   lkb->lkb_grmode,
 		   lkb->lkb_rqmode,
diff --git a/fs/dlm/dlm_internal.h b/fs/dlm/dlm_internal.h
index ab1a55337a6e..986a9d7b1f33 100644
--- a/fs/dlm/dlm_internal.h
+++ b/fs/dlm/dlm_internal.h
@@ -99,13 +99,13 @@ do { \
 }
 
 
-#define DLM_RTF_SHRINK		0x00000001
+#define DLM_RTF_SHRINK_BIT	0
 
 struct dlm_rsbtable {
 	struct rb_root		keep;
 	struct rb_root		toss;
 	spinlock_t		lock;
-	uint32_t		flags;
+	unsigned long		flags;
 };
 
 
@@ -145,9 +145,6 @@ struct dlm_args {
 	void			(*bastfn) (void *astparam, int mode);
 	int			mode;
 	struct dlm_lksb		*lksb;
-#ifdef CONFIG_DLM_DEPRECATED_API
-	unsigned long		timeout;
-#endif
 };
 
 
@@ -197,31 +194,25 @@ struct dlm_args {
 #define DLM_LKSTS_GRANTED	2
 #define DLM_LKSTS_CONVERT	3
 
-/* lkb_flags */
-
-#define DLM_IFL_MSTCPY		0x00010000
-#define DLM_IFL_RESEND		0x00020000
-#define DLM_IFL_DEAD		0x00040000
-#define DLM_IFL_OVERLAP_UNLOCK  0x00080000
-#define DLM_IFL_OVERLAP_CANCEL  0x00100000
-#define DLM_IFL_ENDOFLIFE	0x00200000
-#ifdef CONFIG_DLM_DEPRECATED_API
-#define DLM_IFL_WATCH_TIMEWARN	0x00400000
-#define DLM_IFL_TIMEOUT_CANCEL	0x00800000
-#endif
-#define DLM_IFL_DEADLOCK_CANCEL	0x01000000
-#define DLM_IFL_STUB_MS		0x02000000 /* magic number for m_flags */
-#define DLM_IFL_CB_PENDING	0x04000000
-/* least significant 2 bytes are message changed, they are full transmitted
- * but at receive side only the 2 bytes LSB will be set.
- *
- * Even wireshark dlm dissector does only evaluate the lower bytes and note
- * that they may not be used on transceiver side, we assume the higher bytes
- * are for internal use or reserved so long they are not parsed on receiver
- * side.
- */
-#define DLM_IFL_USER		0x00000001
-#define DLM_IFL_ORPHAN		0x00000002
+/* lkb_iflags */
+
+#define DLM_IFL_MSTCPY_BIT	16
+#define __DLM_IFL_MIN_BIT	DLM_IFL_MSTCPY_BIT
+#define DLM_IFL_RESEND_BIT	17
+#define DLM_IFL_DEAD_BIT	18
+#define DLM_IFL_OVERLAP_UNLOCK_BIT 19
+#define DLM_IFL_OVERLAP_CANCEL_BIT 20
+#define DLM_IFL_ENDOFLIFE_BIT	21
+#define DLM_IFL_DEADLOCK_CANCEL_BIT 24
+#define DLM_IFL_CB_PENDING_BIT	25
+#define __DLM_IFL_MAX_BIT	DLM_IFL_CB_PENDING_BIT
+
+/* lkb_dflags */
+
+#define DLM_DFL_USER_BIT	0
+#define __DLM_DFL_MIN_BIT	DLM_DFL_USER_BIT
+#define DLM_DFL_ORPHAN_BIT	1
+#define __DLM_DFL_MAX_BIT	DLM_DFL_ORPHAN_BIT
 
 #define DLM_CB_CAST		0x00000001
 #define DLM_CB_BAST		0x00000002
@@ -244,8 +235,9 @@ struct dlm_lkb {
 	uint32_t		lkb_id;		/* our lock ID */
 	uint32_t		lkb_remid;	/* lock ID on remote partner */
 	uint32_t		lkb_exflags;	/* external flags from caller */
-	uint32_t		lkb_sbflags;	/* lksb flags */
-	uint32_t		lkb_flags;	/* internal flags */
+	unsigned long		lkb_sbflags;	/* lksb flags */
+	unsigned long		lkb_dflags;	/* distributed flags */
+	unsigned long		lkb_iflags;	/* internal flags */
 	uint32_t		lkb_lvbseq;	/* lvb sequence number */
 
 	int8_t			lkb_status;     /* granted, waiting, convert */
@@ -263,11 +255,6 @@ struct dlm_lkb {
 	struct list_head	lkb_ownqueue;	/* list of locks for a process */
 	ktime_t			lkb_timestamp;
 
-#ifdef CONFIG_DLM_DEPRECATED_API
-	struct list_head	lkb_time_list;
-	unsigned long		lkb_timeout_cs;
-#endif
-
 	spinlock_t		lkb_cb_lock;
 	struct work_struct	lkb_cb_work;
 	struct list_head	lkb_cb_list; /* for ls_cb_delay or proc->asts */
@@ -583,11 +570,6 @@ struct dlm_ls {
 	struct mutex		ls_orphans_mutex;
 	struct list_head	ls_orphans;
 
-#ifdef CONFIG_DLM_DEPRECATED_API
-	struct mutex		ls_timeout_mutex;
-	struct list_head	ls_timeout;
-#endif
-
 	spinlock_t		ls_new_rsb_spin;
 	int			ls_new_rsb_count;
 	struct list_head	ls_new_rsb;	/* new rsb structs */
@@ -607,9 +589,9 @@ struct dlm_ls {
 	int			ls_slots_size;
 	struct dlm_slot		*ls_slots;
 
-	struct dlm_rsb		ls_stub_rsb;	/* for returning errors */
-	struct dlm_lkb		ls_stub_lkb;	/* for returning errors */
-	struct dlm_message	ls_stub_ms;	/* for faking a reply */
+	struct dlm_rsb		ls_local_rsb;	/* for returning errors */
+	struct dlm_lkb		ls_local_lkb;	/* for returning errors */
+	struct dlm_message	ls_local_ms;	/* for faking a reply */
 
 	struct dentry		*ls_debug_rsb_dentry; /* debugfs */
 	struct dentry		*ls_debug_waiters_dentry; /* debugfs */
@@ -701,9 +683,6 @@ struct dlm_ls {
 #define LSFL_RCOM_READY		5
 #define LSFL_RCOM_WAIT		6
 #define LSFL_UEVENT_WAIT	7
-#ifdef CONFIG_DLM_DEPRECATED_API
-#define LSFL_TIMEWARN		8
-#endif
 #define LSFL_CB_DELAY		9
 #define LSFL_NODIR		10
 
@@ -756,15 +735,76 @@ static inline int dlm_no_directory(struct dlm_ls *ls)
 	return test_bit(LSFL_NODIR, &ls->ls_flags);
 }
 
-#ifdef CONFIG_DLM_DEPRECATED_API
-int dlm_netlink_init(void);
-void dlm_netlink_exit(void);
-void dlm_timeout_warn(struct dlm_lkb *lkb);
-#else
-static inline int dlm_netlink_init(void) { return 0; }
-static inline void dlm_netlink_exit(void) { };
-static inline void dlm_timeout_warn(struct dlm_lkb *lkb) { };
-#endif
+/* takes a snapshot from dlm atomic flags */
+static inline uint32_t dlm_flags_val(const unsigned long *addr,
+				     uint32_t min, uint32_t max)
+{
+	uint32_t bit = min, val = 0;
+
+	for_each_set_bit_from(bit, addr, max + 1) {
+		val |= BIT(bit);
+	}
+
+	return val;
+}
+
+static inline uint32_t dlm_iflags_val(const struct dlm_lkb *lkb)
+{
+	return dlm_flags_val(&lkb->lkb_iflags, __DLM_IFL_MIN_BIT,
+			     __DLM_IFL_MAX_BIT);
+}
+
+static inline uint32_t dlm_dflags_val(const struct dlm_lkb *lkb)
+{
+	return dlm_flags_val(&lkb->lkb_dflags, __DLM_DFL_MIN_BIT,
+			     __DLM_DFL_MAX_BIT);
+}
+
+/* coming from UAPI header
+ *
+ * TODO:
+ * Move this to UAPI header and let other values point to them and use BIT()
+ */
+#define DLM_SBF_DEMOTED_BIT	0
+#define __DLM_SBF_MIN_BIT	DLM_SBF_DEMOTED_BIT
+#define DLM_SBF_VALNOTVALID_BIT	1
+#define DLM_SBF_ALTMODE_BIT	2
+#define __DLM_SBF_MAX_BIT	DLM_SBF_ALTMODE_BIT
+
+static inline uint32_t dlm_sbflags_val(const struct dlm_lkb *lkb)
+{
+	/* be sure the next person updates this */
+	BUILD_BUG_ON(BIT(__DLM_SBF_MAX_BIT) != DLM_SBF_ALTMODE);
+
+	return dlm_flags_val(&lkb->lkb_sbflags, __DLM_SBF_MIN_BIT,
+			     __DLM_SBF_MAX_BIT);
+}
+
+static inline void dlm_set_flags_val(unsigned long *addr, uint32_t val,
+				     uint32_t min, uint32_t max)
+{
+	uint32_t bit;
+
+	for (bit = min; bit < (max + 1); bit++) {
+		if (val & BIT(bit))
+			set_bit(bit, addr);
+		else
+			clear_bit(bit, addr);
+	}
+}
+
+static inline void dlm_set_dflags_val(struct dlm_lkb *lkb, uint32_t val)
+{
+	dlm_set_flags_val(&lkb->lkb_dflags, val, __DLM_DFL_MIN_BIT,
+			  __DLM_DFL_MAX_BIT);
+}
+
+static inline void dlm_set_sbflags_val(struct dlm_lkb *lkb, uint32_t val)
+{
+	dlm_set_flags_val(&lkb->lkb_sbflags, val, __DLM_SBF_MIN_BIT,
+			  __DLM_SBF_MAX_BIT);
+}
+
 int dlm_plock_init(void);
 void dlm_plock_exit(void);
 
diff --git a/fs/dlm/lock.c b/fs/dlm/lock.c
index e1adfa5aed05..debf8a55ad7d 100644
--- a/fs/dlm/lock.c
+++ b/fs/dlm/lock.c
@@ -86,10 +86,9 @@ static int send_remove(struct dlm_rsb *r);
 static int _request_lock(struct dlm_rsb *r, struct dlm_lkb *lkb);
 static int _cancel_lock(struct dlm_rsb *r, struct dlm_lkb *lkb);
 static void __receive_convert_reply(struct dlm_rsb *r, struct dlm_lkb *lkb,
-				    struct dlm_message *ms);
+				    struct dlm_message *ms, bool local);
 static int receive_extralen(struct dlm_message *ms);
 static void do_purge(struct dlm_ls *ls, int nodeid, int pid);
-static void del_timeout(struct dlm_lkb *lkb);
 static void toss_rsb(struct kref *kref);
 
 /*
@@ -164,7 +163,7 @@ void dlm_print_lkb(struct dlm_lkb *lkb)
 	printk(KERN_ERR "lkb: nodeid %d id %x remid %x exflags %x flags %x "
 	       "sts %d rq %d gr %d wait_type %d wait_nodeid %d seq %llu\n",
 	       lkb->lkb_nodeid, lkb->lkb_id, lkb->lkb_remid, lkb->lkb_exflags,
-	       lkb->lkb_flags, lkb->lkb_status, lkb->lkb_rqmode,
+	       dlm_iflags_val(lkb), lkb->lkb_status, lkb->lkb_rqmode,
 	       lkb->lkb_grmode, lkb->lkb_wait_type, lkb->lkb_wait_nodeid,
 	       (unsigned long long)lkb->lkb_recover_seq);
 }
@@ -229,12 +228,12 @@ static inline int force_blocking_asts(struct dlm_lkb *lkb)
 
 static inline int is_demoted(struct dlm_lkb *lkb)
 {
-	return (lkb->lkb_sbflags & DLM_SBF_DEMOTED);
+	return test_bit(DLM_SBF_DEMOTED_BIT, &lkb->lkb_sbflags);
 }
 
 static inline int is_altmode(struct dlm_lkb *lkb)
 {
-	return (lkb->lkb_sbflags & DLM_SBF_ALTMODE);
+	return test_bit(DLM_SBF_ALTMODE_BIT, &lkb->lkb_sbflags);
 }
 
 static inline int is_granted(struct dlm_lkb *lkb)
@@ -250,12 +249,13 @@ static inline int is_remote(struct dlm_rsb *r)
 
 static inline int is_process_copy(struct dlm_lkb *lkb)
 {
-	return (lkb->lkb_nodeid && !(lkb->lkb_flags & DLM_IFL_MSTCPY));
+	return lkb->lkb_nodeid &&
+	       !test_bit(DLM_IFL_MSTCPY_BIT, &lkb->lkb_iflags);
 }
 
 static inline int is_master_copy(struct dlm_lkb *lkb)
 {
-	return (lkb->lkb_flags & DLM_IFL_MSTCPY) ? 1 : 0;
+	return test_bit(DLM_IFL_MSTCPY_BIT, &lkb->lkb_iflags);
 }
 
 static inline int middle_conversion(struct dlm_lkb *lkb)
@@ -273,18 +273,18 @@ static inline int down_conversion(struct dlm_lkb *lkb)
 
 static inline int is_overlap_unlock(struct dlm_lkb *lkb)
 {
-	return lkb->lkb_flags & DLM_IFL_OVERLAP_UNLOCK;
+	return test_bit(DLM_IFL_OVERLAP_UNLOCK_BIT, &lkb->lkb_iflags);
 }
 
 static inline int is_overlap_cancel(struct dlm_lkb *lkb)
 {
-	return lkb->lkb_flags & DLM_IFL_OVERLAP_CANCEL;
+	return test_bit(DLM_IFL_OVERLAP_CANCEL_BIT, &lkb->lkb_iflags);
 }
 
 static inline int is_overlap(struct dlm_lkb *lkb)
 {
-	return (lkb->lkb_flags & (DLM_IFL_OVERLAP_UNLOCK |
-				  DLM_IFL_OVERLAP_CANCEL));
+	return test_bit(DLM_IFL_OVERLAP_UNLOCK_BIT, &lkb->lkb_iflags) ||
+	       test_bit(DLM_IFL_OVERLAP_CANCEL_BIT, &lkb->lkb_iflags);
 }
 
 static void queue_cast(struct dlm_rsb *r, struct dlm_lkb *lkb, int rv)
@@ -292,25 +292,13 @@ static void queue_cast(struct dlm_rsb *r, struct dlm_lkb *lkb, int rv)
 	if (is_master_copy(lkb))
 		return;
 
