diff options
Diffstat (limited to 'kernel/sysctl.c')
| -rw-r--r-- | kernel/sysctl.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/kernel/sysctl.c b/kernel/sysctl.c index e52b6e372c60..85c92e2c2570 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -1237,6 +1237,30 @@ static int do_proc_dointvec_ms_jiffies_conv(bool *negp, unsigned long *lvalp, return 0; } +static int do_proc_dointvec_ms_jiffies_minmax_conv(bool *negp, unsigned long *lvalp, + int *valp, int write, void *data) +{ + int tmp, ret; + struct do_proc_dointvec_minmax_conv_param *param = data; + /* + * If writing, first do so via a temporary local int so we can + * bounds-check it before touching *valp. + */ + int *ip = write ? &tmp : valp; + + ret = do_proc_dointvec_ms_jiffies_conv(negp, lvalp, ip, write, data); + if (ret) + return ret; + + if (write) { + if ((param->min && *param->min > tmp) || + (param->max && *param->max < tmp)) + return -EINVAL; + *valp = tmp; + } + return 0; +} + /** * proc_dointvec_jiffies - read a vector of integers as seconds * @table: the sysctl table @@ -1259,6 +1283,17 @@ int proc_dointvec_jiffies(struct ctl_table *table, int write, do_proc_dointvec_jiffies_conv,NULL); } +int proc_dointvec_ms_jiffies_minmax(struct ctl_table *table, int write, + void *buffer, size_t *lenp, loff_t *ppos) +{ + struct do_proc_dointvec_minmax_conv_param param = { + .min = (int *) table->extra1, + .max = (int *) table->extra2, + }; + return do_proc_dointvec(table, write, buffer, lenp, ppos, + do_proc_dointvec_ms_jiffies_minmax_conv, ¶m); +} + /** * proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds * @table: the sysctl table @@ -1523,6 +1558,12 @@ int proc_dointvec_jiffies(struct ctl_table *table, int write, return -ENOSYS; } +int proc_dointvec_ms_jiffies_minmax(struct ctl_table *table, int write, + void *buffer, size_t *lenp, loff_t *ppos) +{ + return -ENOSYS; +} + int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, void *buffer, size_t *lenp, loff_t *ppos) { |