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Message-ID: <d53d5bddaf9ac2d9ecbbc2153a2c24c0044096ab.camel@redhat.com>
Date: Mon, 21 Jul 2025 16:13:21 +0200
From: Gabriele Monaco <gmonaco@...hat.com>
To: Nam Cao <namcao@...utronix.de>
Cc: Steven Rostedt <rostedt@...dmis.org>, Masami Hiramatsu
<mhiramat@...nel.org>, Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
linux-trace-kernel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/6] rv: Merge struct rv_monitor_def into struct
rv_monitor
On Mon, 2025-07-21 at 11:47 +0200, Nam Cao wrote:
> Each struct rv_monitor has a unique struct rv_monitor_def associated
> with
> it. struct rv_monitor is statically allocated, while struct
> rv_monitor_def
> is dynamically allocated.
>
> This makes the code more complicated than it should be:
>
> - Lookup is required to get the associated rv_monitor_def from
> rv_monitor
>
> - Dynamic memory allocation is required for rv_monitor_def. This is
> harder to get right compared to static memory. For instance,
> there is an existing mistake: rv_unregister_monitor() does not free
> the memory allocated by rv_register_monitor(). This is fortunately
> not a real memory leak problem, as rv_unregister_monitor() is never
> called.
>
> Simplify and merge rv_monitor_def into rv_monitor.
>
> Signed-off-by: Nam Cao <namcao@...utronix.de>
Right, I don't see a valid reason for keeping it separate, considering
that's also simplifying things.
Reviewed-by: Gabriele Monaco <gmonaco@...hat.com>
Thanks,
Gabriele
> ---
> include/linux/rv.h | 8 ++
> kernel/trace/rv/rv.c | 211 +++++++++++++++-----------------
> --
> kernel/trace/rv/rv.h | 27 ++---
> kernel/trace/rv/rv_reactors.c | 62 +++++-----
> 4 files changed, 140 insertions(+), 168 deletions(-)
>
> diff --git a/include/linux/rv.h b/include/linux/rv.h
> index 97baf58d88b2..dba53aecdfab 100644
> --- a/include/linux/rv.h
> +++ b/include/linux/rv.h
> @@ -7,6 +7,9 @@
> #ifndef _LINUX_RV_H
> #define _LINUX_RV_H
>
> +#include <linux/types.h>
> +#include <linux/list.h>
> +
> #define MAX_DA_NAME_LEN 32
>
> #ifdef CONFIG_RV
> @@ -98,8 +101,13 @@ struct rv_monitor {
> void (*disable)(void);
> void (*reset)(void);
> #ifdef CONFIG_RV_REACTORS
> + struct rv_reactor_def *rdef;
> __printf(1, 2) void (*react)(const char *msg, ...);
> + bool reacting;
> #endif
> + struct list_head list;
> + struct rv_monitor *parent;
> + struct dentry *root_d;
> };
>
> bool rv_monitoring_on(void);
> diff --git a/kernel/trace/rv/rv.c b/kernel/trace/rv/rv.c
> index 108429d16ec1..6c0be2fdc52d 100644
> --- a/kernel/trace/rv/rv.c
> +++ b/kernel/trace/rv/rv.c
> @@ -210,9 +210,9 @@ void rv_put_task_monitor_slot(int slot)
> * Monitors with a parent are nested,
> * Monitors without a parent could be standalone or containers.
> */
> -bool rv_is_nested_monitor(struct rv_monitor_def *mdef)
> +bool rv_is_nested_monitor(struct rv_monitor *mon)
> {
> - return mdef->parent != NULL;
> + return mon->parent != NULL;
> }
>
> /*
> @@ -223,16 +223,16 @@ bool rv_is_nested_monitor(struct rv_monitor_def
> *mdef)
> * for enable()/disable(). Use this condition to find empty
> containers.
> * Keep both conditions in case we have some non-compliant
> containers.
