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authorVasily Gorbik <gor@linux.ibm.com>2018-07-01 16:59:44 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2018-07-06 08:48:08 +0200
commit6c8021503f728b4b3eda69876c20e1ff30767a22 (patch)
treeed257693403eb582bf37025f18c8edb8594e5d8a /arch/s390/appldata
parents390/cmm: split and simplify cmm pages proc handler (diff)
downloadlinux-6c8021503f728b4b3eda69876c20e1ff30767a22.tar.xz
linux-6c8021503f728b4b3eda69876c20e1ff30767a22.zip
s390/appldata: reuse generic proc handler functions
Simplify appldata proc handlers by reusing generic proc handler functions. Tested-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Reviewed-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/appldata')
-rw-r--r--arch/s390/appldata/appldata_base.c121
1 files changed, 45 insertions, 76 deletions
diff --git a/arch/s390/appldata/appldata_base.c b/arch/s390/appldata/appldata_base.c
index 25c1399b0787..9bf8489df6e6 100644
--- a/arch/s390/appldata/appldata_base.c
+++ b/arch/s390/appldata/appldata_base.c
@@ -206,34 +206,28 @@ static int
appldata_timer_handler(struct ctl_table *ctl, int write,
void __user *buffer, size_t *lenp, loff_t *ppos)
{
- unsigned int len;
- char buf[2];
+ int timer_active = appldata_timer_active;
+ int zero = 0;
+ int one = 1;
+ int rc;
+ struct ctl_table ctl_entry = {
+ .procname = ctl->procname,
+ .data = &timer_active,
+ .maxlen = sizeof(int),
+ .extra1 = &zero,
+ .extra2 = &one,
+ };
+
+ rc = proc_douintvec_minmax(&ctl_entry, write, buffer, lenp, ppos);
+ if (rc < 0 || !write)
+ return rc;
- if (!*lenp || *ppos) {
- *lenp = 0;
- return 0;
- }
- if (!write) {
- memcpy(buf, appldata_timer_active ? "1\n" : "0\n", ARRAY_SIZE(buf));
- len = strnlen(buf, ARRAY_SIZE(buf));
- if (len > *lenp)
- len = *lenp;
- if (copy_to_user(buffer, buf, len))
- return -EFAULT;
- goto out;
- }
- len = *lenp;
- if (copy_from_user(buf, buffer, len > sizeof(buf) ? sizeof(buf) : len))
- return -EFAULT;
spin_lock(&appldata_timer_lock);
- if (buf[0] == '1')
+ if (timer_active)
__appldata_vtimer_setup(APPLDATA_ADD_TIMER);
- else if (buf[0] == '0')
+ else
__appldata_vtimer_setup(APPLDATA_DEL_TIMER);
spin_unlock(&appldata_timer_lock);
-out:
- *lenp = len;
- *ppos += len;
return 0;
}
@@ -247,37 +241,24 @@ static int
appldata_interval_handler(struct ctl_table *ctl, int write,
void __user *buffer, size_t *lenp, loff_t *ppos)
{
- unsigned int len;
- int interval;
- char buf[16];
+ int interval = appldata_interval;
+ int one = 1;
+ int rc;
+ struct ctl_table ctl_entry = {
+ .procname = ctl->procname,
+ .data = &interval,
+ .maxlen = sizeof(int),
+ .extra1 = &one,
+ };
- if (!*lenp || *ppos) {
- *lenp = 0;
- return 0;
- }
- if (!write) {
- len = sprintf(buf, "%i\n", appldata_interval);
- if (len > *lenp)
- len = *lenp;
- if (copy_to_user(buffer, buf, len))
- return -EFAULT;
- goto out;
- }
- len = *lenp;
- if (copy_from_user(buf, buffer, len > sizeof(buf) ? sizeof(buf) : len))
- return -EFAULT;
- interval = 0;
- sscanf(buf, "%i", &interval);
- if (interval <= 0)
- return -EINVAL;
+ rc = proc_dointvec_minmax(&ctl_entry, write, buffer, lenp, ppos);
+ if (rc < 0 || !write)
+ return rc;
spin_lock(&appldata_timer_lock);
appldata_interval = interval;
__appldata_vtimer_setup(APPLDATA_MOD_TIMER);
spin_unlock(&appldata_timer_lock);
-out:
- *lenp = len;
- *ppos += len;
return 0;
}
@@ -292,10 +273,17 @@ appldata_generic_handler(struct ctl_table *ctl, int write,
void __user *buffer, size_t *lenp, loff_t *ppos)
{
struct appldata_ops *ops = NULL, *tmp_ops;
- unsigned int len;
- int rc, found;
- char buf[2];
struct list_head *lh;
+ int rc, found;
+ int active;
+ int zero = 0;
+ int one = 1;
+ struct ctl_table ctl_entry = {
+ .data = &active,
+ .maxlen = sizeof(int),
+ .extra1 = &zero,
+ .extra2 = &one,
+ };
found = 0;
mutex_lock(&appldata_ops_mutex);
@@ -316,31 +304,15 @@ appldata_generic_handler(struct ctl_table *ctl, int write,
}
mutex_unlock(&appldata_ops_mutex);
- if (!*lenp || *ppos) {
- *lenp = 0;
+ active = ops->active;
+ rc = proc_douintvec_minmax(&ctl_entry, write, buffer, lenp, ppos);
+ if (rc < 0 || !write) {
module_put(ops->owner);
- return 0;
- }
- if (!write) {
- memcpy(buf, ops->active ? "1\n" : "0\n", ARRAY_SIZE(buf));
- len = strnlen(buf, ARRAY_SIZE(buf));
- if (len > *lenp)
- len = *lenp;
- if (copy_to_user(buffer, buf, len)) {
- module_put(ops->owner);
- return -EFAULT;
- }
- goto out;
- }
- len = *lenp;
- if (copy_from_user(buf, buffer,
- len > sizeof(buf) ? sizeof(buf) : len)) {
- module_put(ops->owner);
- return -EFAULT;
+ return rc;
}
mutex_lock(&appldata_ops_mutex);
- if ((buf[0] == '1') && (ops->active == 0)) {
+ if (active && (ops->active == 0)) {
// protect work queue callback
if (!try_module_get(ops->owner)) {
mutex_unlock(&appldata_ops_mutex);
@@ -358,7 +330,7 @@ appldata_generic_handler(struct ctl_table *ctl, int write,
module_put(ops->owner);
} else
ops->active = 1;
- } else if ((buf[0] == '0') && (ops->active == 1)) {
+ } else if (!active && (ops->active == 1)) {
ops->active = 0;
rc = appldata_diag(ops->record_nr, APPLDATA_STOP_REC,
(unsigned long) ops->data, ops->size,
@@ -369,9 +341,6 @@ appldata_generic_handler(struct ctl_table *ctl, int write,
module_put(ops->owner);
}
mutex_unlock(&appldata_ops_mutex);
-out:
- *lenp = len;
- *ppos += len;
module_put(ops->owner);
return 0;
}