[PATCH v2 -next 09/11] cgroup/cpuset: move v1 interfaces to cpuset-v1.c

Chen Ridong
2024-08-26T13:34:55Z

Move legacy cpuset controller interfaces files and corresponding code
into cpuset-v1.c. 'update_flag', 'cpuset_write_resmask' and
'cpuset_common_seq_show' are also used for v1, so declare them in
cpuset-internal.h.

'cpuset_write_s64', 'cpuset_read_s64' and 'fmeter_getrate' are only used
cpuset-v1.c now, make it static.

Signed-off-by: Chen Ridong <chenridong@huawei.com>
---
kernel/cgroup/cpuset-internal.h | 9 +-
kernel/cgroup/cpuset-v1.c | 194 ++++++++++++++++++++++++++++++-
kernel/cgroup/cpuset.c | 195 +-------------------------------
3 files changed, 199 insertions(+), 199 deletions(-)

diff --git a/kernel/cgroup/cpuset-internal.h b/kernel/cgroup/cpuset-internal.h
index 07551ff0812e..a6c71c86e58d 100644
--- a/kernel/cgroup/cpuset-internal.h
+++ b/kernel/cgroup/cpuset-internal.h
@@ -271,15 +271,16 @@ void callback_lock_irq(void);
void callback_unlock_irq(void);
void update_tasks_cpumask(struct cpuset *cs, struct cpumask *new_cpus);
void update_tasks_nodemask(struct cpuset *cs);
+int update_flag(cpuset_flagbits_t bit, struct cpuset *cs, int turning_on);
+ssize_t cpuset_write_resmask(struct kernfs_open_file *of,
+ char *buf, size_t nbytes, loff_t off);
+int cpuset_common_seq_show(struct seq_file *sf, void *v);

/*
* cpuset-v1.c
*/
+extern struct cftype legacy_files[];
void fmeter_init(struct fmeter *fmp);
-int fmeter_getrate(struct fmeter *fmp);
-int cpuset_write_s64(struct cgroup_subsys_state *css, struct cftype *cft,
- s64 val);
-s64 cpuset_read_s64(struct cgroup_subsys_state *css, struct cftype *cft);
void cpuset_update_task_spread_flags(struct cpuset *cs,
struct task_struct *tsk);
void update_tasks_flags(struct cpuset *cs);
diff --git a/kernel/cgroup/cpuset-v1.c b/kernel/cgroup/cpuset-v1.c
index 246fc962f549..ffb8711cc8fa 100644
--- a/kernel/cgroup/cpuset-v1.c
+++ b/kernel/cgroup/cpuset-v1.c
@@ -100,7 +100,7 @@ static void fmeter_markevent(struct fmeter *fmp)
}

/* Process any previous ticks, then return current value. */
-int fmeter_getrate(struct fmeter *fmp)
+static int fmeter_getrate(struct fmeter *fmp)
{
int val;

@@ -161,7 +161,7 @@ static int update_relax_domain_level(struct cpuset *cs, s64 val)
return 0;
}

-int cpuset_write_s64(struct cgroup_subsys_state *css, struct cftype *cft,
+static int cpuset_write_s64(struct cgroup_subsys_state *css, struct cftype *cft,
s64 val)
{
struct cpuset *cs = css_cs(css);
@@ -187,7 +187,7 @@ int cpuset_write_s64(struct cgroup_subsys_state *css, struct cftype *cft,
return retval;
}

-s64 cpuset_read_s64(struct cgroup_subsys_state *css, struct cftype *cft)
+static s64 cpuset_read_s64(struct cgroup_subsys_state *css, struct cftype *cft)
{
struct cpuset *cs = css_cs(css);
cpuset_filetype_t type = cft->private;
@@ -373,3 +373,191 @@ int validate_change_legacy(struct cpuset *cur, struct cpuset *trial)
return ret;
}