> */
> -bool rv_is_container_monitor(struct rv_monitor_def *mdef)
> +bool rv_is_container_monitor(struct rv_monitor *mon)
> {
> - struct rv_monitor_def *next;
> + struct rv_monitor *next;
>
> - if (list_is_last(&mdef->list, &rv_monitors_list))
> + if (list_is_last(&mon->list, &rv_monitors_list))
> return false;
>
> - next = list_next_entry(mdef, list);
> + next = list_next_entry(mon, list);
>
> - return next->parent == mdef->monitor || !mdef->monitor-
> >enable;
> + return next->parent == mon || !mon->enable;
> }
>
> /*
> @@ -241,10 +241,10 @@ bool rv_is_container_monitor(struct
> rv_monitor_def *mdef)
> static ssize_t monitor_enable_read_data(struct file *filp, char
> __user *user_buf, size_t count,
> loff_t *ppos)
> {
> - struct rv_monitor_def *mdef = filp->private_data;
> + struct rv_monitor *mon = filp->private_data;
> const char *buff;
>
> - buff = mdef->monitor->enabled ? "1\n" : "0\n";
> + buff = mon->enabled ? "1\n" : "0\n";
>
> return simple_read_from_buffer(user_buf, count, ppos, buff,
> strlen(buff)+1);
> }
> @@ -252,14 +252,14 @@ static ssize_t monitor_enable_read_data(struct
> file *filp, char __user *user_buf
> /*
> * __rv_disable_monitor - disabled an enabled monitor
> */
> -static int __rv_disable_monitor(struct rv_monitor_def *mdef, bool
> sync)
> +static int __rv_disable_monitor(struct rv_monitor *mon, bool sync)
> {
> lockdep_assert_held(&rv_interface_lock);
>
> - if (mdef->monitor->enabled) {
> - mdef->monitor->enabled = 0;
> - if (mdef->monitor->disable)
> - mdef->monitor->disable();
> + if (mon->enabled) {
> + mon->enabled = 0;
> + if (mon->disable)
> + mon->disable();
>
> /*
> * Wait for the execution of all events to finish.
> @@ -273,90 +273,90 @@ static int __rv_disable_monitor(struct
> rv_monitor_def *mdef, bool sync)
> return 0;
> }
>
> -static void rv_disable_single(struct rv_monitor_def *mdef)
> +static void rv_disable_single(struct rv_monitor *mon)
> {
> - __rv_disable_monitor(mdef, true);
> + __rv_disable_monitor(mon, true);
> }
>
> -static int rv_enable_single(struct rv_monitor_def *mdef)
> +static int rv_enable_single(struct rv_monitor *mon)
> {
> int retval;
>
> lockdep_assert_held(&rv_interface_lock);
>
> - if (mdef->monitor->enabled)
> + if (mon->enabled)
> return 0;
>
> - retval = mdef->monitor->enable();
> + retval = mon->enable();
>
> if (!retval)
> - mdef->monitor->enabled = 1;
> + mon->enabled = 1;
>
> return retval;
> }
>
> -static void rv_disable_container(struct rv_monitor_def *mdef)
> +static void rv_disable_container(struct rv_monitor *mon)
> {
> - struct rv_monitor_def *p = mdef;
> + struct rv_monitor *p = mon;
> int enabled = 0;
>
> list_for_each_entry_continue(p, &rv_monitors_list, list) {
> - if (p->parent != mdef->monitor)
> + if (p->parent != mon)
> break;
> enabled += __rv_disable_monitor(p, false);
> }
> if (enabled)
> tracepoint_synchronize_unregister();
> - mdef->monitor->enabled = 0;
> + mon->enabled = 0;
> }
>
> -static int rv_enable_container(struct rv_monitor_def *mdef)
> +static int rv_enable_container(struct rv_monitor *mon)
> {
> - struct rv_monitor_def *p = mdef;
> + struct rv_monitor *p = mon;
> int retval = 0;
>
> list_for_each_entry_continue(p, &rv_monitors_list, list) {
> - if (retval || p->parent != mdef->monitor)
> + if (retval || p->parent != mon)
> break;
> retval = rv_enable_single(p);
> }
> if (retval)
> - rv_disable_container(mdef);
> + rv_disable_container(mon);
> else
> - mdef->monitor->enabled = 1;
> + mon->enabled = 1;
> return retval;
> }
>
> /**
> * rv_disable_monitor - disable a given runtime monitor
> - * @mdef: Pointer to the monitor definition structure.
> + * @mon: Pointer to the monitor definition structure.
> *
> * Returns 0 on success.
> */
> -int rv_disable_monitor(struct rv_monitor_def *mdef)
> +int rv_disable_monitor(struct rv_monitor *mon)
> {
> - if (rv_is_container_monitor(mdef))
> - rv_disable_container(mdef);
> + if (rv_is_container_monitor(mon))
> + rv_disable_container(mon);
> else
> - rv_disable_single(mdef);
> + rv_disable_single(mon);
>
> return 0;
> }
>
> /**
> * rv_enable_monitor - enable a given runtime monitor
> - * @mdef: Pointer to the monitor definition structure.