-	del_timeout(lkb);
-
 	DLM_ASSERT(lkb->lkb_lksb, dlm_print_lkb(lkb););
 
-#ifdef CONFIG_DLM_DEPRECATED_API
-	/* if the operation was a cancel, then return -DLM_ECANCEL, if a
-	   timeout caused the cancel then return -ETIMEDOUT */
-	if (rv == -DLM_ECANCEL && (lkb->lkb_flags & DLM_IFL_TIMEOUT_CANCEL)) {
-		lkb->lkb_flags &= ~DLM_IFL_TIMEOUT_CANCEL;
-		rv = -ETIMEDOUT;
-	}
-#endif
-
-	if (rv == -DLM_ECANCEL && (lkb->lkb_flags & DLM_IFL_DEADLOCK_CANCEL)) {
-		lkb->lkb_flags &= ~DLM_IFL_DEADLOCK_CANCEL;
+	if (rv == -DLM_ECANCEL &&
+	    test_and_clear_bit(DLM_IFL_DEADLOCK_CANCEL_BIT, &lkb->lkb_iflags))
 		rv = -EDEADLK;
-	}
 
-	dlm_add_cb(lkb, DLM_CB_CAST, lkb->lkb_grmode, rv, lkb->lkb_sbflags);
+	dlm_add_cb(lkb, DLM_CB_CAST, lkb->lkb_grmode, rv, dlm_sbflags_val(lkb));
 }
 
 static inline void queue_cast_overlap(struct dlm_rsb *r, struct dlm_lkb *lkb)
@@ -1151,7 +1139,7 @@ static void toss_rsb(struct kref *kref)
 	rb_erase(&r->res_hashnode, &ls->ls_rsbtbl[r->res_bucket].keep);
 	rsb_insert(r, &ls->ls_rsbtbl[r->res_bucket].toss);
 	r->res_toss_time = jiffies;
-	ls->ls_rsbtbl[r->res_bucket].flags |= DLM_RTF_SHRINK;
+	set_bit(DLM_RTF_SHRINK_BIT, &ls->ls_rsbtbl[r->res_bucket].flags);
 	if (r->res_lvbptr) {
 		dlm_free_lvb(r->res_lvbptr);
 		r->res_lvbptr = NULL;
@@ -1215,9 +1203,6 @@ static int _create_lkb(struct dlm_ls *ls, struct dlm_lkb **lkb_ret,
 	kref_init(&lkb->lkb_ref);
 	INIT_LIST_HEAD(&lkb->lkb_ownqueue);
 	INIT_LIST_HEAD(&lkb->lkb_rsb_lookup);
-#ifdef CONFIG_DLM_DEPRECATED_API
-	INIT_LIST_HEAD(&lkb->lkb_time_list);
-#endif
 	INIT_LIST_HEAD(&lkb->lkb_cb_list);
 	INIT_LIST_HEAD(&lkb->lkb_callbacks);
 	spin_lock_init(&lkb->lkb_cb_lock);
@@ -1434,10 +1419,10 @@ static int add_to_waiters(struct dlm_lkb *lkb, int mstype, int to_nodeid)
 	if (lkb->lkb_wait_type || is_overlap_cancel(lkb)) {
 		switch (mstype) {
 		case DLM_MSG_UNLOCK:
-			lkb->lkb_flags |= DLM_IFL_OVERLAP_UNLOCK;
+			set_bit(DLM_IFL_OVERLAP_UNLOCK_BIT, &lkb->lkb_iflags);
 			break;
 		case DLM_MSG_CANCEL:
-			lkb->lkb_flags |= DLM_IFL_OVERLAP_CANCEL;
+			set_bit(DLM_IFL_OVERLAP_CANCEL_BIT, &lkb->lkb_iflags);
 			break;
 		default:
 			error = -EBUSY;
@@ -1448,7 +1433,7 @@ static int add_to_waiters(struct dlm_lkb *lkb, int mstype, int to_nodeid)
 
 		log_debug(ls, "addwait %x cur %d overlap %d count %d f %x",
 			  lkb->lkb_id, lkb->lkb_wait_type, mstype,
-			  lkb->lkb_wait_count, lkb->lkb_flags);
+			  lkb->lkb_wait_count, dlm_iflags_val(lkb));
 		goto out;
 	}
 
@@ -1464,7 +1449,7 @@ static int add_to_waiters(struct dlm_lkb *lkb, int mstype, int to_nodeid)
  out:
 	if (error)
 		log_error(ls, "addwait error %x %d flags %x %d %d %s",
-			  lkb->lkb_id, error, lkb->lkb_flags, mstype,
+			  lkb->lkb_id, error, dlm_iflags_val(lkb), mstype,
 			  lkb->lkb_wait_type, lkb->lkb_resource->res_name);
 	mutex_unlock(&ls->ls_waiters_mutex);
 	return error;
@@ -1481,16 +1466,16 @@ static int _remove_from_waiters(struct dlm_lkb *lkb, int mstype,
 	struct dlm_ls *ls = lkb->lkb_resource->res_ls;
 	int overlap_done = 0;
 
-	if (is_overlap_unlock(lkb) && (mstype == DLM_MSG_UNLOCK_REPLY)) {
+	if (mstype == DLM_MSG_UNLOCK_REPLY &&
+	    test_and_clear_bit(DLM_IFL_OVERLAP_UNLOCK_BIT, &lkb->lkb_iflags)) {
 		log_debug(ls, "remwait %x unlock_reply overlap", lkb->lkb_id);
-		lkb->lkb_flags &= ~DLM_IFL_OVERLAP_UNLOCK;
 		overlap_done = 1;
 		goto out_del;
 	}
 
-	if (is_overlap_cancel(lkb) && (mstype == DLM_MSG_CANCEL_REPLY)) {
+	if (mstype == DLM_MSG_CANCEL_REPLY &&
+	    test_and_clear_bit(DLM_IFL_OVERLAP_CANCEL_BIT, &lkb->lkb_iflags)) {
 		log_debug(ls, "remwait %x cancel_reply overlap", lkb->lkb_id);
-		lkb->lkb_flags &= ~DLM_IFL_OVERLAP_CANCEL;
 		overlap_done = 1;
 		goto out_del;
 	}
@@ -1514,12 +1499,11 @@ static int _remove_from_waiters(struct dlm_lkb *lkb, int mstype,
 	   lingering state of the cancel and fail with -EBUSY. */
 
 	if ((mstype == DLM_MSG_CONVERT_REPLY) &&
-	    (lkb->lkb_wait_type == DLM_MSG_CONVERT) &&
-	    is_overlap_cancel(lkb) && ms && !ms->m_result) {
+	    (lkb->lkb_wait_type == DLM_MSG_CONVERT) && ms && !ms->m_result &&
+	    test_and_clear_bit(DLM_IFL_OVERLAP_CANCEL_BIT, &lkb->lkb_iflags)) {
 		log_debug(ls, "remwait %x convert_reply zap overlap_cancel",
 			  lkb->lkb_id);
 		lkb->lkb_wait_type = 0;
-		lkb->lkb_flags &= ~DLM_IFL_OVERLAP_CANCEL;
 		lkb->lkb_wait_count--;
 		unhold_lkb(lkb);
 		goto out_del;
@@ -1535,7 +1519,7 @@ static int _remove_from_waiters(struct dlm_lkb *lkb, int mstype,
 
 	log_error(ls, "remwait error %x remote %d %x msg %d flags %x no wait",
 		  lkb->lkb_id, ms ? le32_to_cpu(ms->m_header.h_nodeid) : 0,
-		  lkb->lkb_remid, mstype, lkb->lkb_flags);
+		  lkb->lkb_remid, mstype, dlm_iflags_val(lkb));
 	return -1;
 
  out_del:
@@ -1554,7 +1538,7 @@ static int _remove_from_waiters(struct dlm_lkb *lkb, int mstype,
 
 	DLM_ASSERT(lkb->lkb_wait_count, dlm_print_lkb(lkb););
 
-	lkb->lkb_flags &= ~DLM_IFL_RESEND;
+	clear_bit(DLM_IFL_RESEND_BIT, &lkb->lkb_iflags);
 	lkb->lkb_wait_count--;
 	if (!lkb->lkb_wait_count)
 		list_del_init(&lkb->lkb_wait_reply);
@@ -1573,18 +1557,19 @@ static int remove_from_waiters(struct dlm_lkb *lkb, int mstype)
 	return error;
 }
 
-/* Handles situations where we might be processing a "fake" or "stub" reply in
+/* Handles situations where we might be processing a "fake" or "local" reply in
    which we can't try to take waiters_mutex again. */
 
-static int remove_from_waiters_ms(struct dlm_lkb *lkb, struct dlm_message *ms)
+static int remove_from_waiters_ms(struct dlm_lkb *lkb, struct dlm_message *ms,
+				  bool local)
 {
 	struct dlm_ls *ls = lkb->lkb_resource->res_ls;
 	int error;
 
-	if (ms->m_flags != cpu_to_le32(DLM_IFL_STUB_MS))
+	if (!local)
 		mutex_lock(&ls->ls_waiters_mutex);
 	error = _remove_from_waiters(lkb, le32_to_cpu(ms->m_type), ms);
-	if (ms->m_flags != cpu_to_le32(DLM_IFL_STUB_MS))
+	if (!local)
 		mutex_unlock(&ls->ls_waiters_mutex);
 	return error;
 }
@@ -1603,7 +1588,7 @@ static void shrink_bucket(struct dlm_ls *ls, int b)
 
 	spin_lock(&ls->ls_rsbtbl[b].lock);
 
-	if (!(ls->ls_rsbtbl[b].flags & DLM_RTF_SHRINK)) {
+	if (!test_bit(DLM_RTF_SHRINK_BIT, &ls->ls_rsbtbl[b].flags)) {
 		spin_unlock(&ls->ls_rsbtbl[b].lock);
 		return;
 	}
@@ -1658,9 +1643,9 @@ static void shrink_bucket(struct dlm_ls *ls, int b)
 	}
 
 	if (need_shrink)
-		ls->ls_rsbtbl[b].flags |= DLM_RTF_SHRINK;
+		set_bit(DLM_RTF_SHRINK_BIT, &ls->ls_rsbtbl[b].flags);
 	else
-		ls->ls_rsbtbl[b].flags &= ~DLM_RTF_SHRINK;
+		clear_bit(DLM_RTF_SHRINK_BIT, &ls->ls_rsbtbl[b].flags);
 	spin_unlock(&ls->ls_rsbtbl[b].lock);
 
