Merge tag 'trace-v7.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-tracegrafted

Pull tracing fixes from Steven Rostedt:

 - Don't destroy user event fields when removal fails

   User event fields are destroyed before the event is removed from
   visibility. But that can fail leaving the still visible event with no
   fields. Move the destroying of the fields to after the event is
   successfully removed from visibility.

 - Initialize function graph state is fork before calling
   copy_exec_state()

   For non-CLONE_VM forks, copy_exec_state() allocates a new
   task_exec_state. If that allocation fails, ftrace_graph_exit_task()
   will free the tasks ret_stack pointer. Since that pointer is still
   using the parent's ret_stack, it mistakenly frees the parent's
   pointer too.

   Call ftrace_graph_init() on the task first which will NULL out the
   new tasks's ret_stack and if the copy fails, it will not free
   anything.

 - Remove FGRAPH_MAX_INDEX

   The macro FGRAPH_MAX_INDEX was added but never used. Remove it.

 - Save ent_size in function graph printing of nested functions

   The function graph tracer needs to look at the next event to see if
   the next event is the return of the current function entry. If it is,
   it prints a single line:

	ktime_get();

   Otherwise it prints it like a nested function:

	tick_nohz_irq_exit() {
	    ktime_get();
	    kcpustat_irq_exit();
	}

   In order to look at the next event, it must save the current event so
   that it has the information to print from it. It saves the event in
   the iterator descriptor called "ent". What it doesn't save is the
   ent_size of the event which is now used to know if the function graph
   arguments are to be printed. The peek doesn't save the size so the
   size used happens to be that of the size of the last event that was
   seen.

   Save the entry event size in the iterator descriptor so that the
   correct size is used.

 - Fix several errors with freeing data in the histogram code

   The histogram code had a lot of leaked or or incorrect accounting
   when failures happen. Correct them.

 - Fix histogram regression of .percent and .graph modifiers

   Up until 6.3 histogram values could have "percent" or "graph"
   modifiers that changed how they were printed. But a change that added
   restricting histograms values from being strings, stack traces and
   other modifiers inadvertently prevented them from using the percent
   and graph modifiers, which were legal use cases for values.

   Put back the percent and graph modifiers.

 - Fix various typos in the comments

 - Set the trace_clock before initializing a histogram with clock
   argument

   The histogram API allows the user to specific which trace clock to
   use via a "clock=" string. The histogram is set up first before the
   clock is checked. If the passed in clock is not valid, it exits
   without fully fixing up the histogram leaving it on the list and a
   use-after-free can trigger.

   Update the clock argument first and if it fails then exit gracefully
   before the histogram trigger is placed on any lists.

 - Restore :mod: trailer after parsing in ftrace_set_clr_event

   The function ftrace_set_clr_event() modifies the parse string and
   needs to put it back to what was passed in. It searches for ":mod:"
   via a strsep() but fails to put back the first ':' in the string.

   Add back the ':' in the passed in string.

 - Take trace_array reference when opening a tracer options file

   The options files are dynamically created and some tracers add their
   own options. When a tracer adds their own list of options, the
   trace_array holding them has an array to hold the list of options for
   each tracer. This array increases in size via a krealloc(), and the
   new entry gets a newly allocated array to hold the options of the new
   tracer being added.

   The element in each entry of the tracer's option array holds a
   pointer back to the trace_array, a pointer to the tracer it is
   associated to, a pointer to the flags of the option.

   The issue is that these arrays are freed when the trace_array is
   freed when its instance it represents is removed from the instances
   directory. There's a race that an open of one of these options files
   can happen when the instance is being removed.

   Add a new helper function to be called by the open function of the
   options file to iterate all existing trace_arrays under a lock and
   find the one that has the given option element in one of it's tracer
   arrays. If found, then update the associated trace_array's reference
   counter to keep it from being freed. If not found, have the open call
   return -ENODEV.

 - Disable interrupts when acquiring the lock in rb_wake_up_waiters()

   The function rb_wake_up_waiters() assumes it will be called in
   interrupt context and does not disable irqs when taking
   cpu_buffer->reader_lock, which can be called in hard interrupt
   context. The issue is in PREEMPT_RT, this function is called in
   thread context leaving this lock open to a deadlock.