> + * @mon: Pointer to the monitor definition structure.
> *
> * Returns 0 on success, error otherwise.
> */
> -int rv_enable_monitor(struct rv_monitor_def *mdef)
> +int rv_enable_monitor(struct rv_monitor *mon)
> {
> int retval;
>
> - if (rv_is_container_monitor(mdef))
> - retval = rv_enable_container(mdef);
> + if (rv_is_container_monitor(mon))
> + retval = rv_enable_container(mon);
> else
> - retval = rv_enable_single(mdef);
> + retval = rv_enable_single(mon);
>
> return retval;
> }
> @@ -367,7 +367,7 @@ int rv_enable_monitor(struct rv_monitor_def
> *mdef)
> static ssize_t monitor_enable_write_data(struct file *filp, const
> char __user *user_buf,
> size_t count, loff_t *ppos)
> {
> - struct rv_monitor_def *mdef = filp->private_data;
> + struct rv_monitor *mon = filp->private_data;
> int retval;
> bool val;
>
> @@ -378,9 +378,9 @@ static ssize_t monitor_enable_write_data(struct
> file *filp, const char __user *u
> mutex_lock(&rv_interface_lock);
>
> if (val)
> - retval = rv_enable_monitor(mdef);
> + retval = rv_enable_monitor(mon);
> else
> - retval = rv_disable_monitor(mdef);
> + retval = rv_disable_monitor(mon);
>
> mutex_unlock(&rv_interface_lock);
>
> @@ -399,12 +399,12 @@ static const struct file_operations
> interface_enable_fops = {
> static ssize_t monitor_desc_read_data(struct file *filp, char __user
> *user_buf, size_t count,
> loff_t *ppos)
> {
> - struct rv_monitor_def *mdef = filp->private_data;
> + struct rv_monitor *mon = filp->private_data;
> char buff[256];
>
> memset(buff, 0, sizeof(buff));
>
> - snprintf(buff, sizeof(buff), "%s\n", mdef->monitor-
> >description);
> + snprintf(buff, sizeof(buff), "%s\n", mon->description);
>
> return simple_read_from_buffer(user_buf, count, ppos, buff,
> strlen(buff) + 1);
> }
> @@ -419,37 +419,37 @@ static const struct file_operations
> interface_desc_fops = {
> * the monitor dir, where the specific options of the monitor
> * are exposed.
> */
> -static int create_monitor_dir(struct rv_monitor_def *mdef, struct
> rv_monitor_def *parent)
> +static int create_monitor_dir(struct rv_monitor *mon, struct
> rv_monitor *parent)
> {
> struct dentry *root = parent ? parent->root_d :
> get_monitors_root();
> - const char *name = mdef->monitor->name;
> + const char *name = mon->name;
> struct dentry *tmp;
> int retval;
>
> - mdef->root_d = rv_create_dir(name, root);
> - if (!mdef->root_d)
> + mon->root_d = rv_create_dir(name, root);
> + if (!mon->root_d)
> return -ENOMEM;
>
> - tmp = rv_create_file("enable", RV_MODE_WRITE, mdef->root_d,
> mdef, &interface_enable_fops);
> + tmp = rv_create_file("enable", RV_MODE_WRITE, mon->root_d,
> mon, &interface_enable_fops);
> if (!tmp) {
> retval = -ENOMEM;
> goto out_remove_root;
> }
>
> - tmp = rv_create_file("desc", RV_MODE_READ, mdef->root_d,
> mdef, &interface_desc_fops);
> + tmp = rv_create_file("desc", RV_MODE_READ, mon->root_d, mon,
> &interface_desc_fops);
> if (!tmp) {
> retval = -ENOMEM;
> goto out_remove_root;
> }
>
> - retval = reactor_populate_monitor(mdef);
> + retval = reactor_populate_monitor(mon);
> if (retval)
> goto out_remove_root;
>
> return 0;
>
> out_remove_root:
