md: convert to kstrto*()

Convert away from deprecated simple_strto*() functions.

Add "fit into sector_t" checks.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: NeilBrown <neilb@suse.de>

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 4dbed4a67aaf40e3c04bde925870c24d13cd1b4e..b6bbcf0cc430e77b73d6b5e01eb33b444567fb15 100644 (file)
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -2630,13 +2630,14 @@ errors_show(struct md_rdev *rdev, char *page)
 static ssize_t
 errors_store(struct md_rdev *rdev, const char *buf, size_t len)
 {
-       char *e;
-       unsigned long n = simple_strtoul(buf, &e, 10);
-       if (*buf && (*e == 0 || *e == '\n')) {
-               atomic_set(&rdev->corrected_errors, n);
-               return len;
-       }
-       return -EINVAL;
+       unsigned int n;
+       int rv;
+
+       rv = kstrtouint(buf, 10, &n);
+       if (rv < 0)
+               return rv;
+       atomic_set(&rdev->corrected_errors, n);
+       return len;
 }
 static struct rdev_sysfs_entry rdev_errors =
 __ATTR(errors, S_IRUGO|S_IWUSR, errors_show, errors_store);
@@ -2653,13 +2654,16 @@ slot_show(struct md_rdev *rdev, char *page)
 static ssize_t
 slot_store(struct md_rdev *rdev, const char *buf, size_t len)
 {
-       char *e;
+       int slot;
        int err;
-       int slot = simple_strtoul(buf, &e, 10);
+
        if (strncmp(buf, "none", 4)==0)
                slot = -1;
-       else if (e==buf || (*e && *e!= '\n'))
-               return -EINVAL;
+       else {
+               err = kstrtouint(buf, 10, (unsigned int *)&slot);
+               if (err < 0)
+                       return err;
+       }
        if (rdev->mddev->pers && slot == -1) {
                /* Setting 'slot' on an active array requires also
                 * updating the 'rd%d' link, and communicating
@@ -3544,12 +3548,12 @@ layout_show(struct mddev *mddev, char *page)
 static ssize_t
 layout_store(struct mddev *mddev, const char *buf, size_t len)
 {
-       char *e;
-       unsigned long n = simple_strtoul(buf, &e, 10);
+       unsigned int n;
        int err;
 
-       if (!*buf || (*e && *e != '\n'))
-               return -EINVAL;
+       err = kstrtouint(buf, 10, &n);
+       if (err < 0)
+               return err;
        err = mddev_lock(mddev);
        if (err)
                return err;
@@ -3593,12 +3597,12 @@ static int update_raid_disks(struct mddev *mddev, int raid_disks);
 static ssize_t
 raid_disks_store(struct mddev *mddev, const char *buf, size_t len)
 {
-       char *e;
+       unsigned int n;
        int err;
-       unsigned long n = simple_strtoul(buf, &e, 10);
 
-       if (!*buf || (*e && *e != '\n'))
-               return -EINVAL;
+       err = kstrtouint(buf, 10, &n);
+       if (err < 0)
+               return err;
 
        err = mddev_lock(mddev);
        if (err)
@@ -3645,12 +3649,12 @@ chunk_size_show(struct mddev *mddev, char *page)
 static ssize_t
 chunk_size_store(struct mddev *mddev, const char *buf, size_t len)
 {
+       unsigned long n;
        int err;
-       char *e;
-       unsigned long n = simple_strtoul(buf, &e, 10);
 
-       if (!*buf || (*e && *e != '\n'))
-               return -EINVAL;
+       err = kstrtoul(buf, 10, &n);
+       if (err < 0)
+               return err;
 
        err = mddev_lock(mddev);
        if (err)
@@ -3688,19 +3692,24 @@ resync_start_show(struct mddev *mddev, char *page)
 static ssize_t
 resync_start_store(struct mddev *mddev, const char *buf, size_t len)
 {
+       unsigned long long n;
        int err;
-       char *e;
-       unsigned long long n = simple_strtoull(buf, &e, 10);
+
+       if (cmd_match(buf, "none"))
+               n = MaxSector;
+       else {
+               err = kstrtoull(buf, 10, &n);
+               if (err < 0)
+                       return err;
+               if (n != (sector_t)n)
+                       return -EINVAL;
+       }
 
        err = mddev_lock(mddev);
        if (err)
                return err;
        if (mddev->pers && !test_bit(MD_RECOVERY_FROZEN, &mddev->recovery))
                err = -EBUSY;
-       else if (cmd_match(buf, "none"))
-               n = MaxSector;
-       else if (!*buf || (*e && *e != '\n'))
-               err = -EINVAL;
 
        if (!err) {
                mddev->recovery_cp = n;
@@ -3936,14 +3945,14 @@ max_corrected_read_errors_show(struct mddev *mddev, char *page) {
 static ssize_t
 max_corrected_read_errors_store(struct mddev *mddev, const char *buf, size_t len)
 {
-       char *e;
-       unsigned long n = simple_strtoul(buf, &e, 10);
+       unsigned int n;
+       int rv;
 