+static u64 cpuset_read_u64(struct cgroup_subsys_state *css, struct cftype *cft)
+{
+ struct cpuset *cs = css_cs(css);
+ cpuset_filetype_t type = cft->private;
+
+ switch (type) {
+ case FILE_CPU_EXCLUSIVE:
+ return is_cpu_exclusive(cs);
+ case FILE_MEM_EXCLUSIVE:
+ return is_mem_exclusive(cs);
+ case FILE_MEM_HARDWALL:
+ return is_mem_hardwall(cs);
+ case FILE_SCHED_LOAD_BALANCE:
+ return is_sched_load_balance(cs);
+ case FILE_MEMORY_MIGRATE:
+ return is_memory_migrate(cs);
+ case FILE_MEMORY_PRESSURE_ENABLED:
+ return cpuset_memory_pressure_enabled;
+ case FILE_MEMORY_PRESSURE:
+ return fmeter_getrate(&cs->fmeter);
+ case FILE_SPREAD_PAGE:
+ return is_spread_page(cs);
+ case FILE_SPREAD_SLAB:
+ return is_spread_slab(cs);
+ default:
+ BUG();
+ }
+
+ /* Unreachable but makes gcc happy */
+ return 0;
+}
+
+static int cpuset_write_u64(struct cgroup_subsys_state *css, struct cftype *cft,
+ u64 val)
+{
+ struct cpuset *cs = css_cs(css);
+ cpuset_filetype_t type = cft->private;
+ int retval = 0;
+
+ cpus_read_lock();
+ cpuset_lock();
+ if (!is_cpuset_online(cs)) {
+ retval = -ENODEV;
+ goto out_unlock;
+ }
+
+ switch (type) {
+ case FILE_CPU_EXCLUSIVE:
+ retval = update_flag(CS_CPU_EXCLUSIVE, cs, val);
+ break;
+ case FILE_MEM_EXCLUSIVE:
+ retval = update_flag(CS_MEM_EXCLUSIVE, cs, val);
+ break;
+ case FILE_MEM_HARDWALL:
+ retval = update_flag(CS_MEM_HARDWALL, cs, val);
+ break;
+ case FILE_SCHED_LOAD_BALANCE:
+ retval = update_flag(CS_SCHED_LOAD_BALANCE, cs, val);
+ break;
+ case FILE_MEMORY_MIGRATE:
+ retval = update_flag(CS_MEMORY_MIGRATE, cs, val);
+ break;
+ case FILE_MEMORY_PRESSURE_ENABLED:
+ cpuset_memory_pressure_enabled = !!val;
+ break;
+ case FILE_SPREAD_PAGE:
+ retval = update_flag(CS_SPREAD_PAGE, cs, val);
+ break;
+ case FILE_SPREAD_SLAB:
+ retval = update_flag(CS_SPREAD_SLAB, cs, val);
+ break;
+ default:
+ retval = -EINVAL;
+ break;
+ }
+out_unlock:
+ cpuset_unlock();
+ cpus_read_unlock();
+ return retval;
+}
+
+/*
+ * for the common functions, 'private' gives the type of file
+ */
+
+struct cftype legacy_files[] = {
+ {
+ .name = "cpus",
+ .seq_show = cpuset_common_seq_show,
+ .write = cpuset_write_resmask,
+ .max_write_len = (100U + 6 * NR_CPUS),
+ .private = FILE_CPULIST,
+ },
+
+ {
+ .name = "mems",
+ .seq_show = cpuset_common_seq_show,
+ .write = cpuset_write_resmask,
+ .max_write_len = (100U + 6 * MAX_NUMNODES),
+ .private = FILE_MEMLIST,
+ },
+
+ {
+ .name = "effective_cpus",
+ .seq_show = cpuset_common_seq_show,
+ .private = FILE_EFFECTIVE_CPULIST,
+ },
+
+ {
+ .name = "effective_mems",
+ .seq_show = cpuset_common_seq_show,
+ .private = FILE_EFFECTIVE_MEMLIST,
+ },
+
+ {
+ .name = "cpu_exclusive",
+ .read_u64 = cpuset_read_u64,
+ .write_u64 = cpuset_write_u64,
+ .private = FILE_CPU_EXCLUSIVE,
+ },
+
+ {
+ .name = "mem_exclusive",
+ .read_u64 = cpuset_read_u64,
+ .write_u64 = cpuset_write_u64,
+ .private = FILE_MEM_EXCLUSIVE,
+ },
+
+ {
+ .name = "mem_hardwall",
+ .read_u64 = cpuset_read_u64,
+ .write_u64 = cpuset_write_u64,
+ .private = FILE_MEM_HARDWALL,
+ },
+
+ {
+ .name = "sched_load_balance",
+ .read_u64 = cpuset_read_u64,
+ .write_u64 = cpuset_write_u64,
+ .private = FILE_SCHED_LOAD_BALANCE,
+ },
+
+ {
+ .name = "sched_relax_domain_level",
+ .read_s64 = cpuset_read_s64,
+ .write_s64 = cpuset_write_s64,
+ .private = FILE_SCHED_RELAX_DOMAIN_LEVEL,
+ },
+
+ {
+ .name = "memory_migrate",
+ .read_u64 = cpuset_read_u64,
+ .write_u64 = cpuset_write_u64,
+ .private = FILE_MEMORY_MIGRATE,
+ },
+
+ {
+ .name = "memory_pressure",
+ .read_u64 = cpuset_read_u64,
+ .private = FILE_MEMORY_PRESSURE,
+ },
+
+ {
+ .name = "memory_spread_page",
+ .read_u64 = cpuset_read_u64,
+ .write_u64 = cpuset_write_u64,
+ .private = FILE_SPREAD_PAGE,
+ },
+
+ {
+ /* obsolete, may be removed in the future */
+ .name = "memory_spread_slab",
+ .read_u64 = cpuset_read_u64,
+ .write_u64 = cpuset_write_u64,
+ .private = FILE_SPREAD_SLAB,
+ },
+
+ {
+ .name = "memory_pressure_enabled",
+ .flags = CFTYPE_ONLY_ON_ROOT,
+ .read_u64 = cpuset_read_u64,
+ .write_u64 = cpuset_write_u64,
+ .private = FILE_MEMORY_PRESSURE_ENABLED,
+ },
+
+ { } /* terminate */
+};
+
diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c
index 4412a4168902..2f52fe488f3a 100644
--- a/kernel/cgroup/cpuset.c
+++ b/kernel/cgroup/cpuset.c
@@ -1107,8 +1107,6 @@ enum partition_cmd {
partcmd_invalidate, /* Make partition invalid */
};