> - rv_remove(mdef->root_d);
> + rv_remove(mon->root_d);
> return retval;
> }
>
> @@ -458,13 +458,12 @@ static int create_monitor_dir(struct
> rv_monitor_def *mdef, struct rv_monitor_def
> */
> static int monitors_show(struct seq_file *m, void *p)
> {
> - struct rv_monitor_def *mon_def = p;
> + struct rv_monitor *mon = p;
>
> - if (mon_def->parent)
> - seq_printf(m, "%s:%s\n", mon_def->parent->name,
> - mon_def->monitor->name);
> + if (mon->parent)
> + seq_printf(m, "%s:%s\n", mon->parent->name, mon-
> >name);
> else
> - seq_printf(m, "%s\n", mon_def->monitor->name);
> + seq_printf(m, "%s\n", mon->name);
> return 0;
> }
>
> @@ -496,13 +495,13 @@ static void *available_monitors_next(struct
> seq_file *m, void *p, loff_t *pos)
> */
> static void *enabled_monitors_next(struct seq_file *m, void *p,
> loff_t *pos)
> {
> - struct rv_monitor_def *m_def = p;
> + struct rv_monitor *mon = p;
>
> (*pos)++;
>
> - list_for_each_entry_continue(m_def, &rv_monitors_list, list)
> {
> - if (m_def->monitor->enabled)
> - return m_def;
> + list_for_each_entry_continue(mon, &rv_monitors_list, list) {
> + if (mon->enabled)
> + return mon;
> }
>
> return NULL;
> @@ -510,7 +509,7 @@ static void *enabled_monitors_next(struct
> seq_file *m, void *p, loff_t *pos)
>
> static void *enabled_monitors_start(struct seq_file *m, loff_t *pos)
> {
> - struct rv_monitor_def *m_def;
> + struct rv_monitor *mon;
> loff_t l;
>
> mutex_lock(&rv_interface_lock);
> @@ -518,15 +517,15 @@ static void *enabled_monitors_start(struct
> seq_file *m, loff_t *pos)
> if (list_empty(&rv_monitors_list))
> return NULL;
>
> - m_def = list_entry(&rv_monitors_list, struct rv_monitor_def,
> list);
> + mon = list_entry(&rv_monitors_list, struct rv_monitor,
> list);
>
> for (l = 0; l <= *pos; ) {
> - m_def = enabled_monitors_next(m, m_def, &l);
> - if (!m_def)
> + mon = enabled_monitors_next(m, mon, &l);
> + if (!mon)
> break;
> }
>
> - return m_def;
> + return mon;
> }
>
> /*
> @@ -566,13 +565,13 @@ static const struct file_operations
> available_monitors_ops = {
> */
> static void disable_all_monitors(void)
> {
> - struct rv_monitor_def *mdef;
> + struct rv_monitor *mon;
> int enabled = 0;
>
> mutex_lock(&rv_interface_lock);
>
> - list_for_each_entry(mdef, &rv_monitors_list, list)
> - enabled += __rv_disable_monitor(mdef, false);
> + list_for_each_entry(mon, &rv_monitors_list, list)
> + enabled += __rv_disable_monitor(mon, false);
>
> if (enabled) {
> /*
> @@ -598,7 +597,7 @@ static ssize_t enabled_monitors_write(struct file
> *filp, const char __user *user
> size_t count, loff_t *ppos)
> {
> char buff[MAX_RV_MONITOR_NAME_SIZE + 2];
> - struct rv_monitor_def *mdef;
> + struct rv_monitor *mon;
> int retval = -EINVAL;
> bool enable = true;
> char *ptr, *tmp;
> @@ -633,17 +632,17 @@ static ssize_t enabled_monitors_write(struct
> file *filp, const char __user *user
> if (tmp)
> ptr = tmp+1;
>
> - list_for_each_entry(mdef, &rv_monitors_list, list) {
> - if (strcmp(ptr, mdef->monitor->name) != 0)
> + list_for_each_entry(mon, &rv_monitors_list, list) {
> + if (strcmp(ptr, mon->name) != 0)
> continue;
>
> /*
> * Monitor found!