   Take the lock with interrupts disabled.

 - Use rcu_assign_pointer() for tmp_ops filter hash

   The tmp_ops used in update_ftrace_direct_mod() assigns its
   filter_hash field directly, but that field is annotated as __rcu and
   sparse complains. Assign it with rcu_assign_pointer()

 - Fix use-after-free in enable_trigger_private_data_free()

   The trace_event_call is accessed through the event_trigger_data's
   trace_event_file pointer to put the trace_event_call on freeing. The
   issue is that the trace_event_file data may have been freed already
   causing a use-after-free. Add a field to the event_trigger_data that
   points directly to the trace_event_call so that it can decrement its
   reference directly without needing to go through the
   trace_event_file.

 - Fix accounting of buffer data remote headers

   trace_buffer_desc_size() and trace_remote_alloc_buffer() undercount
   the number of pages is needed for the asked for size as it doesn't
   take into account the meta data on each page. Add a helper function
   to do the calculation properly and use that in these functions.

 - Catch nr_page_va overflow in ring_buffer_desc sizing

   The number of pages per remote ring buffer is capped by
   ring_buffer_desc::nr_page_va (32 bits). A buffer_size large enough to
   overflow that field would silently allocate a descriptor smaller than
   what was asked for.

 - Do not resize the subbuf order if any per_cpu buffer is disabled

   The mmapping of ring buffers disables resizing the subbuffers, but it
   is done per-cpu whereas the subbuf size change is done for all the
   per_cpu buffers under the buffer->mutex. It could change the size of
   some while the mapping is happening on others. Have the resize of the
   subbuf order check all the per_cpu buffers under the lock to see if
   any of them is disabled before starting and causing an inconsistency
   between buffers that are being mapped.

* tag 'trace-v7.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace: (25 commits)
  ring-buffer: Check resize_disabled before publishing the new subbuf order
  tracing/remotes: Catch nr_page_va overflow in ring_buffer_desc sizing
  tracing/remotes: Account for ring buffer page header in size calculation
  tracing: Don't dereference trace_event_file in deferred trigger free
  ftrace: Use rcu_assign_pointer() for tmp_ops filter hash
  ring-buffer: Acquire the lock with irqsave in rb_wake_up_waiters()
  tracing: Take trace_array reference when opening a tracer options file
  tracing: Fix ring_buffer_read_page_size() kernel-doc
  tracing: Restore :mod: trailer after parsing in ftrace_set_clr_event()
  tracing: Fix memory corruption from a "STACKTRACE" histogram key
  tracing: Fix memory corruption from the histogram stacktrace modifier
  tracing: Undo the registration when enabling the histogram trigger fails
  tracing: Take the reference before publishing the named histogram trigger
  tracing: Set the trace clock before registering the histogram trigger
  tracing: Fix typo "preceeded" in comment
  tracing: Fix typo "availabe" in comment
  tracing: Let histogram values keep the percent and graph modifiers
  tracing: Keep the entry count when the histogram stats allocation fails
  tracing: Free histogram the field rejected for a bad modifier
  tracing: Free histogram the var ref when its initialization fails
  ...