 	/*
@@ -1735,133 +1720,6 @@ void dlm_scan_rsbs(struct dlm_ls *ls)
 	}
 }
 
-#ifdef CONFIG_DLM_DEPRECATED_API
-static void add_timeout(struct dlm_lkb *lkb)
-{
-	struct dlm_ls *ls = lkb->lkb_resource->res_ls;
-
-	if (is_master_copy(lkb))
-		return;
-
-	if (test_bit(LSFL_TIMEWARN, &ls->ls_flags) &&
-	    !(lkb->lkb_exflags & DLM_LKF_NODLCKWT)) {
-		lkb->lkb_flags |= DLM_IFL_WATCH_TIMEWARN;
-		goto add_it;
-	}
-	if (lkb->lkb_exflags & DLM_LKF_TIMEOUT)
-		goto add_it;
-	return;
-
- add_it:
-	DLM_ASSERT(list_empty(&lkb->lkb_time_list), dlm_print_lkb(lkb););
-	mutex_lock(&ls->ls_timeout_mutex);
-	hold_lkb(lkb);
-	list_add_tail(&lkb->lkb_time_list, &ls->ls_timeout);
-	mutex_unlock(&ls->ls_timeout_mutex);
-}
-
-static void del_timeout(struct dlm_lkb *lkb)
-{
-	struct dlm_ls *ls = lkb->lkb_resource->res_ls;
-
-	mutex_lock(&ls->ls_timeout_mutex);
-	if (!list_empty(&lkb->lkb_time_list)) {
-		list_del_init(&lkb->lkb_time_list);
-		unhold_lkb(lkb);
-	}
-	mutex_unlock(&ls->ls_timeout_mutex);
-}
-
-/* FIXME: is it safe to look at lkb_exflags, lkb_flags, lkb_timestamp, and
-   lkb_lksb_timeout without lock_rsb?  Note: we can't lock timeout_mutex
-   and then lock rsb because of lock ordering in add_timeout.  We may need
-   to specify some special timeout-related bits in the lkb that are just to
-   be accessed under the timeout_mutex. */
-
-void dlm_scan_timeout(struct dlm_ls *ls)
-{
-	struct dlm_rsb *r;
-	struct dlm_lkb *lkb = NULL, *iter;
-	int do_cancel, do_warn;
-	s64 wait_us;
-
-	for (;;) {
-		if (dlm_locking_stopped(ls))
-			break;
-
-		do_cancel = 0;
-		do_warn = 0;
-		mutex_lock(&ls->ls_timeout_mutex);
-		list_for_each_entry(iter, &ls->ls_timeout, lkb_time_list) {
-
-			wait_us = ktime_to_us(ktime_sub(ktime_get(),
-							iter->lkb_timestamp));
-
-			if ((iter->lkb_exflags & DLM_LKF_TIMEOUT) &&
-			    wait_us >= (iter->lkb_timeout_cs * 10000))
-				do_cancel = 1;
-
-			if ((iter->lkb_flags & DLM_IFL_WATCH_TIMEWARN) &&
-			    wait_us >= dlm_config.ci_timewarn_cs * 10000)
-				do_warn = 1;
-
-			if (!do_cancel && !do_warn)
-				continue;
-			hold_lkb(iter);
-			lkb = iter;
-			break;
-		}
-		mutex_unlock(&ls->ls_timeout_mutex);
-
-		if (!lkb)
-			break;
-
-		r = lkb->lkb_resource;
-		hold_rsb(r);
-		lock_rsb(r);
-
-		if (do_warn) {
-			/* clear flag so we only warn once */
-			lkb->lkb_flags &= ~DLM_IFL_WATCH_TIMEWARN;
-			if (!(lkb->lkb_exflags & DLM_LKF_TIMEOUT))
-				del_timeout(lkb);
-			dlm_timeout_warn(lkb);
-		}
-
-		if (do_cancel) {
-			log_debug(ls, "timeout cancel %x node %d %s",
-				  lkb->lkb_id, lkb->lkb_nodeid, r->res_name);
-			lkb->lkb_flags &= ~DLM_IFL_WATCH_TIMEWARN;
-			lkb->lkb_flags |= DLM_IFL_TIMEOUT_CANCEL;
-			del_timeout(lkb);
-			_cancel_lock(r, lkb);
-		}
-
-		unlock_rsb(r);
-		unhold_rsb(r);
-		dlm_put_lkb(lkb);
-	}
-}
-
-/* This is only called by dlm_recoverd, and we rely on dlm_ls_stop() stopping
-   dlm_recoverd before checking/setting ls_recover_begin. */
-
-void dlm_adjust_timeouts(struct dlm_ls *ls)
-{
-	struct dlm_lkb *lkb;
-	u64 adj_us = jiffies_to_usecs(jiffies - ls->ls_recover_begin);
-
-	ls->ls_recover_begin = 0;
-	mutex_lock(&ls->ls_timeout_mutex);
-	list_for_each_entry(lkb, &ls->ls_timeout, lkb_time_list)
-		lkb->lkb_timestamp = ktime_add_us(lkb->lkb_timestamp, adj_us);
-	mutex_unlock(&ls->ls_timeout_mutex);
-}
-#else
-static void add_timeout(struct dlm_lkb *lkb) { }
-static void del_timeout(struct dlm_lkb *lkb) { }
-#endif
-
 /* lkb is master or local copy */
 
 static void set_lvb_lock(struct dlm_rsb *r, struct dlm_lkb *lkb)
@@ -1912,7 +1770,7 @@ static void set_lvb_lock(struct dlm_rsb *r, struct dlm_lkb *lkb)
 	}
 
 	if (rsb_flag(r, RSB_VALNOTVALID))
-		lkb->lkb_sbflags |= DLM_SBF_VALNOTVALID;
+		set_bit(DLM_SBF_VALNOTVALID_BIT, &lkb->lkb_sbflags);
 }
 
 static void set_lvb_unlock(struct dlm_rsb *r, struct dlm_lkb *lkb)
@@ -2384,7 +2242,7 @@ static int can_be_granted(struct dlm_rsb *r, struct dlm_lkb *lkb, int now,
 	    conversion_deadlock_detect(r, lkb)) {
 		if (lkb->lkb_exflags & DLM_LKF_CONVDEADLK) {
 			lkb->lkb_grmode = DLM_LOCK_NL;
-			lkb->lkb_sbflags |= DLM_SBF_DEMOTED;
+			set_bit(DLM_SBF_DEMOTED_BIT, &lkb->lkb_sbflags);
 		} else if (err) {
 			*err = -EDEADLK;
 		} else {
@@ -2411,7 +2269,7 @@ static int can_be_granted(struct dlm_rsb *r, struct dlm_lkb *lkb, int now,
 		lkb->lkb_rqmode = alt;
 		rv = _can_be_granted(r, lkb, now, 0);
 		if (rv)
-			lkb->lkb_sbflags |= DLM_SBF_ALTMODE;
+			set_bit(DLM_SBF_ALTMODE_BIT, &lkb->lkb_sbflags);
 		else
 			lkb->lkb_rqmode = rqmode;
 	}
@@ -2723,20 +2581,11 @@ static void confirm_master(struct dlm_rsb *r, int error)
 	}
 }
 
-#ifdef CONFIG_DLM_DEPRECATED_API
-static int set_lock_args(int mode, struct dlm_lksb *lksb, uint32_t flags,
-			 int namelen, unsigned long timeout_cs,
-			 void (*ast) (void *astparam),
-			 void *astparam,
-			 void (*bast) (void *astparam, int mode),
-			 struct dlm_args *args)
-#else
 static int set_lock_args(int mode, struct dlm_lksb *lksb, uint32_t flags,
 			 int namelen, void (*ast)(void *astparam),
 			 void *astparam,
 			 void (*bast)(void *astparam, int mode),
 			 struct dlm_args *args)
-#endif
 {
 	int rv = -EINVAL;
 
@@ -2789,9 +2638,6 @@ static int set_lock_args(int mode, struct dlm_lksb *lksb, uint32_t flags,
 	args->astfn = ast;
 	args->astparam = astparam;
 	args->bastfn = bast;
-#ifdef CONFIG_DLM_DEPRECATED_API
-	args->timeout = timeout_cs;
-#endif
 	args->mode = mode;
 	args->lksb = lksb;
 	rv = 0;
@@ -2830,7 +2676,7 @@ static int validate_lock_args(struct dlm_ls *ls, struct dlm_lkb *lkb,
 			goto out;
 
 		rv = -EINVAL;
-		if (lkb->lkb_flags & DLM_IFL_MSTCPY)
+		if (test_bit(DLM_IFL_MSTCPY_BIT, &lkb->lkb_iflags))
 			goto out;
 
 		if (args->flags & DLM_LKF_QUECVT &&
@@ -2839,7 +2685,7 @@ static int validate_lock_args(struct dlm_ls *ls, struct dlm_lkb *lkb,
 	}
 
 	lkb->lkb_exflags = args->flags;
-	lkb->lkb_sbflags = 0;
+	dlm_set_sbflags_val(lkb, 0);
 	lkb->lkb_astfn = args->astfn;
 	lkb->lkb_astparam = args->astparam;
 	lkb->lkb_bastfn = args->bastfn;
@@ -2847,9 +2693,6 @@ static int validate_lock_args(struct dlm_ls *ls, struct dlm_lkb *lkb,
 	lkb->lkb_lksb = args->lksb;
 	lkb->lkb_lvbptr = args->lksb->sb_lvbptr;
 	lkb->lkb_ownpid = (int) current->pid;
-#ifdef CONFIG_DLM_DEPRECATED_API
-	lkb->lkb_timeout_cs = args->timeout;
-#endif
 	rv = 0;
  out:
 	switch (rv) {
@@ -2859,13 +2702,13 @@ static int validate_lock_args(struct dlm_ls *ls, struct dlm_lkb *lkb,
 		/* annoy the user because dlm usage is wrong */
 		WARN_ON(1);
 		log_error(ls, "%s %d %x %x %x %d %d %s", __func__,
-			  rv, lkb->lkb_id, lkb->lkb_flags, args->flags,
+			  rv, lkb->lkb_id, dlm_iflags_val(lkb), args->flags,
 			  lkb->lkb_status, lkb->lkb_wait_type,
 			  lkb->lkb_resource->res_name);
 		break;
 	default:
 		log_debug(ls, "%s %d %x %x %x %d %d %s", __func__,
-			  rv, lkb->lkb_id, lkb->lkb_flags, args->flags,
+			  rv, lkb->lkb_id, dlm_iflags_val(lkb), args->flags,
 			  lkb->lkb_status, lkb->lkb_wait_type,
 			  lkb->lkb_resource->res_name);
 		break;
@@ -2908,7 +2751,7 @@ static int validate_unlock_args(struct dlm_lkb *lkb, struct dlm_args *args)
 	}
 
 	rv = -EINVAL;
-	if (lkb->lkb_flags & DLM_IFL_MSTCPY) {
+	if (test_bit(DLM_IFL_MSTCPY_BIT, &lkb->lkb_iflags)) {
 		log_error(ls, "unlock on MSTCPY %x", lkb->lkb_id);
 		dlm_print_lkb(lkb);
 		goto out;
@@ -2919,7 +2762,7 @@ static int validate_unlock_args(struct dlm_lkb *lkb, struct dlm_args *args)
 	 * locks; return same error as if the lkid had not been found at all
 	 */
 
-	if (lkb->lkb_flags & DLM_IFL_ENDOFLIFE) {
+	if (test_bit(DLM_IFL_ENDOFLIFE_BIT, &lkb->lkb_iflags)) {
 		log_debug(ls, "unlock on ENDOFLIFE %x", lkb->lkb_id);
 		rv = -ENOENT;
 		goto out;
@@ -2934,11 +2777,8 @@ static int validate_unlock_args(struct dlm_lkb *lkb, struct dlm_args *args)
 		if (is_overlap(lkb))
 			goto out;
 
-		/* don't let scand try to do a cancel */
-		del_timeout(lkb);
-
-		if (lkb->lkb_flags & DLM_IFL_RESEND) {
-			lkb->lkb_flags |= DLM_IFL_OVERLAP_CANCEL;
+		if (test_bit(DLM_IFL_RESEND_BIT, &lkb->lkb_iflags)) {
+			set_bit(DLM_IFL_OVERLAP_CANCEL_BIT, &lkb->lkb_iflags);
 			rv = -EBUSY;
 			goto out;
 		}
@@ -2953,7 +2793,7 @@ static int validate_unlock_args(struct dlm_lkb *lkb, struct dlm_args *args)
 		switch (lkb->lkb_wait_type) {
 		case DLM_MSG_LOOKUP:
 		case DLM_MSG_REQUEST:
-			lkb->lkb_flags |= DLM_IFL_OVERLAP_CANCEL;
+			set_bit(DLM_IFL_OVERLAP_CANCEL_BIT, &lkb->lkb_iflags);
 			rv = -EBUSY;
 			goto out;
 		case DLM_MSG_UNLOCK:
@@ -2975,11 +2815,8 @@ static int validate_unlock_args(struct dlm_lkb *lkb, struct dlm_args *args)
 		if (is_overlap_unlock(lkb))
 			goto out;
 
-		/* don't let scand try to do a cancel */
-		del_timeout(lkb);
-
-		if (lkb->lkb_flags & DLM_IFL_RESEND) {
-			lkb->lkb_flags |= DLM_IFL_OVERLAP_UNLOCK;
+		if (test_bit(DLM_IFL_RESEND_BIT, &lkb->lkb_iflags)) {
+			set_bit(DLM_IFL_OVERLAP_UNLOCK_BIT, &lkb->lkb_iflags);
 			rv = -EBUSY;
 			goto out;
 		}
@@ -2987,7 +2824,7 @@ static int validate_unlock_args(struct dlm_lkb *lkb, struct dlm_args *args)
 		switch (lkb->lkb_wait_type) {
 		case DLM_MSG_LOOKUP:
 		case DLM_MSG_REQUEST:
-			lkb->lkb_flags |= DLM_IFL_OVERLAP_UNLOCK;
+			set_bit(DLM_IFL_OVERLAP_UNLOCK_BIT, &lkb->lkb_iflags);
 			rv = -EBUSY;
 			goto out;
 		case DLM_MSG_UNLOCK:
@@ -2999,7 +2836,7 @@ static int validate_unlock_args(struct dlm_lkb *lkb, struct dlm_args *args)
  out_ok:
 	/* an overlapping op shouldn't blow away exflags from other op */
 	lkb->lkb_exflags |= args->flags;
-	lkb->lkb_sbflags = 0;
+	dlm_set_sbflags_val(lkb, 0);
 	lkb->lkb_astparam = args->astparam;
 	rv = 0;
  out:
@@ -3010,13 +2847,13 @@ static int validate_unlock_args(struct dlm_lkb *lkb, struct dlm_args *args)
 		/* annoy the user because dlm usage is wrong */
 		WARN_ON(1);
 		log_error(ls, "%s %d %x %x %x %x %d %s", __func__, rv,
-			  lkb->lkb_id, lkb->lkb_flags, lkb->lkb_exflags,
+			  lkb->lkb_id, dlm_iflags_val(lkb), lkb->lkb_exflags,
 			  args->flags, lkb->lkb_wait_type,
 			  lkb->lkb_resource->res_name);
 		break;
 	default:
 		log_debug(ls, "%s %d %x %x %x %x %d %s", __func__, rv,
-			  lkb->lkb_id, lkb->lkb_flags, lkb->lkb_exflags,
+			  lkb->lkb_id, dlm_iflags_val(lkb), lkb->lkb_exflags,
 			  args->flags, lkb->lkb_wait_type,
 			  lkb->lkb_resource->res_name);
 		break;
@@ -3045,7 +2882,6 @@ static int do_request(struct dlm_rsb *r, struct dlm_lkb *lkb)
 	if (can_be_queued(lkb)) {
 		error = -EINPROGRESS;
 		add_lkb(r, lkb, DLM_LKSTS_WAITING);
-		add_timeout(lkb);
 		goto out;
 	}
 