> */
> if (enable)
> - retval = rv_enable_monitor(mdef);
> + retval = rv_enable_monitor(mon);
> else
> - retval = rv_disable_monitor(mdef);
> + retval = rv_disable_monitor(mon);
>
> if (!retval)
> retval = count;
> @@ -702,11 +701,11 @@ static void turn_monitoring_off(void)
>
> static void reset_all_monitors(void)
> {
> - struct rv_monitor_def *mdef;
> + struct rv_monitor *mon;
>
> - list_for_each_entry(mdef, &rv_monitors_list, list) {
> - if (mdef->monitor->enabled && mdef->monitor->reset)
> - mdef->monitor->reset();
> + list_for_each_entry(mon, &rv_monitors_list, list) {
> + if (mon->enabled && mon->reset)
> + mon->reset();
> }
> }
>
> @@ -768,10 +767,10 @@ static const struct file_operations
> monitoring_on_fops = {
> .read = monitoring_on_read_data,
> };
>
> -static void destroy_monitor_dir(struct rv_monitor_def *mdef)
> +static void destroy_monitor_dir(struct rv_monitor *mon)
> {
> - reactor_cleanup_monitor(mdef);
> - rv_remove(mdef->root_d);
> + reactor_cleanup_monitor(mon);
> + rv_remove(mon->root_d);
> }
>
> /**
> @@ -783,7 +782,7 @@ static void destroy_monitor_dir(struct
> rv_monitor_def *mdef)
> */
> int rv_register_monitor(struct rv_monitor *monitor, struct
> rv_monitor *parent)
> {
> - struct rv_monitor_def *r, *p = NULL;
> + struct rv_monitor *r;
> int retval = 0;
>
> if (strlen(monitor->name) >= MAX_RV_MONITOR_NAME_SIZE) {
> @@ -795,49 +794,31 @@ int rv_register_monitor(struct rv_monitor
> *monitor, struct rv_monitor *parent)
> mutex_lock(&rv_interface_lock);
>
> list_for_each_entry(r, &rv_monitors_list, list) {
> - if (strcmp(monitor->name, r->monitor->name) == 0) {
> + if (strcmp(monitor->name, r->name) == 0) {
> pr_info("Monitor %s is already
> registered\n", monitor->name);
> retval = -EEXIST;
> goto out_unlock;
> }
> }
>
> - if (parent) {
> - list_for_each_entry(r, &rv_monitors_list, list) {
> - if (strcmp(parent->name, r->monitor->name)
> == 0) {
> - p = r;
> - break;
> - }
> - }
> - }
> -
> - if (p && rv_is_nested_monitor(p)) {
> + if (parent && rv_is_nested_monitor(parent)) {
> pr_info("Parent monitor %s is already nested, cannot
> nest further\n",
> parent->name);
> retval = -EINVAL;
> goto out_unlock;
> }
>
> - r = kzalloc(sizeof(struct rv_monitor_def), GFP_KERNEL);
> - if (!r) {
> - retval = -ENOMEM;
> - goto out_unlock;
> - }
> -
> - r->monitor = monitor;
> - r->parent = parent;
> + monitor->parent = parent;
>
> - retval = create_monitor_dir(r, p);
> - if (retval) {
> - kfree(r);
> - goto out_unlock;
> - }
> + retval = create_monitor_dir(monitor, parent);
> + if (retval)
> + return retval;
>
> /* keep children close to the parent for easier
> visualisation */
> - if (p)
> - list_add(&r->list, &p->list);
> + if (parent)
> + list_add(&monitor->list, &parent->list);
> else
> - list_add_tail(&r->list, &rv_monitors_list);
> + list_add_tail(&monitor->list, &rv_monitors_list);
>
> out_unlock:
> mutex_unlock(&rv_interface_lock);
> @@ -852,17 +833,11 @@ int rv_register_monitor(struct rv_monitor
> *monitor, struct rv_monitor *parent)
> */
> int rv_unregister_monitor(struct rv_monitor *monitor)
> {
> - struct rv_monitor_def *ptr, *next;
> -
> mutex_lock(&rv_interface_lock);
>
> - list_for_each_entry_safe(ptr, next, &rv_monitors_list, list)
> {
> - if (strcmp(monitor->name, ptr->monitor->name) == 0)
> {
> - rv_disable_monitor(ptr);
> - list_del(&ptr->list);
> - destroy_monitor_dir(ptr);
> - }
> - }
> + rv_disable_monitor(monitor);
> + list_del(&monitor->list);
> + destroy_monitor_dir(monitor);
>
> mutex_unlock(&rv_interface_lock);
> return 0;
> diff --git a/kernel/trace/rv/rv.h b/kernel/trace/rv/rv.h
> index 873364094402..f039ec1c9156 100644
> --- a/kernel/trace/rv/rv.h
> +++ b/kernel/trace/rv/rv.h
> @@ -32,34 +32,23 @@ struct rv_reactor_def {
> };
> #endif
>
> -struct rv_monitor_def {