1 files changed, 520 insertions, 0 deletions

diff --git a/fs/resctrl/internal.h b/fs/resctrl/internal.h
new file mode 100644
index 000000000..e62a277de
--- /dev/null
+++ b/fs/resctrl/internal.h
@@ -0,0 +1,520 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _FS_RESCTRL_INTERNAL_H
+#define _FS_RESCTRL_INTERNAL_H
+
+#include <linux/resctrl.h>
+#include <linux/kernfs.h>
+#include <linux/fs_context.h>
+#include <linux/tick.h>
+
+#define CQM_LIMBOCHECK_INTERVAL	1000
+
+/**
+ * cpumask_any_housekeeping() - Choose any CPU in @mask, preferring those that
+ *			        aren't marked nohz_full
+ * @mask:	The mask to pick a CPU from.
+ * @exclude_cpu:The CPU to avoid picking.
+ *
+ * Returns a CPU from @mask, but not @exclude_cpu. If there are housekeeping
+ * CPUs that don't use nohz_full, these are preferred. Pass
+ * RESCTRL_PICK_ANY_CPU to avoid excluding any CPUs.
+ *
+ * When a CPU is excluded, returns >= nr_cpu_ids if no CPUs are available.
+ */
+static inline unsigned int
+cpumask_any_housekeeping(const struct cpumask *mask, int exclude_cpu)
+{
+	unsigned int cpu;
+
+	/* Try to find a CPU that isn't nohz_full to use in preference */
+	if (tick_nohz_full_enabled()) {
+		cpu = cpumask_any_andnot_but(mask, tick_nohz_full_mask, exclude_cpu);
+		if (cpu < nr_cpu_ids)
+			return cpu;
+	}
+
+	return cpumask_any_but(mask, exclude_cpu);
+}
+
+struct rdt_fs_context {
+	struct kernfs_fs_context	kfc;
+	bool				enable_cdpl2;
+	bool				enable_cdpl3;
+	bool				enable_mba_mbps;
+	bool				enable_debug;
+};
+
+static inline struct rdt_fs_context *rdt_fc2context(struct fs_context *fc)
+{
+	struct kernfs_fs_context *kfc = fc->fs_private;
+
+	return container_of(kfc, struct rdt_fs_context, kfc);
+}
+
+/**
+ * struct mon_evt - Properties of a monitor event
+ * @evtid:		event id
+ * @rid:		resource id for this event
+ * @name:		name of the event
+ * @evt_cfg:		Event configuration value that represents the
+ *			memory transactions (e.g., READS_TO_LOCAL_MEM,
+ *			READS_TO_REMOTE_MEM) being tracked by @evtid.
+ *			Only valid if @evtid is an MBM event.
+ * @configurable:	true if the event is configurable
+ * @any_cpu:		true if the event can be read from any CPU
+ * @is_floating_point:	event values are displayed in floating point format
+ * @binary_bits:	number of fixed-point binary bits from architecture,
+ *			only valid if @is_floating_point is true
+ * @enabled:		true if the event is enabled
+ * @arch_priv:		Architecture private data for this event.
+ *			The @arch_priv provided by the architecture via
+ *			resctrl_enable_mon_event().
+ */
+struct mon_evt {
+	enum resctrl_event_id	evtid;
+	enum resctrl_res_level	rid;
+	char			*name;
+	u32			evt_cfg;
+	bool			configurable;
+	bool			any_cpu;
+	bool			is_floating_point;
+	unsigned int		binary_bits;
+	bool			enabled;
+	void			*arch_priv;
+};
+
+extern struct mon_evt mon_event_all[QOS_NUM_EVENTS];
+
+#define for_each_mon_event(mevt) for (mevt = &mon_event_all[QOS_FIRST_EVENT];	\
+				      mevt < &mon_event_all[QOS_NUM_EVENTS]; mevt++)
+
+/* Limit for mon_evt::binary_bits */
+#define MAX_BINARY_BITS	27
+
+/**
+ * struct mon_data - Monitoring details for each event file.
+ * @list:            Member of the global @mon_data_kn_priv_list list.
+ * @rid:             Resource id associated with the event file.