@@ -3114,7 +2950,6 @@ static int do_convert(struct dlm_rsb *r, struct dlm_lkb *lkb)
 		error = -EINPROGRESS;
 		del_lkb(r, lkb);
 		add_lkb(r, lkb, DLM_LKSTS_CONVERT);
-		add_timeout(lkb);
 		goto out;
 	}
 
@@ -3401,13 +3236,8 @@ int dlm_lock(dlm_lockspace_t *lockspace,
 
 	trace_dlm_lock_start(ls, lkb, name, namelen, mode, flags);
 
-#ifdef CONFIG_DLM_DEPRECATED_API
-	error = set_lock_args(mode, lksb, flags, namelen, 0, ast,
-			      astarg, bast, &args);
-#else
 	error = set_lock_args(mode, lksb, flags, namelen, ast, astarg, bast,
 			      &args);
-#endif
 	if (error)
 		goto out_put;
 
@@ -3551,7 +3381,7 @@ static int create_message(struct dlm_rsb *r, struct dlm_lkb *lkb,
 	case DLM_MSG_REQUEST_REPLY:
 	case DLM_MSG_CONVERT_REPLY:
 	case DLM_MSG_GRANT:
-		if (lkb && lkb->lkb_lvbptr)
+		if (lkb && lkb->lkb_lvbptr && (lkb->lkb_exflags & DLM_LKF_VALBLK))
 			mb_len += r->res_ls->ls_lvblen;
 		break;
 	}
@@ -3578,8 +3408,8 @@ static void send_args(struct dlm_rsb *r, struct dlm_lkb *lkb,
 	ms->m_lkid     = cpu_to_le32(lkb->lkb_id);
 	ms->m_remid    = cpu_to_le32(lkb->lkb_remid);
 	ms->m_exflags  = cpu_to_le32(lkb->lkb_exflags);
-	ms->m_sbflags  = cpu_to_le32(lkb->lkb_sbflags);
-	ms->m_flags    = cpu_to_le32(lkb->lkb_flags);
+	ms->m_sbflags  = cpu_to_le32(dlm_sbflags_val(lkb));
+	ms->m_flags    = cpu_to_le32(dlm_dflags_val(lkb));
 	ms->m_lvbseq   = cpu_to_le32(lkb->lkb_lvbseq);
 	ms->m_status   = cpu_to_le32(lkb->lkb_status);
 	ms->m_grmode   = cpu_to_le32(lkb->lkb_grmode);
@@ -3656,10 +3486,9 @@ static int send_convert(struct dlm_rsb *r, struct dlm_lkb *lkb)
 	/* down conversions go without a reply from the master */
 	if (!error && down_conversion(lkb)) {
 		remove_from_waiters(lkb, DLM_MSG_CONVERT_REPLY);
-		r->res_ls->ls_stub_ms.m_flags = cpu_to_le32(DLM_IFL_STUB_MS);
-		r->res_ls->ls_stub_ms.m_type = cpu_to_le32(DLM_MSG_CONVERT_REPLY);
-		r->res_ls->ls_stub_ms.m_result = 0;
-		__receive_convert_reply(r, lkb, &r->res_ls->ls_stub_ms);
+		r->res_ls->ls_local_ms.m_type = cpu_to_le32(DLM_MSG_CONVERT_REPLY);
+		r->res_ls->ls_local_ms.m_result = 0;
+		__receive_convert_reply(r, lkb, &r->res_ls->ls_local_ms, true);
 	}
 
 	return error;
@@ -3818,7 +3647,7 @@ static int send_cancel_reply(struct dlm_rsb *r, struct dlm_lkb *lkb, int rv)
 static int send_lookup_reply(struct dlm_ls *ls, struct dlm_message *ms_in,
 			     int ret_nodeid, int rv)
 {
-	struct dlm_rsb *r = &ls->ls_stub_rsb;
+	struct dlm_rsb *r = &ls->ls_local_rsb;
 	struct dlm_message *ms;
 	struct dlm_mhandle *mh;
 	int error, nodeid = le32_to_cpu(ms_in->m_header.h_nodeid);
@@ -3844,19 +3673,18 @@ static int send_lookup_reply(struct dlm_ls *ls, struct dlm_message *ms_in,
 static void receive_flags(struct dlm_lkb *lkb, struct dlm_message *ms)
 {
 	lkb->lkb_exflags = le32_to_cpu(ms->m_exflags);
-	lkb->lkb_sbflags = le32_to_cpu(ms->m_sbflags);
-	lkb->lkb_flags = (lkb->lkb_flags & 0xFFFF0000) |
-			  (le32_to_cpu(ms->m_flags) & 0x0000FFFF);
+	dlm_set_sbflags_val(lkb, le32_to_cpu(ms->m_sbflags));
+	dlm_set_dflags_val(lkb, le32_to_cpu(ms->m_flags));
 }
 
-static void receive_flags_reply(struct dlm_lkb *lkb, struct dlm_message *ms)
+static void receive_flags_reply(struct dlm_lkb *lkb, struct dlm_message *ms,
+				bool local)
 {
-	if (ms->m_flags == cpu_to_le32(DLM_IFL_STUB_MS))
+	if (local)
 		return;
 
-	lkb->lkb_sbflags = le32_to_cpu(ms->m_sbflags);
-	lkb->lkb_flags = (lkb->lkb_flags & 0xFFFF0000) |
-			 (le32_to_cpu(ms->m_flags) & 0x0000FFFF);
+	dlm_set_sbflags_val(lkb, le32_to_cpu(ms->m_sbflags));
+	dlm_set_dflags_val(lkb, le32_to_cpu(ms->m_flags));
 }
 
 static int receive_extralen(struct dlm_message *ms)
@@ -3938,12 +3766,12 @@ static int receive_unlock_args(struct dlm_ls *ls, struct dlm_lkb *lkb,
 	return 0;
 }
 
-/* We fill in the stub-lkb fields with the info that send_xxxx_reply()
+/* We fill in the local-lkb fields with the info that send_xxxx_reply()
    uses to send a reply and that the remote end uses to process the reply. */
 
-static void setup_stub_lkb(struct dlm_ls *ls, struct dlm_message *ms)
+static void setup_local_lkb(struct dlm_ls *ls, struct dlm_message *ms)
 {
-	struct dlm_lkb *lkb = &ls->ls_stub_lkb;
+	struct dlm_lkb *lkb = &ls->ls_local_lkb;
 	lkb->lkb_nodeid = le32_to_cpu(ms->m_header.h_nodeid);
 	lkb->lkb_remid = le32_to_cpu(ms->m_lkid);
 }
@@ -3957,8 +3785,8 @@ static int validate_message(struct dlm_lkb *lkb, struct dlm_message *ms)
 	int error = 0;
 
 	/* currently mixing of user/kernel locks are not supported */
-	if (ms->m_flags & cpu_to_le32(DLM_IFL_USER) &&
-	    ~lkb->lkb_flags & DLM_IFL_USER) {
+	if (ms->m_flags & cpu_to_le32(BIT(DLM_DFL_USER_BIT)) &&
+	    !test_bit(DLM_DFL_USER_BIT, &lkb->lkb_dflags)) {
 		log_error(lkb->lkb_resource->res_ls,
 			  "got user dlm message for a kernel lock");
 		error = -EINVAL;
@@ -3998,7 +3826,8 @@ out:
 		log_error(lkb->lkb_resource->res_ls,
 			  "ignore invalid message %d from %d %x %x %x %d",
 			  le32_to_cpu(ms->m_type), from, lkb->lkb_id,
-			  lkb->lkb_remid, lkb->lkb_flags, lkb->lkb_nodeid);
+			  lkb->lkb_remid, dlm_iflags_val(lkb),
+			  lkb->lkb_nodeid);
 	return error;
 }
 
@@ -4016,7 +3845,7 @@ static int receive_request(struct dlm_ls *ls, struct dlm_message *ms)
 		goto fail;
 
 	receive_flags(lkb, ms);
-	lkb->lkb_flags |= DLM_IFL_MSTCPY;
+	set_bit(DLM_IFL_MSTCPY_BIT, &lkb->lkb_iflags);
 	error = receive_request_args(ls, lkb, ms);
 	if (error) {
 		__put_lkb(ls, lkb);
@@ -4076,8 +3905,8 @@ static int receive_request(struct dlm_ls *ls, struct dlm_message *ms)
 			  le32_to_cpu(ms->m_lkid), from_nodeid, error);
 	}
 
-	setup_stub_lkb(ls, ms);
-	send_request_reply(&ls->ls_stub_rsb, &ls->ls_stub_lkb, error);
+	setup_local_lkb(ls, ms);
+	send_request_reply(&ls->ls_local_rsb, &ls->ls_local_lkb, error);
 	return error;
 }
 
@@ -4132,8 +3961,8 @@ static int receive_convert(struct dlm_ls *ls, struct dlm_message *ms)
 	return 0;
 
  fail:
-	setup_stub_lkb(ls, ms);
-	send_convert_reply(&ls->ls_stub_rsb, &ls->ls_stub_lkb, error);
+	setup_local_lkb(ls, ms);
+	send_convert_reply(&ls->ls_local_rsb, &ls->ls_local_lkb, error);
 	return error;
 }
 
@@ -4184,8 +4013,8 @@ static int receive_unlock(struct dlm_ls *ls, struct dlm_message *ms)
 	return 0;
 
  fail:
-	setup_stub_lkb(ls, ms);
-	send_unlock_reply(&ls->ls_stub_rsb, &ls->ls_stub_lkb, error);
+	setup_local_lkb(ls, ms);
+	send_unlock_reply(&ls->ls_local_rsb, &ls->ls_local_lkb, error);
 	return error;
 }
 
@@ -4220,8 +4049,8 @@ static int receive_cancel(struct dlm_ls *ls, struct dlm_message *ms)
 	return 0;
 
  fail:
-	setup_stub_lkb(ls, ms);
-	send_cancel_reply(&ls->ls_stub_rsb, &ls->ls_stub_lkb, error);
+	setup_local_lkb(ls, ms);
+	send_cancel_reply(&ls->ls_local_rsb, &ls->ls_local_lkb, error);
 	return error;
 }
 
@@ -4244,7 +4073,7 @@ static int receive_grant(struct dlm_ls *ls, struct dlm_message *ms)
 	if (error)
 		goto out;
 
-	receive_flags_reply(lkb, ms);
+	receive_flags_reply(lkb, ms, false);
 	if (is_altmode(lkb))
 		munge_altmode(lkb, ms);
 	grant_lock_pc(r, lkb, ms);
@@ -4448,13 +4277,12 @@ static int receive_request_reply(struct dlm_ls *ls, struct dlm_message *ms)
 	case -EINPROGRESS:
 	case 0:
 		/* request was queued or granted on remote master */
-		receive_flags_reply(lkb, ms);
+		receive_flags_reply(lkb, ms, false);
 		lkb->lkb_remid = le32_to_cpu(ms->m_lkid);
 		if (is_altmode(lkb))
 			munge_altmode(lkb, ms);
 		if (result) {
 			add_lkb(r, lkb, DLM_LKSTS_WAITING);
-			add_timeout(lkb);
 		} else {
 			grant_lock_pc(r, lkb, ms);
 			queue_cast(r, lkb, 0);
@@ -4496,20 +4324,21 @@ static int receive_request_reply(struct dlm_ls *ls, struct dlm_message *ms)
 			  lkb->lkb_id, result);
 	}
 