-static int update_flag(cpuset_flagbits_t bit, struct cpuset *cs,
- int turning_on);
static void update_sibling_cpumasks(struct cpuset *parent, struct cpuset *cs,
struct tmpmasks *tmp);

@@ -2703,7 +2701,7 @@ bool current_cpuset_is_being_rebound(void)
* Call with cpuset_mutex held.
*/

-static int update_flag(cpuset_flagbits_t bit, struct cpuset *cs,
+int update_flag(cpuset_flagbits_t bit, struct cpuset *cs,
int turning_on)
{
struct cpuset *trialcs;
@@ -3088,59 +3086,10 @@ static void cpuset_attach(struct cgroup_taskset *tset)
mutex_unlock(&cpuset_mutex);
}

-static int cpuset_write_u64(struct cgroup_subsys_state *css, struct cftype *cft,
- u64 val)
-{
- struct cpuset *cs = css_cs(css);
- cpuset_filetype_t type = cft->private;
- int retval = 0;
-
- cpus_read_lock();
- mutex_lock(&cpuset_mutex);
- if (!is_cpuset_online(cs)) {
- retval = -ENODEV;
- goto out_unlock;
- }
-
- switch (type) {
- case FILE_CPU_EXCLUSIVE:
- retval = update_flag(CS_CPU_EXCLUSIVE, cs, val);
- break;
- case FILE_MEM_EXCLUSIVE:
- retval = update_flag(CS_MEM_EXCLUSIVE, cs, val);
- break;
- case FILE_MEM_HARDWALL:
- retval = update_flag(CS_MEM_HARDWALL, cs, val);
- break;
- case FILE_SCHED_LOAD_BALANCE:
- retval = update_flag(CS_SCHED_LOAD_BALANCE, cs, val);
- break;
- case FILE_MEMORY_MIGRATE:
- retval = update_flag(CS_MEMORY_MIGRATE, cs, val);
- break;
- case FILE_MEMORY_PRESSURE_ENABLED:
- cpuset_memory_pressure_enabled = !!val;
- break;
- case FILE_SPREAD_PAGE:
- retval = update_flag(CS_SPREAD_PAGE, cs, val);
- break;
- case FILE_SPREAD_SLAB:
- retval = update_flag(CS_SPREAD_SLAB, cs, val);
- break;
- default:
- retval = -EINVAL;
- break;
- }
-out_unlock:
- mutex_unlock(&cpuset_mutex);
- cpus_read_unlock();
- return retval;
-}
-
/*
* Common handling for a write to a "cpus" or "mems" file.
*/
-static ssize_t cpuset_write_resmask(struct kernfs_open_file *of,
+ssize_t cpuset_write_resmask(struct kernfs_open_file *of,
char *buf, size_t nbytes, loff_t off)
{
struct cpuset *cs = css_cs(of_css(of));
@@ -3215,7 +3164,7 @@ static ssize_t cpuset_write_resmask(struct kernfs_open_file *of,
* and since these maps can change value dynamically, one could read
* gibberish by doing partial reads while a list was changing.
*/
-static int cpuset_common_seq_show(struct seq_file *sf, void *v)
+int cpuset_common_seq_show(struct seq_file *sf, void *v)
{
struct cpuset *cs = css_cs(seq_css(sf));
cpuset_filetype_t type = seq_cft(sf)->private;
@@ -3256,37 +3205,6 @@ static int cpuset_common_seq_show(struct seq_file *sf, void *v)
return ret;
}

