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-rw-r--r--kernel/sysctl.c171
1 files changed, 76 insertions, 95 deletions
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 62fbd09b5dc1..f91d327273c1 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -148,6 +148,9 @@ static unsigned long hung_task_timeout_max = (LONG_MAX/HZ);
#ifdef CONFIG_INOTIFY_USER
#include <linux/inotify.h>
#endif
+#ifdef CONFIG_FANOTIFY
+#include <linux/fanotify.h>
+#endif
#ifdef CONFIG_PROC_SYSCTL
@@ -184,17 +187,6 @@ static enum sysctl_writes_mode sysctl_writes_strict = SYSCTL_WRITES_STRICT;
int sysctl_legacy_va_layout;
#endif
-#ifdef CONFIG_SCHED_DEBUG
-static int min_sched_granularity_ns = 100000; /* 100 usecs */
-static int max_sched_granularity_ns = NSEC_PER_SEC; /* 1 second */
-static int min_wakeup_granularity_ns; /* 0 usecs */
-static int max_wakeup_granularity_ns = NSEC_PER_SEC; /* 1 second */
-#ifdef CONFIG_SMP
-static int min_sched_tunable_scaling = SCHED_TUNABLESCALING_NONE;
-static int max_sched_tunable_scaling = SCHED_TUNABLESCALING_END-1;
-#endif /* CONFIG_SMP */
-#endif /* CONFIG_SCHED_DEBUG */
-
#ifdef CONFIG_COMPACTION
static int min_extfrag_threshold;
static int max_extfrag_threshold = 1000;
@@ -1034,6 +1026,65 @@ int proc_douintvec_minmax(struct ctl_table *table, int write,
do_proc_douintvec_minmax_conv, &param);
}
+/**
+ * proc_dou8vec_minmax - read a vector of unsigned chars with min/max values
+ * @table: the sysctl table
+ * @write: %TRUE if this is a write to the sysctl file
+ * @buffer: the user buffer
+ * @lenp: the size of the user buffer
+ * @ppos: file position
+ *
+ * Reads/writes up to table->maxlen/sizeof(u8) unsigned chars
+ * values from/to the user buffer, treated as an ASCII string. Negative
+ * strings are not allowed.
+ *
+ * This routine will ensure the values are within the range specified by
+ * table->extra1 (min) and table->extra2 (max).
+ *
+ * Returns 0 on success or an error on write when the range check fails.
+ */
+int proc_dou8vec_minmax(struct ctl_table *table, int write,
+ void *buffer, size_t *lenp, loff_t *ppos)
+{
+ struct ctl_table tmp;
+ unsigned int min = 0, max = 255U, val;
+ u8 *data = table->data;
+ struct do_proc_douintvec_minmax_conv_param param = {
+ .min = &min,
+ .max = &max,
+ };
+ int res;
+
+ /* Do not support arrays yet. */
+ if (table->maxlen != sizeof(u8))
+ return -EINVAL;
+
+ if (table->extra1) {
+ min = *(unsigned int *) table->extra1;
+ if (min > 255U)
+ return -EINVAL;
+ }
+ if (table->extra2) {
+ max = *(unsigned int *) table->extra2;
+ if (max > 255U)
+ return -EINVAL;
+ }
+
+ tmp = *table;
+
+ tmp.maxlen = sizeof(val);
+ tmp.data = &val;
+ val = *data;
+ res = do_proc_douintvec(&tmp, write, buffer, lenp, ppos,
+ do_proc_douintvec_minmax_conv, &param);
+ if (res)
+ return res;
+ if (write)
+ *data = val;
+ return 0;
+}
+EXPORT_SYMBOL_GPL(proc_dou8vec_minmax);
+
static int do_proc_dopipe_max_size_conv(unsigned long *lvalp,
unsigned int *valp,
int write, void *data)
@@ -1582,6 +1633,12 @@ int proc_douintvec_minmax(struct ctl_table *table, int write,
return -ENOSYS;
}
+int proc_dou8vec_minmax(struct ctl_table *table, int write,