-	if (is_overlap_unlock(lkb) && (result == 0 || result == -EINPROGRESS)) {
+	if ((result == 0 || result == -EINPROGRESS) &&
+	    test_and_clear_bit(DLM_IFL_OVERLAP_UNLOCK_BIT, &lkb->lkb_iflags)) {
 		log_debug(ls, "receive_request_reply %x result %d unlock",
 			  lkb->lkb_id, result);
-		lkb->lkb_flags &= ~DLM_IFL_OVERLAP_UNLOCK;
-		lkb->lkb_flags &= ~DLM_IFL_OVERLAP_CANCEL;
+		clear_bit(DLM_IFL_OVERLAP_CANCEL_BIT, &lkb->lkb_iflags);
 		send_unlock(r, lkb);
-	} else if (is_overlap_cancel(lkb) && (result == -EINPROGRESS)) {
+	} else if ((result == -EINPROGRESS) &&
+		   test_and_clear_bit(DLM_IFL_OVERLAP_CANCEL_BIT,
+				      &lkb->lkb_iflags)) {
 		log_debug(ls, "receive_request_reply %x cancel", lkb->lkb_id);
-		lkb->lkb_flags &= ~DLM_IFL_OVERLAP_UNLOCK;
-		lkb->lkb_flags &= ~DLM_IFL_OVERLAP_CANCEL;
+		clear_bit(DLM_IFL_OVERLAP_UNLOCK_BIT, &lkb->lkb_iflags);
 		send_cancel(r, lkb);
 	} else {
-		lkb->lkb_flags &= ~DLM_IFL_OVERLAP_CANCEL;
-		lkb->lkb_flags &= ~DLM_IFL_OVERLAP_UNLOCK;
+		clear_bit(DLM_IFL_OVERLAP_CANCEL_BIT, &lkb->lkb_iflags);
+		clear_bit(DLM_IFL_OVERLAP_UNLOCK_BIT, &lkb->lkb_iflags);
 	}
  out:
 	unlock_rsb(r);
@@ -4519,7 +4348,7 @@ static int receive_request_reply(struct dlm_ls *ls, struct dlm_message *ms)
 }
 
 static void __receive_convert_reply(struct dlm_rsb *r, struct dlm_lkb *lkb,
-				    struct dlm_message *ms)
+				    struct dlm_message *ms, bool local)
 {
 	/* this is the value returned from do_convert() on the master */
 	switch (from_dlm_errno(le32_to_cpu(ms->m_result))) {
@@ -4529,24 +4358,23 @@ static void __receive_convert_reply(struct dlm_rsb *r, struct dlm_lkb *lkb,
 		break;
 
 	case -EDEADLK:
-		receive_flags_reply(lkb, ms);
+		receive_flags_reply(lkb, ms, local);
 		revert_lock_pc(r, lkb);
 		queue_cast(r, lkb, -EDEADLK);
 		break;
 
 	case -EINPROGRESS:
 		/* convert was queued on remote master */
-		receive_flags_reply(lkb, ms);
+		receive_flags_reply(lkb, ms, local);
 		if (is_demoted(lkb))
 			munge_demoted(lkb);
 		del_lkb(r, lkb);
 		add_lkb(r, lkb, DLM_LKSTS_CONVERT);
-		add_timeout(lkb);
 		break;
 
 	case 0:
 		/* convert was granted on remote master */
-		receive_flags_reply(lkb, ms);
+		receive_flags_reply(lkb, ms, local);
 		if (is_demoted(lkb))
 			munge_demoted(lkb);
 		grant_lock_pc(r, lkb, ms);
@@ -4563,7 +4391,8 @@ static void __receive_convert_reply(struct dlm_rsb *r, struct dlm_lkb *lkb,
 	}
 }
 
-static void _receive_convert_reply(struct dlm_lkb *lkb, struct dlm_message *ms)
+static void _receive_convert_reply(struct dlm_lkb *lkb, struct dlm_message *ms,
+				   bool local)
 {
 	struct dlm_rsb *r = lkb->lkb_resource;
 	int error;
@@ -4575,12 +4404,12 @@ static void _receive_convert_reply(struct dlm_lkb *lkb, struct dlm_message *ms)
 	if (error)
 		goto out;
 
-	/* stub reply can happen with waiters_mutex held */
-	error = remove_from_waiters_ms(lkb, ms);
+	/* local reply can happen with waiters_mutex held */
+	error = remove_from_waiters_ms(lkb, ms, local);
 	if (error)
 		goto out;
 
-	__receive_convert_reply(r, lkb, ms);
+	__receive_convert_reply(r, lkb, ms, local);
  out:
 	unlock_rsb(r);
 	put_rsb(r);
@@ -4595,12 +4424,13 @@ static int receive_convert_reply(struct dlm_ls *ls, struct dlm_message *ms)
 	if (error)
 		return error;
 
-	_receive_convert_reply(lkb, ms);
+	_receive_convert_reply(lkb, ms, false);
 	dlm_put_lkb(lkb);
 	return 0;
 }
 
-static void _receive_unlock_reply(struct dlm_lkb *lkb, struct dlm_message *ms)
+static void _receive_unlock_reply(struct dlm_lkb *lkb, struct dlm_message *ms,
+				  bool local)
 {
 	struct dlm_rsb *r = lkb->lkb_resource;
 	int error;
@@ -4612,8 +4442,8 @@ static void _receive_unlock_reply(struct dlm_lkb *lkb, struct dlm_message *ms)
 	if (error)
 		goto out;
 
-	/* stub reply can happen with waiters_mutex held */
-	error = remove_from_waiters_ms(lkb, ms);
+	/* local reply can happen with waiters_mutex held */
+	error = remove_from_waiters_ms(lkb, ms, local);
 	if (error)
 		goto out;
 
@@ -4621,7 +4451,7 @@ static void _receive_unlock_reply(struct dlm_lkb *lkb, struct dlm_message *ms)
 
 	switch (from_dlm_errno(le32_to_cpu(ms->m_result))) {
 	case -DLM_EUNLOCK:
-		receive_flags_reply(lkb, ms);
+		receive_flags_reply(lkb, ms, local);
 		remove_lock_pc(r, lkb);
 		queue_cast(r, lkb, -DLM_EUNLOCK);
 		break;
@@ -4645,12 +4475,13 @@ static int receive_unlock_reply(struct dlm_ls *ls, struct dlm_message *ms)
 	if (error)
 		return error;
 
-	_receive_unlock_reply(lkb, ms);
+	_receive_unlock_reply(lkb, ms, false);
 	dlm_put_lkb(lkb);
 	return 0;
 }
 
-static void _receive_cancel_reply(struct dlm_lkb *lkb, struct dlm_message *ms)
+static void _receive_cancel_reply(struct dlm_lkb *lkb, struct dlm_message *ms,
+				  bool local)
 {
 	struct dlm_rsb *r = lkb->lkb_resource;
 	int error;
@@ -4662,8 +4493,8 @@ static void _receive_cancel_reply(struct dlm_lkb *lkb, struct dlm_message *ms)
 	if (error)
 		goto out;
 
-	/* stub reply can happen with waiters_mutex held */
-	error = remove_from_waiters_ms(lkb, ms);
+	/* local reply can happen with waiters_mutex held */
+	error = remove_from_waiters_ms(lkb, ms, local);
 	if (error)
 		goto out;
 
@@ -4671,7 +4502,7 @@ static void _receive_cancel_reply(struct dlm_lkb *lkb, struct dlm_message *ms)
 
 	switch (from_dlm_errno(le32_to_cpu(ms->m_result))) {
 	case -DLM_ECANCEL:
-		receive_flags_reply(lkb, ms);
+		receive_flags_reply(lkb, ms, local);
 		revert_lock_pc(r, lkb);
 		queue_cast(r, lkb, -DLM_ECANCEL);
 		break;
@@ -4696,7 +4527,7 @@ static int receive_cancel_reply(struct dlm_ls *ls, struct dlm_message *ms)
 	if (error)
 		return error;
 
-	_receive_cancel_reply(lkb, ms);
+	_receive_cancel_reply(lkb, ms, false);
 	dlm_put_lkb(lkb);
 	return 0;
 }
@@ -4763,7 +4594,7 @@ static void receive_lookup_reply(struct dlm_ls *ls, struct dlm_message *ms)
 
 	if (is_overlap(lkb)) {
 		log_debug(ls, "receive_lookup_reply %x unlock %x",
-			  lkb->lkb_id, lkb->lkb_flags);
+			  lkb->lkb_id, dlm_iflags_val(lkb));
 		queue_cast_overlap(r, lkb);
 		unhold_lkb(lkb); /* undoes create_lkb() */
 		goto out_list;
@@ -5006,16 +4837,15 @@ void dlm_receive_buffer(union dlm_packet *p, int nodeid)
 }
 
 static void recover_convert_waiter(struct dlm_ls *ls, struct dlm_lkb *lkb,
-				   struct dlm_message *ms_stub)
+				   struct dlm_message *ms_local)
 {
 	if (middle_conversion(lkb)) {
 		hold_lkb(lkb);
-		memset(ms_stub, 0, sizeof(struct dlm_message));
-		ms_stub->m_flags = cpu_to_le32(DLM_IFL_STUB_MS);
-		ms_stub->m_type = cpu_to_le32(DLM_MSG_CONVERT_REPLY);
-		ms_stub->m_result = cpu_to_le32(to_dlm_errno(-EINPROGRESS));
-		ms_stub->m_header.h_nodeid = cpu_to_le32(lkb->lkb_nodeid);
-		_receive_convert_reply(lkb, ms_stub);
+		memset(ms_local, 0, sizeof(struct dlm_message));
+		ms_local->m_type = cpu_to_le32(DLM_MSG_CONVERT_REPLY);
+		ms_local->m_result = cpu_to_le32(to_dlm_errno(-EINPROGRESS));
+		ms_local->m_header.h_nodeid = cpu_to_le32(lkb->lkb_nodeid);
+		_receive_convert_reply(lkb, ms_local, true);
 
 		/* Same special case as in receive_rcom_lock_args() */
 		lkb->lkb_grmode = DLM_LOCK_IV;
@@ -5023,7 +4853,7 @@ static void recover_convert_waiter(struct dlm_ls *ls, struct dlm_lkb *lkb,
 		unhold_lkb(lkb);
 
 	} else if (lkb->lkb_rqmode >= lkb->lkb_grmode) {
-		lkb->lkb_flags |= DLM_IFL_RESEND;
+		set_bit(DLM_IFL_RESEND_BIT, &lkb->lkb_iflags);
 	}
 
 	/* lkb->lkb_rqmode < lkb->lkb_grmode shouldn't happen since down
@@ -5054,12 +4884,12 @@ static int waiter_needs_recovery(struct dlm_ls *ls, struct dlm_lkb *lkb,
 void dlm_recover_waiters_pre(struct dlm_ls *ls)
 {
 	struct dlm_lkb *lkb, *safe;
-	struct dlm_message *ms_stub;
-	int wait_type, stub_unlock_result, stub_cancel_result;
+	struct dlm_message *ms_local;
+	int wait_type, local_unlock_result, local_cancel_result;
 	int dir_nodeid;
 
-	ms_stub = kmalloc(sizeof(*ms_stub), GFP_KERNEL);
-	if (!ms_stub)
+	ms_local = kmalloc(sizeof(*ms_local), GFP_KERNEL);
+	if (!ms_local)
 		return;
 
 	mutex_lock(&ls->ls_waiters_mutex);
@@ -5087,7 +4917,7 @@ void dlm_recover_waiters_pre(struct dlm_ls *ls)
 		   resent after recovery is done */
 
 		if (lkb->lkb_wait_type == DLM_MSG_LOOKUP) {
-			lkb->lkb_flags |= DLM_IFL_RESEND;
+			set_bit(DLM_IFL_RESEND_BIT, &lkb->lkb_iflags);
 			continue;
 		}
 
@@ -5095,8 +4925,8 @@ void dlm_recover_waiters_pre(struct dlm_ls *ls)
 			continue;
 
 		wait_type = lkb->lkb_wait_type;
-		stub_unlock_result = -DLM_EUNLOCK;
-		stub_cancel_result = -DLM_ECANCEL;
+		local_unlock_result = -DLM_EUNLOCK;
+		local_cancel_result = -DLM_ECANCEL;
 
 		/* Main reply may have been received leaving a zero wait_type,
 		   but a reply for the overlapping op may not have been
@@ -5107,48 +4937,46 @@ void dlm_recover_waiters_pre(struct dlm_ls *ls)
 			if (is_overlap_cancel(lkb)) {
 				wait_type = DLM_MSG_CANCEL;
 				if (lkb->lkb_grmode == DLM_LOCK_IV)
-					stub_cancel_result = 0;
+					local_cancel_result = 0;
 			}
 			if (is_overlap_unlock(lkb)) {
 				wait_type = DLM_MSG_UNLOCK;
 				if (lkb->lkb_grmode == DLM_LOCK_IV)
-					stub_unlock_result = -ENOENT;
+					local_unlock_result = -ENOENT;
 			}
 
 			log_debug(ls, "rwpre overlap %x %x %d %d %d",
-				  lkb->lkb_id, lkb->lkb_flags, wait_type,
-				  stub_cancel_result, stub_unlock_result);
+				  lkb->lkb_id, dlm_iflags_val(lkb), wait_type,
+				  local_cancel_result, local_unlock_result);
 		}
 
 		switch (wait_type) {
 
 		case DLM_MSG_REQUEST:
-			lkb->lkb_flags |= DLM_IFL_RESEND;
+			set_bit(DLM_IFL_RESEND_BIT, &lkb->lkb_iflags);
 			break;
 
 		case DLM_MSG_CONVERT:
-			recover_convert_waiter(ls, lkb, ms_stub);
+			recover_convert_waiter(ls, lkb, ms_local);
 			break;
 
 		case DLM_MSG_UNLOCK:
 			hold_lkb(lkb);
-			memset(ms_stub, 0, sizeof(struct dlm_message));
-			ms_stub->m_flags = cpu_to_le32(DLM_IFL_STUB_MS);
-			ms_stub->m_type = cpu_to_le32(DLM_MSG_UNLOCK_REPLY);
-			ms_stub->m_result = cpu_to_le32(to_dlm_errno(stub_unlock_result));
-			ms_stub->m_header.h_nodeid = cpu_to_le32(lkb->lkb_nodeid);
-			_receive_unlock_reply(lkb, ms_stub);
+			memset(ms_local, 0, sizeof(struct dlm_message));
+			ms_local->m_type = cpu_to_le32(DLM_MSG_UNLOCK_REPLY);
+			ms_local->m_result = cpu_to_le32(to_dlm_errno(local_unlock_result));
+			ms_local->m_header.h_nodeid = cpu_to_le32(lkb->lkb_nodeid);
+			_receive_unlock_reply(lkb, ms_local, true);
 			dlm_put_lkb(lkb);
 			break;
 
 		case DLM_MSG_CANCEL:
 			hold_lkb(lkb);
-			memset(ms_stub, 0, sizeof(struct dlm_message));
-			ms_stub->m_flags = cpu_to_le32(DLM_IFL_STUB_MS);
-			ms_stub->m_type = cpu_to_le32(DLM_MSG_CANCEL_REPLY);
-			ms_stub->m_result = cpu_to_le32(to_dlm_errno(stub_cancel_result));
-			ms_stub->m_header.h_nodeid = cpu_to_le32(lkb->lkb_nodeid);
-			_receive_cancel_reply(lkb, ms_stub);
+			memset(ms_local, 0, sizeof(struct dlm_message));
+			ms_local->m_type = cpu_to_le32(DLM_MSG_CANCEL_REPLY);
+			ms_local->m_result = cpu_to_le32(to_dlm_errno(local_cancel_result));
+			ms_local->m_header.h_nodeid = cpu_to_le32(lkb->lkb_nodeid);
+			_receive_cancel_reply(lkb, ms_local, true);
 			dlm_put_lkb(lkb);
 			break;
 