+ * @evt:             Event structure associated with the event file.
+ * @sum:             Set for RDT_RESOURCE_L3 when event must be summed
+ *                   across multiple domains.
+ * @domid:           When @sum is zero this is the domain to which
+ *                   the event file belongs. When @sum is one this
+ *                   is the id of the L3 cache that all domains to be
+ *                   summed share.
+ *
+ * Pointed to by the kernfs kn->priv field of monitoring event files.
+ * Readers and writers must hold rdtgroup_mutex.
+ */
+struct mon_data {
+	struct list_head	list;
+	enum resctrl_res_level	rid;
+	struct mon_evt		*evt;
+	int			domid;
+	bool			sum;
+};
+
+/**
+ * struct rmid_read - Data passed across smp_call*() to read event count.
+ * @rgrp:  Resource group for which the counter is being read. If it is a parent
+ *	   resource group then its event count is summed with the count from all
+ *	   its child resource groups.
+ * @r:	   Resource describing the properties of the event being read.
+ * @hdr:   Header of domain that the counter should be read from. If NULL then
+ *	   sum all domains in @r sharing L3 @ci.id
+ * @evt:   Which monitor event to read.
+ * @first: Initialize MBM counter when true.
+ * @ci:    Cacheinfo for L3. Only set when @hdr is NULL. Used when summing
+ *	   domains.
+ * @is_mbm_cntr: true if "mbm_event" counter assignment mode is enabled and it
+ *	   is an MBM event.
+ * @err:   Error encountered when reading counter.
+ * @val:   Returned value of event counter. If @rgrp is a parent resource
+ *	   group, @val includes the sum of event counts from its child
+ *	   resource groups.  If @hdr is NULL, @val includes the sum of all
+ *	   domains in @r sharing @ci.id, (summed across child resource groups
+ *	   if @rgrp is a parent resource group).
+ * @arch_mon_ctx: Hardware monitor allocated for this read request (MPAM only).
+ */
+struct rmid_read {
+	struct rdtgroup		*rgrp;
+	struct rdt_resource	*r;
+	struct rdt_domain_hdr	*hdr;
+	struct mon_evt		*evt;
+	bool			first;
+	struct cacheinfo	*ci;
+	bool			is_mbm_cntr;
+	int			err;
+	u64			val;
+	void			*arch_mon_ctx;
+};
+
+extern struct list_head resctrl_schema_all;
+
+extern bool resctrl_mounted;
+
+enum rdt_group_type {
+	RDTCTRL_GROUP = 0,
+	RDTMON_GROUP,
+	RDT_NUM_GROUP,
+};
+
+/**
+ * enum rdtgrp_mode - Mode of a RDT resource group
+ * @RDT_MODE_SHAREABLE: This resource group allows sharing of its allocations
+ * @RDT_MODE_EXCLUSIVE: No sharing of this resource group's allocations allowed
+ * @RDT_MODE_PSEUDO_LOCKSETUP: Resource group will be used for Pseudo-Locking
+ * @RDT_MODE_PSEUDO_LOCKED: No sharing of this resource group's allocations
+ *                          allowed AND the allocations are Cache Pseudo-Locked
+ * @RDT_NUM_MODES: Total number of modes
+ *
+ * The mode of a resource group enables control over the allowed overlap
+ * between allocations associated with different resource groups (classes
+ * of service). User is able to modify the mode of a resource group by
+ * writing to the "mode" resctrl file associated with the resource group.
+ *
+ * The "shareable", "exclusive", and "pseudo-locksetup" modes are set by
+ * writing the appropriate text to the "mode" file. A resource group enters