-static u64 cpuset_read_u64(struct cgroup_subsys_state *css, struct cftype *cft)
-{
- struct cpuset *cs = css_cs(css);
- cpuset_filetype_t type = cft->private;
- switch (type) {
- case FILE_CPU_EXCLUSIVE:
- return is_cpu_exclusive(cs);
- case FILE_MEM_EXCLUSIVE:
- return is_mem_exclusive(cs);
- case FILE_MEM_HARDWALL:
- return is_mem_hardwall(cs);
- case FILE_SCHED_LOAD_BALANCE:
- return is_sched_load_balance(cs);
- case FILE_MEMORY_MIGRATE:
- return is_memory_migrate(cs);
- case FILE_MEMORY_PRESSURE_ENABLED:
- return cpuset_memory_pressure_enabled;
- case FILE_MEMORY_PRESSURE:
- return fmeter_getrate(&cs->fmeter);
- case FILE_SPREAD_PAGE:
- return is_spread_page(cs);
- case FILE_SPREAD_SLAB:
- return is_spread_slab(cs);
- default:
- BUG();
- }
-
- /* Unreachable but makes gcc happy */
- return 0;
-}
-
static int sched_partition_show(struct seq_file *seq, void *v)
{
struct cpuset *cs = css_cs(seq_css(seq));
@@ -3350,113 +3268,6 @@ static ssize_t sched_partition_write(struct kernfs_open_file *of, char *buf,
return retval ?: nbytes;
}

-/*
- * for the common functions, 'private' gives the type of file
- */
-
-static struct cftype legacy_files[] = {
- {
- .name = "cpus",
- .seq_show = cpuset_common_seq_show,
- .write = cpuset_write_resmask,
- .max_write_len = (100U + 6 * NR_CPUS),
- .private = FILE_CPULIST,
- },
-
- {
- .name = "mems",
- .seq_show = cpuset_common_seq_show,
- .write = cpuset_write_resmask,
- .max_write_len = (100U + 6 * MAX_NUMNODES),
- .private = FILE_MEMLIST,
- },
-
- {
- .name = "effective_cpus",
- .seq_show = cpuset_common_seq_show,
- .private = FILE_EFFECTIVE_CPULIST,
- },
-
- {
- .name = "effective_mems",
- .seq_show = cpuset_common_seq_show,
- .private = FILE_EFFECTIVE_MEMLIST,
- },
-
- {
- .name = "cpu_exclusive",
- .read_u64 = cpuset_read_u64,
- .write_u64 = cpuset_write_u64,
- .private = FILE_CPU_EXCLUSIVE,
- },
-
- {
- .name = "mem_exclusive",
- .read_u64 = cpuset_read_u64,
- .write_u64 = cpuset_write_u64,
- .private = FILE_MEM_EXCLUSIVE,
- },
-
- {
- .name = "mem_hardwall",
- .read_u64 = cpuset_read_u64,
- .write_u64 = cpuset_write_u64,
- .private = FILE_MEM_HARDWALL,
- },
-
- {
- .name = "sched_load_balance",
- .read_u64 = cpuset_read_u64,
- .write_u64 = cpuset_write_u64,
- .private = FILE_SCHED_LOAD_BALANCE,
- },
-
- {
- .name = "sched_relax_domain_level",
- .read_s64 = cpuset_read_s64,
- .write_s64 = cpuset_write_s64,
- .private = FILE_SCHED_RELAX_DOMAIN_LEVEL,
- },
-
- {
- .name = "memory_migrate",
- .read_u64 = cpuset_read_u64,
- .write_u64 = cpuset_write_u64,
- .private = FILE_MEMORY_MIGRATE,
- },
-
- {
- .name = "memory_pressure",
- .read_u64 = cpuset_read_u64,
- .private = FILE_MEMORY_PRESSURE,
- },
-
- {
- .name = "memory_spread_page",
- .read_u64 = cpuset_read_u64,
- .write_u64 = cpuset_write_u64,
- .private = FILE_SPREAD_PAGE,
- },
-
- {
- /* obsolete, may be removed in the future */
- .name = "memory_spread_slab",
- .read_u64 = cpuset_read_u64,
- .write_u64 = cpuset_write_u64,
- .private = FILE_SPREAD_SLAB,
- },
-
- {
- .name = "memory_pressure_enabled",
- .flags = CFTYPE_ONLY_ON_ROOT,
- .read_u64 = cpuset_read_u64,
- .write_u64 = cpuset_write_u64,
- .private = FILE_MEMORY_PRESSURE_ENABLED,
- },
-
- { } /* terminate */
-};
-
/*
* This is currently a minimal set for the default hierarchy. It can be
* expanded later on by migrating more features and control files from v1.
--
2.34.1