@@ -5159,7 +4987,7 @@ void dlm_recover_waiters_pre(struct dlm_ls *ls)
 		schedule();
 	}
 	mutex_unlock(&ls->ls_waiters_mutex);
-	kfree(ms_stub);
+	kfree(ms_local);
 }
 
 static struct dlm_lkb *find_resend_waiter(struct dlm_ls *ls)
@@ -5168,7 +4996,7 @@ static struct dlm_lkb *find_resend_waiter(struct dlm_ls *ls)
 
 	mutex_lock(&ls->ls_waiters_mutex);
 	list_for_each_entry(iter, &ls->ls_waiters, lkb_wait_reply) {
-		if (iter->lkb_flags & DLM_IFL_RESEND) {
+		if (test_bit(DLM_IFL_RESEND_BIT, &iter->lkb_iflags)) {
 			hold_lkb(iter);
 			lkb = iter;
 			break;
@@ -5217,8 +5045,10 @@ int dlm_recover_waiters_post(struct dlm_ls *ls)
 		lock_rsb(r);
 
 		mstype = lkb->lkb_wait_type;
-		oc = is_overlap_cancel(lkb);
-		ou = is_overlap_unlock(lkb);
+		oc = test_and_clear_bit(DLM_IFL_OVERLAP_CANCEL_BIT,
+					&lkb->lkb_iflags);
+		ou = test_and_clear_bit(DLM_IFL_OVERLAP_UNLOCK_BIT,
+					&lkb->lkb_iflags);
 		err = 0;
 
 		log_debug(ls, "waiter %x remote %x msg %d r_nodeid %d "
@@ -5231,9 +5061,7 @@ int dlm_recover_waiters_post(struct dlm_ls *ls)
 		   previous op or overlap op on this lock.  First, do a big
 		   remove_from_waiters() for all previous ops. */
 
-		lkb->lkb_flags &= ~DLM_IFL_RESEND;
-		lkb->lkb_flags &= ~DLM_IFL_OVERLAP_UNLOCK;
-		lkb->lkb_flags &= ~DLM_IFL_OVERLAP_CANCEL;
+		clear_bit(DLM_IFL_RESEND_BIT, &lkb->lkb_iflags);
 		lkb->lkb_wait_type = 0;
 		/* drop all wait_count references we still
 		 * hold a reference for this iteration.
@@ -5518,8 +5346,8 @@ static int receive_rcom_lock_args(struct dlm_ls *ls, struct dlm_lkb *lkb,
 	lkb->lkb_ownpid = le32_to_cpu(rl->rl_ownpid);
 	lkb->lkb_remid = le32_to_cpu(rl->rl_lkid);
 	lkb->lkb_exflags = le32_to_cpu(rl->rl_exflags);
-	lkb->lkb_flags = le32_to_cpu(rl->rl_flags) & 0x0000FFFF;
-	lkb->lkb_flags |= DLM_IFL_MSTCPY;
+	dlm_set_dflags_val(lkb, le32_to_cpu(rl->rl_flags));
+	set_bit(DLM_IFL_MSTCPY_BIT, &lkb->lkb_iflags);
 	lkb->lkb_lvbseq = le32_to_cpu(rl->rl_lvbseq);
 	lkb->lkb_rqmode = rl->rl_rqmode;
 	lkb->lkb_grmode = rl->rl_grmode;
@@ -5708,14 +5536,8 @@ int dlm_recover_process_copy(struct dlm_ls *ls, struct dlm_rcom *rc)
 	return 0;
 }
 
-#ifdef CONFIG_DLM_DEPRECATED_API
-int dlm_user_request(struct dlm_ls *ls, struct dlm_user_args *ua,
-		     int mode, uint32_t flags, void *name, unsigned int namelen,
-		     unsigned long timeout_cs)
-#else
 int dlm_user_request(struct dlm_ls *ls, struct dlm_user_args *ua,
 		     int mode, uint32_t flags, void *name, unsigned int namelen)
-#endif
 {
 	struct dlm_lkb *lkb;
 	struct dlm_args args;
@@ -5740,13 +5562,8 @@ int dlm_user_request(struct dlm_ls *ls, struct dlm_user_args *ua,
 			goto out_put;
 		}
 	}
-#ifdef CONFIG_DLM_DEPRECATED_API
-	error = set_lock_args(mode, &ua->lksb, flags, namelen, timeout_cs,
-			      fake_astfn, ua, fake_bastfn, &args);
-#else
 	error = set_lock_args(mode, &ua->lksb, flags, namelen, fake_astfn, ua,
 			      fake_bastfn, &args);
-#endif
 	if (error) {
 		kfree(ua->lksb.sb_lvbptr);
 		ua->lksb.sb_lvbptr = NULL;
@@ -5755,9 +5572,9 @@ int dlm_user_request(struct dlm_ls *ls, struct dlm_user_args *ua,
 	}
 
 	/* After ua is attached to lkb it will be freed by dlm_free_lkb().
-	   When DLM_IFL_USER is set, the dlm knows that this is a userspace
+	   When DLM_DFL_USER_BIT is set, the dlm knows that this is a userspace
 	   lock and that lkb_astparam is the dlm_user_args structure. */
-	lkb->lkb_flags |= DLM_IFL_USER;
+	set_bit(DLM_DFL_USER_BIT, &lkb->lkb_dflags);
 	error = request_lock(ls, lkb, name, namelen, &args);
 
 	switch (error) {
@@ -5788,14 +5605,8 @@ int dlm_user_request(struct dlm_ls *ls, struct dlm_user_args *ua,
 	return error;
 }
 
-#ifdef CONFIG_DLM_DEPRECATED_API
-int dlm_user_convert(struct dlm_ls *ls, struct dlm_user_args *ua_tmp,
-		     int mode, uint32_t flags, uint32_t lkid, char *lvb_in,
-		     unsigned long timeout_cs)
-#else
 int dlm_user_convert(struct dlm_ls *ls, struct dlm_user_args *ua_tmp,
 		     int mode, uint32_t flags, uint32_t lkid, char *lvb_in)
-#endif
 {
 	struct dlm_lkb *lkb;
 	struct dlm_args args;
@@ -5832,13 +5643,8 @@ int dlm_user_convert(struct dlm_ls *ls, struct dlm_user_args *ua_tmp,
 	ua->bastaddr = ua_tmp->bastaddr;
 	ua->user_lksb = ua_tmp->user_lksb;
 
-#ifdef CONFIG_DLM_DEPRECATED_API
-	error = set_lock_args(mode, &ua->lksb, flags, 0, timeout_cs,
-			      fake_astfn, ua, fake_bastfn, &args);
-#else
 	error = set_lock_args(mode, &ua->lksb, flags, 0, fake_astfn, ua,
 			      fake_bastfn, &args);
-#endif
 	if (error)
 		goto out_put;
 
@@ -5883,7 +5689,7 @@ int dlm_user_adopt_orphan(struct dlm_ls *ls, struct dlm_user_args *ua_tmp,
 
 		lkb = iter;
 		list_del_init(&iter->lkb_ownqueue);
-		iter->lkb_flags &= ~DLM_IFL_ORPHAN;
+		clear_bit(DLM_DFL_ORPHAN_BIT, &iter->lkb_dflags);
 		*lkid = iter->lkb_id;
 		break;
 	}
@@ -6050,7 +5856,7 @@ int dlm_user_deadlock(struct dlm_ls *ls, uint32_t flags, uint32_t lkid)
 	error = validate_unlock_args(lkb, &args);
 	if (error)
 		goto out_r;
-	lkb->lkb_flags |= DLM_IFL_DEADLOCK_CANCEL;
+	set_bit(DLM_IFL_DEADLOCK_CANCEL_BIT, &lkb->lkb_iflags);
 
 	error = _cancel_lock(r, lkb);
  out_r:
@@ -6127,9 +5933,9 @@ static struct dlm_lkb *del_proc_lock(struct dlm_ls *ls,
 	list_del_init(&lkb->lkb_ownqueue);
 
 	if (lkb->lkb_exflags & DLM_LKF_PERSISTENT)
-		lkb->lkb_flags |= DLM_IFL_ORPHAN;
+		set_bit(DLM_DFL_ORPHAN_BIT, &lkb->lkb_dflags);
 	else
-		lkb->lkb_flags |= DLM_IFL_DEAD;
+		set_bit(DLM_IFL_DEAD_BIT, &lkb->lkb_iflags);
  out:
 	spin_unlock(&ls->ls_clear_proc_locks);
 	return lkb;
@@ -6155,7 +5961,6 @@ void dlm_clear_proc_locks(struct dlm_ls *ls, struct dlm_user_proc *proc)
 		lkb = del_proc_lock(ls, proc);
 		if (!lkb)
 			break;
-		del_timeout(lkb);
 		if (lkb->lkb_exflags & DLM_LKF_PERSISTENT)
 			orphan_proc_lock(ls, lkb);
 		else
@@ -6173,7 +5978,7 @@ void dlm_clear_proc_locks(struct dlm_ls *ls, struct dlm_user_proc *proc)
 	/* in-progress unlocks */
 	list_for_each_entry_safe(lkb, safe, &proc->unlocking, lkb_ownqueue) {
 		list_del_init(&lkb->lkb_ownqueue);
-		lkb->lkb_flags |= DLM_IFL_DEAD;
+		set_bit(DLM_IFL_DEAD_BIT, &lkb->lkb_iflags);
 		dlm_put_lkb(lkb);
 	}
 
@@ -6204,7 +6009,7 @@ static void purge_proc_locks(struct dlm_ls *ls, struct dlm_user_proc *proc)
 		if (!lkb)
 			break;
 
-		lkb->lkb_flags |= DLM_IFL_DEAD;
+		set_bit(DLM_IFL_DEAD_BIT, &lkb->lkb_iflags);
 		unlock_proc_lock(ls, lkb);
 		dlm_put_lkb(lkb); /* ref from proc->locks list */
 	}
@@ -6212,7 +6017,7 @@ static void purge_proc_locks(struct dlm_ls *ls, struct dlm_user_proc *proc)
 	spin_lock(&proc->locks_spin);
 	list_for_each_entry_safe(lkb, safe, &proc->unlocking, lkb_ownqueue) {
 		list_del_init(&lkb->lkb_ownqueue);
-		lkb->lkb_flags |= DLM_IFL_DEAD;
+		set_bit(DLM_IFL_DEAD_BIT, &lkb->lkb_iflags);
 		dlm_put_lkb(lkb);
 	}
 	spin_unlock(&proc->locks_spin);
@@ -6279,7 +6084,7 @@ int dlm_user_purge(struct dlm_ls *ls, struct dlm_user_proc *proc,
 
 /* debug functionality */
 int dlm_debug_add_lkb(struct dlm_ls *ls, uint32_t lkb_id, char *name, int len,
-		      int lkb_nodeid, unsigned int lkb_flags, int lkb_status)
+		      int lkb_nodeid, unsigned int lkb_dflags, int lkb_status)
 {
 	struct dlm_lksb *lksb;
 	struct dlm_lkb *lkb;
@@ -6287,7 +6092,7 @@ int dlm_debug_add_lkb(struct dlm_ls *ls, uint32_t lkb_id, char *name, int len,
 	int error;
 
 	/* we currently can't set a valid user lock */
-	if (lkb_flags & DLM_IFL_USER)
+	if (lkb_dflags & BIT(DLM_DFL_USER_BIT))
 		return -EOPNOTSUPP;
 
 	lksb = kzalloc(sizeof(*lksb), GFP_NOFS);
@@ -6300,11 +6105,11 @@ int dlm_debug_add_lkb(struct dlm_ls *ls, uint32_t lkb_id, char *name, int len,
 		return error;
 	}
 
