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params: lift param_set_uint_minmax to common code 

It is a useful helper hence move it to common code so others can enjoy
it.

Suggested-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Sagi Grimberg 2021-06-16 14:19:33 -07:00 committed by Christoph Hellwig
parent 9ea9b9c483
commit 2a14c9ae15
3 changed files with 20 additions and 18 deletions
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2
include/linux/moduleparam.h
View File

@ -431,6 +431,8 @@ extern int param_get_int(char *buffer, const struct kernel_param *kp);
extern const struct kernel_param_ops param_ops_uint; extern const struct kernel_param_ops param_ops_uint;
extern int param_set_uint(const char *val, const struct kernel_param *kp); extern int param_set_uint(const char *val, const struct kernel_param *kp);
extern int param_get_uint(char *buffer, const struct kernel_param *kp); extern int param_get_uint(char *buffer, const struct kernel_param *kp);
int param_set_uint_minmax(const char *val, const struct kernel_param *kp,
unsigned int min, unsigned int max);
#define param_check_uint(name, p) __param_check(name, p, unsigned int) #define param_check_uint(name, p) __param_check(name, p, unsigned int)
extern const struct kernel_param_ops param_ops_long; extern const struct kernel_param_ops param_ops_long;

18
kernel/params.c
View File

@ -243,6 +243,24 @@ STANDARD_PARAM_DEF(ulong, unsigned long, "%lu", kstrtoul);
STANDARD_PARAM_DEF(ullong, unsigned long long, "%llu", kstrtoull); STANDARD_PARAM_DEF(ullong, unsigned long long, "%llu", kstrtoull);
STANDARD_PARAM_DEF(hexint, unsigned int, "%#08x", kstrtouint); STANDARD_PARAM_DEF(hexint, unsigned int, "%#08x", kstrtouint);
int param_set_uint_minmax(const char *val, const struct kernel_param *kp,
unsigned int min, unsigned int max)
{
unsigned int num;
int ret;
if (!val)
return -EINVAL;
ret = kstrtouint(val, 0, &num);
if (ret)
return ret;
if (num < min || num > max)
return -EINVAL;
*((unsigned int *)kp->arg) = num;
return 0;
}
EXPORT_SYMBOL_GPL(param_set_uint_minmax);
int param_set_charp(const char *val, const struct kernel_param *kp) int param_set_charp(const char *val, const struct kernel_param *kp)
{ {
if (strlen(val) > 1024) { if (strlen(val) > 1024) {

18
net/sunrpc/xprtsock.c
View File

@ -3149,24 +3149,6 @@ void cleanup_socket_xprt(void)
xprt_unregister_transport(&xs_bc_tcp_transport); xprt_unregister_transport(&xs_bc_tcp_transport);
} }
static int param_set_uint_minmax(const char *val,
const struct kernel_param *kp,
unsigned int min, unsigned int max)
{
unsigned int num;
int ret;
if (!val)
return -EINVAL;
ret = kstrtouint(val, 0, &num);
if (ret)
return ret;
if (num < min || num > max)
return -EINVAL;
*((unsigned int *)kp->arg) = num;
return 0;
}
static int param_set_portnr(const char *val, const struct kernel_param *kp) static int param_set_portnr(const char *val, const struct kernel_param *kp)
{ {
return param_set_uint_minmax(val, kp, return param_set_uint_minmax(val, kp,