+ void *buffer, size_t *lenp, loff_t *ppos)
+{
+ return -ENOSYS;
+}
+
int proc_dointvec_jiffies(struct ctl_table *table, int write,
void *buffer, size_t *lenp, loff_t *ppos)
{
@@ -1659,58 +1716,6 @@ static struct ctl_table kern_table[] = {
.mode = 0644,
.proc_handler = proc_dointvec,
},
-#ifdef CONFIG_SCHED_DEBUG
- {
- .procname = "sched_min_granularity_ns",
- .data = &sysctl_sched_min_granularity,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = sched_proc_update_handler,
- .extra1 = &min_sched_granularity_ns,
- .extra2 = &max_sched_granularity_ns,
- },
- {
- .procname = "sched_latency_ns",
- .data = &sysctl_sched_latency,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = sched_proc_update_handler,
- .extra1 = &min_sched_granularity_ns,
- .extra2 = &max_sched_granularity_ns,
- },
- {
- .procname = "sched_wakeup_granularity_ns",
- .data = &sysctl_sched_wakeup_granularity,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = sched_proc_update_handler,
- .extra1 = &min_wakeup_granularity_ns,
- .extra2 = &max_wakeup_granularity_ns,
- },
-#ifdef CONFIG_SMP
- {
- .procname = "sched_tunable_scaling",
- .data = &sysctl_sched_tunable_scaling,
- .maxlen = sizeof(enum sched_tunable_scaling),
- .mode = 0644,
- .proc_handler = sched_proc_update_handler,
- .extra1 = &min_sched_tunable_scaling,
- .extra2 = &max_sched_tunable_scaling,
- },
- {
- .procname = "sched_migration_cost_ns",
- .data = &sysctl_sched_migration_cost,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
- {
- .procname = "sched_nr_migrate",
- .data = &sysctl_sched_nr_migrate,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
#ifdef CONFIG_SCHEDSTATS
{
.procname = "sched_schedstats",
@@ -1722,38 +1727,8 @@ static struct ctl_table kern_table[] = {
.extra2 = SYSCTL_ONE,
},
#endif /* CONFIG_SCHEDSTATS */
-#endif /* CONFIG_SMP */
#ifdef CONFIG_NUMA_BALANCING
{
- .procname = "numa_balancing_scan_delay_ms",
- .data = &sysctl_numa_balancing_scan_delay,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
- {
- .procname = "numa_balancing_scan_period_min_ms",
- .data = &sysctl_numa_balancing_scan_period_min,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
- {
- .procname = "numa_balancing_scan_period_max_ms",
- .data = &sysctl_numa_balancing_scan_period_max,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
- {
- .procname = "numa_balancing_scan_size_mb",
- .data = &sysctl_numa_balancing_scan_size,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = SYSCTL_ONE,
- },
- {
.procname = "numa_balancing",
.data = NULL, /* filled in by handler */
.maxlen = sizeof(unsigned int),
@@ -1763,7 +1738,6 @@ static struct ctl_table kern_table[] = {
.extra2 = SYSCTL_ONE,
},
#endif /* CONFIG_NUMA_BALANCING */
-#endif /* CONFIG_SCHED_DEBUG */
{
.procname = "sched_rt_period_us",
.data = &sysctl_sched_rt_period,
@@ -3258,7 +3232,14 @@ static struct ctl_table fs_table[] = {
.mode = 0555,
.child = inotify_table,
},
-#endif
+#endif
+#ifdef CONFIG_FANOTIFY
+ {
+ .procname = "fanotify",
+ .mode = 0555,
+ .child = fanotify_table,
+ },
+#endif
#ifdef CONFIG_EPOLL
{
.procname = "epoll",
generated by cgit v1.2.3 (git 2.46.0) at 2025-04-25 15:34:46 +0000