-	lkb->lkb_flags = lkb_flags;
+	dlm_set_dflags_val(lkb, lkb_dflags);
 	lkb->lkb_nodeid = lkb_nodeid;
 	lkb->lkb_lksb = lksb;
 	/* user specific pointer, just don't have it NULL for kernel locks */
-	if (~lkb_flags & DLM_IFL_USER)
+	if (~lkb_dflags & BIT(DLM_DFL_USER_BIT))
 		lkb->lkb_astparam = (void *)0xDEADBEEF;
 
 	error = find_rsb(ls, name, len, 0, R_REQUEST, &r);
diff --git a/fs/dlm/lock.h b/fs/dlm/lock.h
index 40c76b5544da..aa5ad44d902b 100644
--- a/fs/dlm/lock.h
+++ b/fs/dlm/lock.h
@@ -25,14 +25,6 @@ void dlm_scan_rsbs(struct dlm_ls *ls);
 int dlm_lock_recovery_try(struct dlm_ls *ls);
 void dlm_unlock_recovery(struct dlm_ls *ls);
 
-#ifdef CONFIG_DLM_DEPRECATED_API
-void dlm_scan_timeout(struct dlm_ls *ls);
-void dlm_adjust_timeouts(struct dlm_ls *ls);
-#else
-static inline void dlm_scan_timeout(struct dlm_ls *ls) { }
-static inline void dlm_adjust_timeouts(struct dlm_ls *ls) { }
-#endif
-
 int dlm_master_lookup(struct dlm_ls *ls, int nodeid, char *name, int len,
 		      unsigned int flags, int *r_nodeid, int *result);
 
@@ -47,19 +39,10 @@ void dlm_recover_waiters_pre(struct dlm_ls *ls);
 int dlm_recover_master_copy(struct dlm_ls *ls, struct dlm_rcom *rc);
 int dlm_recover_process_copy(struct dlm_ls *ls, struct dlm_rcom *rc);
 
-#ifdef CONFIG_DLM_DEPRECATED_API
-int dlm_user_request(struct dlm_ls *ls, struct dlm_user_args *ua, int mode,
-	uint32_t flags, void *name, unsigned int namelen,
-	unsigned long timeout_cs);
-int dlm_user_convert(struct dlm_ls *ls, struct dlm_user_args *ua_tmp,
-	int mode, uint32_t flags, uint32_t lkid, char *lvb_in,
-	unsigned long timeout_cs);
-#else
 int dlm_user_request(struct dlm_ls *ls, struct dlm_user_args *ua, int mode,
 	uint32_t flags, void *name, unsigned int namelen);
 int dlm_user_convert(struct dlm_ls *ls, struct dlm_user_args *ua_tmp,
 	int mode, uint32_t flags, uint32_t lkid, char *lvb_in);
-#endif
 int dlm_user_adopt_orphan(struct dlm_ls *ls, struct dlm_user_args *ua_tmp,
 	int mode, uint32_t flags, void *name, unsigned int namelen,
 	uint32_t *lkid);
diff --git a/fs/dlm/lockspace.c b/fs/dlm/lockspace.c
index 7325acbd1af7..67261b7b1f0e 100644
--- a/fs/dlm/lockspace.c
+++ b/fs/dlm/lockspace.c
@@ -273,7 +273,6 @@ static int dlm_scand(void *data)
 			if (dlm_lock_recovery_try(ls)) {
 				ls->ls_scan_time = jiffies;
 				dlm_scan_rsbs(ls);
-				dlm_scan_timeout(ls);
 				dlm_unlock_recovery(ls);
 			} else {
 				ls->ls_scan_time += HZ;
@@ -488,28 +487,10 @@ static int new_lockspace(const char *name, const char *cluster,
 		ls->ls_ops_arg = ops_arg;
 	}
 
-#ifdef CONFIG_DLM_DEPRECATED_API
-	if (flags & DLM_LSFL_TIMEWARN) {
-		pr_warn_once("===============================================================\n"
-			     "WARNING: the dlm DLM_LSFL_TIMEWARN flag is being deprecated and\n"
-			     "         will be removed in v6.2!\n"
-			     "         Inclusive DLM_LSFL_TIMEWARN define in UAPI header!\n"
-			     "===============================================================\n");
-
-		set_bit(LSFL_TIMEWARN, &ls->ls_flags);
-	}
-
-	/* ls_exflags are forced to match among nodes, and we don't
-	 * need to require all nodes to have some flags set
-	 */
-	ls->ls_exflags = (flags & ~(DLM_LSFL_TIMEWARN | DLM_LSFL_FS |
-				    DLM_LSFL_NEWEXCL));
-#else
 	/* ls_exflags are forced to match among nodes, and we don't
 	 * need to require all nodes to have some flags set
 	 */
 	ls->ls_exflags = (flags & ~(DLM_LSFL_FS | DLM_LSFL_NEWEXCL));
-#endif
 
 	size = READ_ONCE(dlm_config.ci_rsbtbl_size);
 	ls->ls_rsbtbl_size = size;
@@ -537,10 +518,6 @@ static int new_lockspace(const char *name, const char *cluster,
 	mutex_init(&ls->ls_waiters_mutex);
 	INIT_LIST_HEAD(&ls->ls_orphans);
 	mutex_init(&ls->ls_orphans_mutex);
-#ifdef CONFIG_DLM_DEPRECATED_API
-	INIT_LIST_HEAD(&ls->ls_timeout);
-	mutex_init(&ls->ls_timeout_mutex);
-#endif
 
 	INIT_LIST_HEAD(&ls->ls_new_rsb);
 	spin_lock_init(&ls->ls_new_rsb_spin);
@@ -552,8 +529,8 @@ static int new_lockspace(const char *name, const char *cluster,
 	ls->ls_total_weight = 0;
 	ls->ls_node_array = NULL;
 
-	memset(&ls->ls_stub_rsb, 0, sizeof(struct dlm_rsb));
-	ls->ls_stub_rsb.res_ls = ls;
+	memset(&ls->ls_local_rsb, 0, sizeof(struct dlm_rsb));
+	ls->ls_local_rsb.res_ls = ls;
 
 	ls->ls_debug_rsb_dentry = NULL;
 	ls->ls_debug_waiters_dentry = NULL;
@@ -764,7 +741,7 @@ static int lkb_idr_free(int id, void *p, void *data)
 {
 	struct dlm_lkb *lkb = p;
 
-	if (lkb->lkb_lvbptr && lkb->lkb_flags & DLM_IFL_MSTCPY)
+	if (lkb->lkb_lvbptr && test_bit(DLM_IFL_MSTCPY_BIT, &lkb->lkb_iflags))
 		dlm_free_lvb(lkb->lkb_lvbptr);
 
 	dlm_free_lkb(lkb);
diff --git a/fs/dlm/lowcomms.c b/fs/dlm/lowcomms.c
index a9b14f81d655..d56155063dee 100644
--- a/fs/dlm/lowcomms.c
+++ b/fs/dlm/lowcomms.c
@@ -1717,8 +1717,8 @@ static void work_stop(void)
 
 static int work_start(void)
 {
-	io_workqueue = alloc_workqueue("dlm_io", WQ_HIGHPRI | WQ_MEM_RECLAIM,
-				       0);
+	io_workqueue = alloc_workqueue("dlm_io", WQ_HIGHPRI | WQ_MEM_RECLAIM |
+				       WQ_UNBOUND, 0);
 	if (!io_workqueue) {
 		log_print("can't start dlm_io");
 		return -ENOMEM;
@@ -1814,7 +1814,7 @@ static int dlm_listen_for_all(void)
 	sock->sk->sk_data_ready = lowcomms_listen_data_ready;
 	release_sock(sock->sk);
 
-	result = sock->ops->listen(sock, 5);
+	result = sock->ops->listen(sock, 128);
 	if (result < 0) {
 		dlm_close_sock(&listen_con.sock);
 		return result;
diff --git a/fs/dlm/main.c b/fs/dlm/main.c
index a77338be3237..93755f83a30d 100644
--- a/fs/dlm/main.c
+++ b/fs/dlm/main.c
@@ -46,20 +46,14 @@ static int __init init_dlm(void)
 	if (error)
 		goto out_debug;
 
-	error = dlm_netlink_init();
-	if (error)
-		goto out_user;
-
 	error = dlm_plock_init();
 	if (error)
-		goto out_netlink;
+		goto out_user;
 
 	printk("DLM installed\n");
 
 	return 0;
 
- out_netlink:
-	dlm_netlink_exit();
  out_user:
 	dlm_user_exit();
  out_debug:
@@ -77,7 +71,6 @@ static int __init init_dlm(void)
 static void __exit exit_dlm(void)
 {
 	dlm_plock_exit();
-	dlm_netlink_exit();
 	dlm_user_exit();
 	dlm_config_exit();
 	dlm_memory_exit();
diff --git a/fs/dlm/memory.c b/fs/dlm/memory.c
index cdbaa452fc05..64f212a066cf 100644
--- a/fs/dlm/memory.c
+++ b/fs/dlm/memory.c
@@ -118,7 +118,7 @@ struct dlm_lkb *dlm_allocate_lkb(struct dlm_ls *ls)
 
 void dlm_free_lkb(struct dlm_lkb *lkb)
 {
-	if (lkb->lkb_flags & DLM_IFL_USER) {
+	if (test_bit(DLM_DFL_USER_BIT, &lkb->lkb_dflags)) {
 		struct dlm_user_args *ua;
 		ua = lkb->lkb_ua;
 		if (ua) {
diff --git a/fs/dlm/netlink.c b/fs/dlm/netlink.c
deleted file mode 100644
index 4de4b8651c6c..000000000000
--- a/fs/dlm/netlink.c
+++ /dev/null
@@ -1,139 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Copyright (C) 2007 Red Hat, Inc.  All rights reserved.
- */
-
-#include <net/genetlink.h>
-#include <linux/dlm.h>
-#include <linux/dlm_netlink.h>
-#include <linux/gfp.h>
-
-#include "dlm_internal.h"
-
-static uint32_t dlm_nl_seqnum;
-static uint32_t listener_nlportid;
-
-static struct genl_family family;
-
-static int prepare_data(u8 cmd, struct sk_buff **skbp, size_t size)
-{
-	struct sk_buff *skb;
-	void *data;
-
-	skb = genlmsg_new(size, GFP_NOFS);
-	if (!skb)
-		return -ENOMEM;
-
-	/* add the message headers */
-	data = genlmsg_put(skb, 0, dlm_nl_seqnum++, &family, 0, cmd);
-	if (!data) {
-		nlmsg_free(skb);
-		return -EINVAL;
-	}
-
-	*skbp = skb;
-	return 0;
-}
-
-static struct dlm_lock_data *mk_data(struct sk_buff *skb)
-{
-	struct nlattr *ret;
-
-	ret = nla_reserve(skb, DLM_TYPE_LOCK, sizeof(struct dlm_lock_data));
-	if (!ret)
-		return NULL;
-	return nla_data(ret);
-}
-
-static int send_data(struct sk_buff *skb)
-{
-	struct genlmsghdr *genlhdr = nlmsg_data((struct nlmsghdr *)skb->data);
-	void *data = genlmsg_data(genlhdr);
-
-	genlmsg_end(skb, data);
-
-	return genlmsg_unicast(&init_net, skb, listener_nlportid);
-}
-
-static int user_cmd(struct sk_buff *skb, struct genl_info *info)
-{
-	listener_nlportid = info->snd_portid;
-	printk("user_cmd nlpid %u\n", listener_nlportid);
-	return 0;
-}
-
-static const struct genl_small_ops dlm_nl_ops[] = {
-	{
-		.cmd	= DLM_CMD_HELLO,
-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
-		.doit	= user_cmd,
-	},
-};
-
-static struct genl_family family __ro_after_init = {
-	.name		= DLM_GENL_NAME,
-	.version	= DLM_GENL_VERSION,
-	.small_ops	= dlm_nl_ops,
-	.n_small_ops	= ARRAY_SIZE(dlm_nl_ops),
-	.resv_start_op	= DLM_CMD_HELLO + 1,
-	.module		= THIS_MODULE,
-};
-
-int __init dlm_netlink_init(void)
-{
-	return genl_register_family(&family);
-}
-
-void dlm_netlink_exit(void)
-{
-	genl_unregister_family(&family);
-}
-
-static void fill_data(struct dlm_lock_data *data, struct dlm_lkb *lkb)
-{
-	struct dlm_rsb *r = lkb->lkb_resource;
-
-	memset(data, 0, sizeof(struct dlm_lock_data));
-
-	data->version = DLM_LOCK_DATA_VERSION;
-	data->nodeid = lkb->lkb_nodeid;
-	data->ownpid = lkb->lkb_ownpid;
-	data->id = lkb->lkb_id;
-	data->remid = lkb->lkb_remid;
-	data->status = lkb->lkb_status;
-	data->grmode = lkb->lkb_grmode;
-	data->rqmode = lkb->lkb_rqmode;
-	if (lkb->lkb_ua)
-		data->xid = lkb->lkb_ua->xid;
-	if (r) {
-		data->lockspace_id = r->res_ls->ls_global_id;
-		data->resource_namelen = r->res_length;
-		memcpy(data->resource_name, r->res_name, r->res_length);
-	}
-}
-
-void dlm_timeout_warn(struct dlm_lkb *lkb)
-{
-	struct sk_buff *send_skb;
-	struct dlm_lock_data *data;
-	size_t size;
-	int rv;
-
-	size = nla_total_size(sizeof(struct dlm_lock_data)) +
-	       nla_total_size(0); /* why this? */
-
-	rv = prepare_data(DLM_CMD_TIMEOUT, &send_skb, size);
-	if (rv < 0)
-		return;
-
-	data = mk_data(send_skb);
-	if (!data) {
-		nlmsg_free(send_skb);
-		return;
-	}
-
-	fill_data(data, lkb);
-
-	send_data(send_skb);
-}
-
diff --git a/fs/dlm/rcom.c b/fs/dlm/rcom.c
index b76d52e2f6bd..f4afdf892f78 100644
--- a/fs/dlm/rcom.c
+++ b/fs/dlm/rcom.c
@@ -415,7 +415,7 @@ static void pack_rcom_lock(struct dlm_rsb *r, struct dlm_lkb *lkb,
 	rl->rl_ownpid = cpu_to_le32(lkb->lkb_ownpid);
 	rl->rl_lkid = cpu_to_le32(lkb->lkb_id);
 	rl->rl_exflags = cpu_to_le32(lkb->lkb_exflags);
-	rl->rl_flags = cpu_to_le32(lkb->lkb_flags);
+	rl->rl_flags = cpu_to_le32(dlm_dflags_val(lkb));
 	rl->rl_lvbseq = cpu_to_le32(lkb->lkb_lvbseq);
 	rl->rl_rqmode = lkb->lkb_rqmode;
 	rl->rl_grmode = lkb->lkb_grmode;
diff --git a/fs/dlm/recover.c b/fs/dlm/recover.c
index ccff1791803f..29d71a5018d4 100644
--- a/fs/dlm/recover.c
+++ b/fs/dlm/recover.c
@@ -403,7 +403,7 @@ static void set_lock_master(struct list_head *queue, int nodeid)
 	struct dlm_lkb *lkb;
 