+ * "pseudo-locked" mode after the schemata is written while the resource
+ * group is in "pseudo-locksetup" mode.
+ */
+enum rdtgrp_mode {
+	RDT_MODE_SHAREABLE = 0,
+	RDT_MODE_EXCLUSIVE,
+	RDT_MODE_PSEUDO_LOCKSETUP,
+	RDT_MODE_PSEUDO_LOCKED,
+
+	/* Must be last */
+	RDT_NUM_MODES,
+};
+
+/**
+ * struct mongroup - store mon group's data in resctrl fs.
+ * @mon_data_kn:		kernfs node for the mon_data directory
+ * @parent:			parent rdtgrp
+ * @crdtgrp_list:		child rdtgroup node list
+ * @rmid:			rmid for this rdtgroup
+ */
+struct mongroup {
+	struct kernfs_node	*mon_data_kn;
+	struct rdtgroup		*parent;
+	struct list_head	crdtgrp_list;
+	u32			rmid;
+};
+
+/**
+ * struct rdtgroup - store rdtgroup's data in resctrl file system.
+ * @kn:				kernfs node
+ * @rdtgroup_list:		linked list for all rdtgroups
+ * @closid:			closid for this rdtgroup
+ * @cpu_mask:			CPUs assigned to this rdtgroup
+ * @flags:			status bits
+ * @waitcount:			how many cpus expect to find this
+ *				group when they acquire rdtgroup_mutex
+ * @type:			indicates type of this rdtgroup - either
+ *				monitor only or ctrl_mon group
+ * @mon:			mongroup related data
+ * @mode:			mode of resource group
+ * @mba_mbps_event:		input monitoring event id when mba_sc is enabled
+ * @plr:			pseudo-locked region
+ */
+struct rdtgroup {
+	struct kernfs_node		*kn;
+	struct list_head		rdtgroup_list;
+	u32				closid;
+	struct cpumask			cpu_mask;
+	int				flags;
+	atomic_t			waitcount;
+	enum rdt_group_type		type;
+	struct mongroup			mon;
+	enum rdtgrp_mode		mode;
+	enum resctrl_event_id		mba_mbps_event;
+	struct pseudo_lock_region	*plr;
+};
+
+/* rdtgroup.flags */
+#define	RDT_DELETED		1
+
+/* rftype.flags */
+#define RFTYPE_FLAGS_CPUS_LIST	1
+
+/*
+ * Define the file type flags for base and info directories.
+ */
+#define RFTYPE_INFO			BIT(0)
+
+#define RFTYPE_BASE			BIT(1)
+
+#define RFTYPE_CTRL			BIT(4)
+
+#define RFTYPE_MON			BIT(5)
+
+#define RFTYPE_TOP			BIT(6)
+
+#define RFTYPE_RES_CACHE		BIT(8)
+
+#define RFTYPE_RES_MB			BIT(9)
+
+#define RFTYPE_DEBUG			BIT(10)
+
+#define RFTYPE_ASSIGN_CONFIG		BIT(11)
+
+#define RFTYPE_RES_PERF_PKG		BIT(12)
+
+#define RFTYPE_CTRL_INFO		(RFTYPE_INFO | RFTYPE_CTRL)
+
+#define RFTYPE_MON_INFO			(RFTYPE_INFO | RFTYPE_MON)
+
+#define RFTYPE_TOP_INFO			(RFTYPE_INFO | RFTYPE_TOP)
+
+#define RFTYPE_CTRL_BASE		(RFTYPE_BASE | RFTYPE_CTRL)
+
+#define RFTYPE_MON_BASE			(RFTYPE_BASE | RFTYPE_MON)
+
+/* List of all resource groups */
+extern struct list_head rdt_all_groups;
+
+extern int max_name_width;
+
+/**
+ * struct rftype - describe each file in the resctrl file system
+ * @name:	File name
+ * @mode:	Access mode
+ * @kf_ops:	File operations
+ * @flags:	File specific RFTYPE_FLAGS_* flags
+ * @fflags:	File specific RFTYPE_* flags
+ * @seq_show:	Show content of the file
+ * @write:	Write to the file
+ */
+struct rftype {
+	char			*name;
+	umode_t			mode;
+	const struct kernfs_ops	*kf_ops;
+	unsigned long		flags;
+	unsigned long		fflags;
+
+	int (*seq_show)(struct kernfs_open_file *of,
+			struct seq_file *sf, void *v);
+	/*
+	 * write() is the generic write callback which maps directly to
+	 * kernfs write operation and overrides all other operations.
+	 * Maximum write size is determined by ->max_write_len.
+	 */
+	ssize_t (*write)(struct kernfs_open_file *of,
+			 char *buf, size_t nbytes, loff_t off);