> - struct list_head list;
> - struct rv_monitor *monitor;
> - struct rv_monitor *parent;
> - struct dentry *root_d;
> -#ifdef CONFIG_RV_REACTORS
> - struct rv_reactor_def *rdef;
> - bool reacting;
> -#endif
> -};
> -
> struct dentry *get_monitors_root(void);
> -int rv_disable_monitor(struct rv_monitor_def *mdef);
> -int rv_enable_monitor(struct rv_monitor_def *mdef);
> -bool rv_is_container_monitor(struct rv_monitor_def *mdef);
> -bool rv_is_nested_monitor(struct rv_monitor_def *mdef);
> +int rv_disable_monitor(struct rv_monitor *mon);
> +int rv_enable_monitor(struct rv_monitor *mon);
> +bool rv_is_container_monitor(struct rv_monitor *mon);
> +bool rv_is_nested_monitor(struct rv_monitor *mon);
>
> #ifdef CONFIG_RV_REACTORS
> -int reactor_populate_monitor(struct rv_monitor_def *mdef);
> -void reactor_cleanup_monitor(struct rv_monitor_def *mdef);
> +int reactor_populate_monitor(struct rv_monitor *mon);
> +void reactor_cleanup_monitor(struct rv_monitor *mon);
> int init_rv_reactors(struct dentry *root_dir);
> #else
> -static inline int reactor_populate_monitor(struct rv_monitor_def
> *mdef)
> +static inline int reactor_populate_monitor(struct rv_monitor *mon)
> {
> return 0;
> }
>
> -static inline void reactor_cleanup_monitor(struct rv_monitor_def
> *mdef)
> +static inline void reactor_cleanup_monitor(struct rv_monitor *mon)
> {
> return;
> }
> diff --git a/kernel/trace/rv/rv_reactors.c
> b/kernel/trace/rv/rv_reactors.c
> index 740603670dd1..7cc620a1be1a 100644
> --- a/kernel/trace/rv/rv_reactors.c
> +++ b/kernel/trace/rv/rv_reactors.c
> @@ -138,10 +138,10 @@ static const struct file_operations
> available_reactors_ops = {
> */
> static int monitor_reactor_show(struct seq_file *m, void *p)
> {
> - struct rv_monitor_def *mdef = m->private;
> + struct rv_monitor *mon = m->private;
> struct rv_reactor_def *rdef = p;
>
> - if (mdef->rdef == rdef)
> + if (mon->rdef == rdef)
> seq_printf(m, "[%s]\n", rdef->reactor->name);
> else
> seq_printf(m, "%s\n", rdef->reactor->name);
> @@ -158,41 +158,41 @@ static const struct seq_operations
> monitor_reactors_seq_ops = {
> .show = monitor_reactor_show
> };
>
> -static void monitor_swap_reactors_single(struct rv_monitor_def
> *mdef,
> +static void monitor_swap_reactors_single(struct rv_monitor *mon,
> struct rv_reactor_def
> *rdef,
> bool reacting, bool nested)
> {
> bool monitor_enabled;
>
> /* nothing to do */
> - if (mdef->rdef == rdef)
> + if (mon->rdef == rdef)
> return;
>
> - monitor_enabled = mdef->monitor->enabled;
> + monitor_enabled = mon->enabled;
> if (monitor_enabled)
> - rv_disable_monitor(mdef);
> + rv_disable_monitor(mon);
>
> /* swap reactor's usage */
> - mdef->rdef->counter--;
> + mon->rdef->counter--;
> rdef->counter++;
>
> - mdef->rdef = rdef;
> - mdef->reacting = reacting;
> - mdef->monitor->react = rdef->reactor->react;
> + mon->rdef = rdef;
> + mon->reacting = reacting;
> + mon->react = rdef->reactor->react;
>
> /* enable only once if iterating through a container */
> if (monitor_enabled && !nested)
> - rv_enable_monitor(mdef);
> + rv_enable_monitor(mon);
> }
>
> -static void monitor_swap_reactors(struct rv_monitor_def *mdef,
> +static void monitor_swap_reactors(struct rv_monitor *mon,
> struct rv_reactor_def *rdef, bool
> reacting)
> {
> - struct rv_monitor_def *p = mdef;
> + struct rv_monitor *p = mon;
>
> - if (rv_is_container_monitor(mdef))
> + if (rv_is_container_monitor(mon))
> list_for_each_entry_continue(p, &rv_monitors_list,
> list) {
> - if (p->parent != mdef->monitor)
> + if (p->parent != mon)
> break;
> monitor_swap_reactors_single(p, rdef,
> reacting, true);
> }
> @@ -202,7 +202,7 @@ static void monitor_swap_reactors(struct
> rv_monitor_def *mdef,
> * All nested monitors are enabled also if they were off, we
> may refine
> * this logic in the future.