 	list_for_each_entry(lkb, queue, lkb_statequeue) {
-		if (!(lkb->lkb_flags & DLM_IFL_MSTCPY)) {
+		if (!test_bit(DLM_IFL_MSTCPY_BIT, &lkb->lkb_iflags)) {
 			lkb->lkb_nodeid = nodeid;
 			lkb->lkb_remid = 0;
 		}
diff --git a/fs/dlm/recoverd.c b/fs/dlm/recoverd.c
index e15eb511b04b..19da816cfb09 100644
--- a/fs/dlm/recoverd.c
+++ b/fs/dlm/recoverd.c
@@ -214,8 +214,6 @@ static int ls_recover(struct dlm_ls *ls, struct dlm_recover *rv)
 
 	dlm_clear_members_gone(ls);
 
-	dlm_adjust_timeouts(ls);
-
 	dlm_callback_resume(ls);
 
 	error = enable_locking(ls, rv->seq);
diff --git a/fs/dlm/user.c b/fs/dlm/user.c
index 35129505ddda..d9c09fc0aba1 100644
--- a/fs/dlm/user.c
+++ b/fs/dlm/user.c
@@ -183,7 +183,8 @@ void dlm_user_add_ast(struct dlm_lkb *lkb, uint32_t flags, int mode,
 	struct dlm_user_proc *proc;
 	int rv;
 
-	if (lkb->lkb_flags & (DLM_IFL_ORPHAN | DLM_IFL_DEAD))
+	if (test_bit(DLM_DFL_ORPHAN_BIT, &lkb->lkb_dflags) ||
+	    test_bit(DLM_IFL_DEAD_BIT, &lkb->lkb_iflags))
 		return;
 
 	ls = lkb->lkb_resource->res_ls;
@@ -195,7 +196,8 @@ void dlm_user_add_ast(struct dlm_lkb *lkb, uint32_t flags, int mode,
 	   for cases where a completion ast is received for an operation that
 	   began before clear_proc_locks did its cancel/unlock. */
 
-	if (lkb->lkb_flags & (DLM_IFL_ORPHAN | DLM_IFL_DEAD))
+	if (test_bit(DLM_DFL_ORPHAN_BIT, &lkb->lkb_dflags) ||
+	    test_bit(DLM_IFL_DEAD_BIT, &lkb->lkb_iflags))
 		goto out;
 
 	DLM_ASSERT(lkb->lkb_ua, dlm_print_lkb(lkb););
@@ -206,7 +208,7 @@ void dlm_user_add_ast(struct dlm_lkb *lkb, uint32_t flags, int mode,
 		goto out;
 
 	if ((flags & DLM_CB_CAST) && lkb_is_endoflife(mode, status))
-		lkb->lkb_flags |= DLM_IFL_ENDOFLIFE;
+		set_bit(DLM_IFL_ENDOFLIFE_BIT, &lkb->lkb_iflags);
 
 	spin_lock(&proc->asts_spin);
 
@@ -229,7 +231,7 @@ void dlm_user_add_ast(struct dlm_lkb *lkb, uint32_t flags, int mode,
 	}
 	spin_unlock(&proc->asts_spin);
 
-	if (lkb->lkb_flags & DLM_IFL_ENDOFLIFE) {
+	if (test_bit(DLM_IFL_ENDOFLIFE_BIT, &lkb->lkb_iflags)) {
 		/* N.B. spin_lock locks_spin, not asts_spin */
 		spin_lock(&proc->locks_spin);
 		if (!list_empty(&lkb->lkb_ownqueue)) {
@@ -259,14 +261,6 @@ static int device_user_lock(struct dlm_user_proc *proc,
 		goto out;
 	}
 
-#ifdef CONFIG_DLM_DEPRECATED_API
-	if (params->timeout)
-		pr_warn_once("========================================================\n"
-			     "WARNING: the lkb timeout feature is being deprecated and\n"
-			     "         will be removed in v6.2!\n"
-			     "========================================================\n");
-#endif
-
 	ua = kzalloc(sizeof(struct dlm_user_args), GFP_NOFS);
 	if (!ua)
 		goto out;
@@ -279,16 +273,9 @@ static int device_user_lock(struct dlm_user_proc *proc,
 	ua->xid = params->xid;
 
 	if (params->flags & DLM_LKF_CONVERT) {
-#ifdef CONFIG_DLM_DEPRECATED_API
-		error = dlm_user_convert(ls, ua,
-				         params->mode, params->flags,
-				         params->lkid, params->lvb,
-					 (unsigned long) params->timeout);
-#else
 		error = dlm_user_convert(ls, ua,
 					 params->mode, params->flags,
 					 params->lkid, params->lvb);
-#endif
 	} else if (params->flags & DLM_LKF_ORPHAN) {
 		error = dlm_user_adopt_orphan(ls, ua,
 					 params->mode, params->flags,
@@ -297,16 +284,9 @@ static int device_user_lock(struct dlm_user_proc *proc,
 		if (!error)
 			error = lkid;
 	} else {
-#ifdef CONFIG_DLM_DEPRECATED_API
-		error = dlm_user_request(ls, ua,
-					 params->mode, params->flags,
-					 params->name, params->namelen,
-					 (unsigned long) params->timeout);
-#else
 		error = dlm_user_request(ls, ua,
 					 params->mode, params->flags,
 					 params->name, params->namelen);
-#endif
 		if (!error)
 			error = ua->lksb.sb_lkid;
 	}
@@ -884,7 +864,7 @@ static ssize_t device_read(struct file *file, char __user *buf, size_t count,
 		goto try_another;
 	case DLM_DEQUEUE_CALLBACK_LAST:
 		list_del_init(&lkb->lkb_cb_list);
-		lkb->lkb_flags &= ~DLM_IFL_CB_PENDING;
+		clear_bit(DLM_IFL_CB_PENDING_BIT, &lkb->lkb_iflags);
 		break;
 	case DLM_DEQUEUE_CALLBACK_SUCCESS:
 		break;
diff --git a/include/linux/dlm.h b/include/linux/dlm.h
index c6bc2b5ee7e6..c58c4f790c04 100644
--- a/include/linux/dlm.h
+++ b/include/linux/dlm.h
@@ -53,9 +53,6 @@ struct dlm_lockspace_ops {
  *   The dlm should not use a resource directory, but statically assign
  *   resource mastery to nodes based on the name hash that is otherwise
  *   used to select the directory node.  Must be the same on all nodes.
- * DLM_LSFL_TIMEWARN
- *   The dlm should emit netlink messages if locks have been waiting
- *   for a configurable amount of time.  (Unused.)
  * DLM_LSFL_NEWEXCL
  *   dlm_new_lockspace() should return -EEXIST if the lockspace exists.
  *
diff --git a/include/trace/events/dlm.h b/include/trace/events/dlm.h
index 37eb79e29b28..2b09574e1243 100644
--- a/include/trace/events/dlm.h
+++ b/include/trace/events/dlm.h
@@ -47,16 +47,8 @@
 	{ DLM_SBF_ALTMODE,	"ALTMODE" })
 
 #define show_lkb_flags(flags) __print_flags(flags, "|",		\
-	{ DLM_IFL_MSTCPY,	"MSTCPY" },			\
-	{ DLM_IFL_RESEND,	"RESEND" },			\
-	{ DLM_IFL_DEAD,		"DEAD" },			\
-	{ DLM_IFL_OVERLAP_UNLOCK, "OVERLAP_UNLOCK" },		\
-	{ DLM_IFL_OVERLAP_CANCEL, "OVERLAP_CANCEL" },		\
-	{ DLM_IFL_ENDOFLIFE,	"ENDOFLIFE" },			\
-	{ DLM_IFL_DEADLOCK_CANCEL, "DEADLOCK_CANCEL" },		\
-	{ DLM_IFL_STUB_MS,	"STUB_MS" },			\
-	{ DLM_IFL_USER,		"USER" },			\
-	{ DLM_IFL_ORPHAN,	"ORPHAN" })
+	{ BIT(DLM_DFL_USER_BIT), "USER" },			\
+	{ BIT(DLM_DFL_ORPHAN_BIT), "ORPHAN" })
 
 #define show_header_cmd(cmd) __print_symbolic(cmd,		\
 	{ DLM_MSG,		"MSG"},				\
diff --git a/include/uapi/linux/dlm.h b/include/uapi/linux/dlm.h
index 1923f4f3b05e..e7e905fb0bb2 100644
--- a/include/uapi/linux/dlm.h
+++ b/include/uapi/linux/dlm.h
@@ -68,6 +68,7 @@ struct dlm_lksb {
 
 /* dlm_new_lockspace() flags */
 
+/* DLM_LSFL_TIMEWARN is deprecated and reserved. DO NOT USE! */
 #define DLM_LSFL_TIMEWARN	0x00000002
 #define DLM_LSFL_NEWEXCL     	0x00000008
 
diff --git a/include/uapi/linux/dlm_netlink.h b/include/uapi/linux/dlm_netlink.h
deleted file mode 100644
index 5dc3a67d353d..000000000000
--- a/include/uapi/linux/dlm_netlink.h
+++ /dev/null
@@ -1,60 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-/*
- * Copyright (C) 2007 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License v.2.
- */
-
-#ifndef _DLM_NETLINK_H
-#define _DLM_NETLINK_H
-
-#include <linux/types.h>
-#include <linux/dlmconstants.h>
-
-enum {
-	DLM_STATUS_WAITING = 1,
-	DLM_STATUS_GRANTED = 2,
-	DLM_STATUS_CONVERT = 3,
-};
-
-#define DLM_LOCK_DATA_VERSION 1
-
-struct dlm_lock_data {
-	__u16 version;
-	__u32 lockspace_id;
-	int nodeid;
-	int ownpid;
-	__u32 id;
-	__u32 remid;
-	__u64 xid;
-	__s8 status;
-	__s8 grmode;
-	__s8 rqmode;
-	unsigned long timestamp;
-	int resource_namelen;
-	char resource_name[DLM_RESNAME_MAXLEN];
-};
-
-enum {
-	DLM_CMD_UNSPEC = 0,
-	DLM_CMD_HELLO,		/* user->kernel */
-	DLM_CMD_TIMEOUT,	/* kernel->user */
-	__DLM_CMD_MAX,
-};
-
-#define DLM_CMD_MAX (__DLM_CMD_MAX - 1)
-
-enum {
-	DLM_TYPE_UNSPEC = 0,
-	DLM_TYPE_LOCK,
-	__DLM_TYPE_MAX,
-};
-
-#define DLM_TYPE_MAX (__DLM_TYPE_MAX - 1)
-
-#define DLM_GENL_VERSION 0x1
-#define DLM_GENL_NAME "DLM"
-
-#endif /* _DLM_NETLINK_H */
diff --git a/include/uapi/linux/dlmconstants.h b/include/uapi/linux/dlmconstants.h
index a8ae47c32a37..6ca77a6388bc 100644
--- a/include/uapi/linux/dlmconstants.h
+++ b/include/uapi/linux/dlmconstants.h
@@ -87,7 +87,6 @@
  * DLM_LKF_NODLCKWT
  *
  * Do not cancel the lock if it gets into conversion deadlock.
- * Exclude this lock from being monitored due to DLM_LSFL_TIMEWARN.
  *
  * DLM_LKF_NODLCKBLK
  *
@@ -132,6 +131,10 @@
  * Unlock the lock even if it is converting or waiting or has sublocks.
  * Only really for use by the userland device.c code.
  *
+ * DLM_LKF_TIMEOUT
+ *
+ * This value is deprecated and reserved. DO NOT USE!
+ *
  */
 
 #define DLM_LKF_NOQUEUE		0x00000001