+};
+
+/**
+ * struct mbm_state - status for each MBM counter in each domain
+ * @prev_bw_bytes: Previous bytes value read for bandwidth calculation
+ * @prev_bw:	The most recent bandwidth in MBps
+ */
+struct mbm_state {
+	u64	prev_bw_bytes;
+	u32	prev_bw;
+};
+
+extern struct mutex rdtgroup_mutex;
+
+static inline const char *rdt_kn_name(const struct kernfs_node *kn)
+{
+	return rcu_dereference_check(kn->name, lockdep_is_held(&rdtgroup_mutex));
+}
+
+extern struct rdtgroup rdtgroup_default;
+
+extern struct dentry *debugfs_resctrl;
+
+extern enum resctrl_event_id mba_mbps_default_event;
+
+void rdt_last_cmd_clear(void);
+
+void rdt_last_cmd_puts(const char *s);
+
+__printf(1, 2)
+void rdt_last_cmd_printf(const char *fmt, ...);
+
+struct rdtgroup *rdtgroup_kn_lock_live(struct kernfs_node *kn);
+void rdtgroup_kn_unlock(struct kernfs_node *kn);
+bool info_kn_lock(struct kernfs_node *kn);
+void info_kn_unlock(struct kernfs_node *kn);
+
+int rdtgroup_kn_mode_restrict(struct rdtgroup *r, const char *name);
+
+int rdtgroup_kn_mode_restore(struct rdtgroup *r, const char *name,
+			     umode_t mask);
+
+ssize_t rdtgroup_schemata_write(struct kernfs_open_file *of,
+				char *buf, size_t nbytes, loff_t off);
+
+int rdtgroup_schemata_show(struct kernfs_open_file *of,
+			   struct seq_file *s, void *v);
+
+ssize_t rdtgroup_mba_mbps_event_write(struct kernfs_open_file *of,
+				      char *buf, size_t nbytes, loff_t off);
+
+int rdtgroup_mba_mbps_event_show(struct kernfs_open_file *of,
+				 struct seq_file *s, void *v);
+
+bool rdtgroup_cbm_overlaps(struct resctrl_schema *s, struct rdt_ctrl_domain *d,
+			   unsigned long cbm, int closid, bool exclusive);
+
+unsigned int rdtgroup_cbm_to_size(struct rdt_resource *r, struct rdt_ctrl_domain *d,
+				  unsigned long cbm);
+
+enum rdtgrp_mode rdtgroup_mode_by_closid(int closid);
+
+int rdtgroup_tasks_assigned(struct rdtgroup *r);
+
+int closids_supported(void);
+
+void closid_free(int closid);
+
+int setup_rmid_lru_list(void);
+
+void free_rmid_lru_list(void);
+
+int alloc_rmid(u32 closid);
+
+void free_rmid(u32 closid, u32 rmid);
+
+int resctrl_l3_mon_resource_init(void);
+
+void resctrl_l3_mon_resource_exit(void);
+
+void mon_event_count(void *info);
+
+int rdtgroup_mondata_show(struct seq_file *m, void *arg);
+
+void mon_event_read(struct rmid_read *rr, struct rdt_resource *r,
+		    struct rdt_domain_hdr *hdr, struct rdtgroup *rdtgrp,
+		    cpumask_t *cpumask, struct mon_evt *evt, int first);
+
+void mbm_setup_overflow_handler(struct rdt_l3_mon_domain *dom,
+				unsigned long delay_ms,
+				int exclude_cpu);
+
+void mbm_handle_overflow(struct work_struct *work);
+
+bool is_mba_sc(struct rdt_resource *r);
+
+void cqm_setup_limbo_handler(struct rdt_l3_mon_domain *dom, unsigned long delay_ms,
+			     int exclude_cpu);
+
+void cqm_handle_limbo(struct work_struct *work);
+
+bool has_busy_rmid(struct rdt_l3_mon_domain *d);
+
+void __check_limbo(struct rdt_l3_mon_domain *d, bool force_free);
+
+void resctrl_file_fflags_init(const char *config, unsigned long fflags);
+
+void resctrl_file_mode_init(const char *config, umode_t mode);
+
+void rdt_staged_configs_clear(void);
+
+bool closid_allocated(unsigned int closid);
+
+bool closid_alloc_fixed(u32 closid);
+
+int resctrl_find_cleanest_closid(void);