> */
> - monitor_swap_reactors_single(mdef, rdef, reacting, false);
> + monitor_swap_reactors_single(mon, rdef, reacting, false);
> }
>
> static ssize_t
> @@ -210,7 +210,7 @@ monitor_reactors_write(struct file *file, const
> char __user *user_buf,
> size_t count, loff_t *ppos)
> {
> char buff[MAX_RV_REACTOR_NAME_SIZE + 2];
> - struct rv_monitor_def *mdef;
> + struct rv_monitor *mon;
> struct rv_reactor_def *rdef;
> struct seq_file *seq_f;
> int retval = -EINVAL;
> @@ -237,7 +237,7 @@ monitor_reactors_write(struct file *file, const
> char __user *user_buf,
> * See monitor_reactors_open()
> */
> seq_f = file->private_data;
> - mdef = seq_f->private;
> + mon = seq_f->private;
>
> mutex_lock(&rv_interface_lock);
>
> @@ -252,7 +252,7 @@ monitor_reactors_write(struct file *file, const
> char __user *user_buf,
> else
> enable = true;
>
> - monitor_swap_reactors(mdef, rdef, enable);
> + monitor_swap_reactors(mon, rdef, enable);
>
> retval = count;
> break;
> @@ -268,7 +268,7 @@ monitor_reactors_write(struct file *file, const
> char __user *user_buf,
> */
> static int monitor_reactors_open(struct inode *inode, struct file
> *file)
> {
> - struct rv_monitor_def *mdef = inode->i_private;
> + struct rv_monitor *mon = inode->i_private;
> struct seq_file *seq_f;
> int ret;
>
> @@ -284,7 +284,7 @@ static int monitor_reactors_open(struct inode
> *inode, struct file *file)
> /*
> * Copy the create file "private" data to the seq_file
> private data.
> */
> - seq_f->private = mdef;
> + seq_f->private = mon;
>
> return 0;
> };
> @@ -454,37 +454,37 @@ static const struct file_operations
> reacting_on_fops = {
>
> /**
> * reactor_populate_monitor - creates per monitor reactors file
> - * @mdef: monitor's definition.
> + * @mon: The monitor.
> *
> * Returns 0 if successful, error otherwise.
> */
> -int reactor_populate_monitor(struct rv_monitor_def *mdef)
> +int reactor_populate_monitor(struct rv_monitor *mon)
> {
> struct dentry *tmp;
>
> - tmp = rv_create_file("reactors", RV_MODE_WRITE, mdef-
> >root_d, mdef, &monitor_reactors_ops);
> + tmp = rv_create_file("reactors", RV_MODE_WRITE, mon->root_d,
> mon, &monitor_reactors_ops);
> if (!tmp)
> return -ENOMEM;
>
> /*
> * Configure as the rv_nop reactor.
> */
> - mdef->rdef = get_reactor_rdef_by_name("nop");
> - mdef->rdef->counter++;
> - mdef->reacting = false;
> + mon->rdef = get_reactor_rdef_by_name("nop");
> + mon->rdef->counter++;
> + mon->reacting = false;
>
> return 0;
> }
>
> /**
> * reactor_cleanup_monitor - cleanup a monitor reference
> - * @mdef: monitor's definition.
> + * @mon: the monitor.
> */
> -void reactor_cleanup_monitor(struct rv_monitor_def *mdef)
> +void reactor_cleanup_monitor(struct rv_monitor *mon)
> {
> lockdep_assert_held(&rv_interface_lock);
> - mdef->rdef->counter--;
> - WARN_ON_ONCE(mdef->rdef->counter < 0);
> + mon->rdef->counter--;
> + WARN_ON_ONCE(mon->rdef->counter < 0);
> }
>
> /*
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