+
+void *rdt_kn_parent_priv(struct kernfs_node *kn);
+
+int resctrl_mbm_assign_mode_show(struct kernfs_open_file *of, struct seq_file *s, void *v);
+
+ssize_t resctrl_mbm_assign_mode_write(struct kernfs_open_file *of, char *buf,
+				      size_t nbytes, loff_t off);
+
+void resctrl_bmec_files_show(struct rdt_resource *r, struct kernfs_node *l3_mon_kn,
+			     bool show);
+
+int resctrl_num_mbm_cntrs_show(struct kernfs_open_file *of, struct seq_file *s, void *v);
+
+int resctrl_available_mbm_cntrs_show(struct kernfs_open_file *of, struct seq_file *s,
+				     void *v);
+
+void rdtgroup_assign_cntrs(struct rdtgroup *rdtgrp);
+
+void rdtgroup_unassign_cntrs(struct rdtgroup *rdtgrp);
+
+int event_filter_show(struct kernfs_open_file *of, struct seq_file *seq, void *v);
+
+ssize_t event_filter_write(struct kernfs_open_file *of, char *buf, size_t nbytes,
+			   loff_t off);
+
+int resctrl_mbm_assign_on_mkdir_show(struct kernfs_open_file *of,
+				     struct seq_file *s, void *v);
+
+ssize_t resctrl_mbm_assign_on_mkdir_write(struct kernfs_open_file *of, char *buf,
+					  size_t nbytes, loff_t off);
+
+int mbm_L3_assignments_show(struct kernfs_open_file *of, struct seq_file *s, void *v);
+
+ssize_t mbm_L3_assignments_write(struct kernfs_open_file *of, char *buf, size_t nbytes,
+				 loff_t off);
+int resctrl_io_alloc_show(struct kernfs_open_file *of, struct seq_file *seq, void *v);
+
+int rdtgroup_init_cat(struct resctrl_schema *s, u32 closid);
+
+enum resctrl_conf_type resctrl_peer_type(enum resctrl_conf_type my_type);
+
+ssize_t resctrl_io_alloc_write(struct kernfs_open_file *of, char *buf,
+			       size_t nbytes, loff_t off);
+
+const char *rdtgroup_name_by_closid(u32 closid);
+int resctrl_io_alloc_cbm_show(struct kernfs_open_file *of, struct seq_file *seq,
+			      void *v);
+ssize_t resctrl_io_alloc_cbm_write(struct kernfs_open_file *of, char *buf,
+				   size_t nbytes, loff_t off);
+u32 resctrl_io_alloc_closid(struct rdt_resource *r);
+
+#ifdef CONFIG_RESCTRL_FS_PSEUDO_LOCK
+int rdtgroup_locksetup_enter(struct rdtgroup *rdtgrp);
+
+int rdtgroup_locksetup_exit(struct rdtgroup *rdtgrp);
+
+bool rdtgroup_cbm_overlaps_pseudo_locked(struct rdt_ctrl_domain *d, unsigned long cbm);
+
+bool rdtgroup_pseudo_locked_in_hierarchy(struct rdt_ctrl_domain *d);
+
+int rdt_pseudo_lock_init(void);
+
+void rdt_pseudo_lock_release(void);
+
+int rdtgroup_pseudo_lock_create(struct rdtgroup *rdtgrp);
+
+void rdtgroup_pseudo_lock_remove(struct rdtgroup *rdtgrp);
+
+#else
+static inline int rdtgroup_locksetup_enter(struct rdtgroup *rdtgrp)
+{
+	return -EOPNOTSUPP;
+}
+
+static inline int rdtgroup_locksetup_exit(struct rdtgroup *rdtgrp)
+{
+	return -EOPNOTSUPP;
+}
+
+static inline bool rdtgroup_cbm_overlaps_pseudo_locked(struct rdt_ctrl_domain *d, unsigned long cbm)
+{
+	return false;
+}
+
+static inline bool rdtgroup_pseudo_locked_in_hierarchy(struct rdt_ctrl_domain *d)
+{
+	return false;
+}
+
+static inline int rdt_pseudo_lock_init(void) { return 0; }
+static inline void rdt_pseudo_lock_release(void) { }
+static inline int rdtgroup_pseudo_lock_create(struct rdtgroup *rdtgrp)
+{
+	return -EOPNOTSUPP;
+}
+
+static inline void rdtgroup_pseudo_lock_remove(struct rdtgroup *rdtgrp) { }
+#endif /* CONFIG_RESCTRL_FS_PSEUDO_LOCK */
+
+#endif /* _FS_RESCTRL_INTERNAL_H */