-       if (*buf && (*e == 0 || *e == '\n')) {
-               atomic_set(&mddev->max_corr_read_errors, n);
-               return len;
-       }
-       return -EINVAL;
+       rv = kstrtouint(buf, 10, &n);
+       if (rv < 0)
+               return rv;
+       atomic_set(&mddev->max_corr_read_errors, n);
+       return len;
 }
 
 static struct md_sysfs_entry max_corr_read_errors =
@@ -4300,15 +4309,18 @@ sync_min_show(struct mddev *mddev, char *page)
 static ssize_t
 sync_min_store(struct mddev *mddev, const char *buf, size_t len)
 {
-       int min;
-       char *e;
+       unsigned int min;
+       int rv;
+
        if (strncmp(buf, "system", 6)==0) {
-               mddev->sync_speed_min = 0;
-               return len;
+               min = 0;
+       } else {
+               rv = kstrtouint(buf, 10, &min);
+               if (rv < 0)
+                       return rv;
+               if (min == 0)
+                       return -EINVAL;
        }
-       min = simple_strtoul(buf, &e, 10);
-       if (buf == e || (*e && *e != '\n') || min <= 0)
-               return -EINVAL;
        mddev->sync_speed_min = min;
        return len;
 }
@@ -4326,15 +4338,18 @@ sync_max_show(struct mddev *mddev, char *page)
 static ssize_t
 sync_max_store(struct mddev *mddev, const char *buf, size_t len)
 {
-       int max;
-       char *e;
+       unsigned int max;
+       int rv;
+
        if (strncmp(buf, "system", 6)==0) {
-               mddev->sync_speed_max = 0;
-               return len;
+               max = 0;
+       } else {
+               rv = kstrtouint(buf, 10, &max);
+               if (rv < 0)
+                       return rv;
+               if (max == 0)
+                       return -EINVAL;
        }
-       max = simple_strtoul(buf, &e, 10);
-       if (buf == e || (*e && *e != '\n') || max <= 0)
-               return -EINVAL;
        mddev->sync_speed_max = max;
        return len;
 }
@@ -4517,12 +4532,13 @@ suspend_lo_show(struct mddev *mddev, char *page)
 static ssize_t
 suspend_lo_store(struct mddev *mddev, const char *buf, size_t len)
 {
-       char *e;
-       unsigned long long new = simple_strtoull(buf, &e, 10);
-       unsigned long long old;
+       unsigned long long old, new;
        int err;
 
-       if (buf == e || (*e && *e != '\n'))
+       err = kstrtoull(buf, 10, &new);
+       if (err < 0)
+               return err;
+       if (new != (sector_t)new)
                return -EINVAL;
 
        err = mddev_lock(mddev);
@@ -4559,12 +4575,13 @@ suspend_hi_show(struct mddev *mddev, char *page)
 static ssize_t
 suspend_hi_store(struct mddev *mddev, const char *buf, size_t len)
 {
-       char *e;
-       unsigned long long new = simple_strtoull(buf, &e, 10);
-       unsigned long long old;
+       unsigned long long old, new;
        int err;
 
-       if (buf == e || (*e && *e != '\n'))
+       err = kstrtoull(buf, 10, &new);
+       if (err < 0)
+               return err;
+       if (new != (sector_t)new)
                return -EINVAL;
 
        err = mddev_lock(mddev);
@@ -4606,11 +4623,13 @@ static ssize_t
 reshape_position_store(struct mddev *mddev, const char *buf, size_t len)
 {
        struct md_rdev *rdev;
-       char *e;
+       unsigned long long new;
        int err;
-       unsigned long long new = simple_strtoull(buf, &e, 10);
 
-       if (buf == e || (*e && *e != '\n'))
+       err = kstrtoull(buf, 10, &new);
+       if (err < 0)
+               return err;
+       if (new != (sector_t)new)
                return -EINVAL;
        err = mddev_lock(mddev);
        if (err)
@@ -9013,13 +9032,7 @@ static int get_ro(char *buffer, struct kernel_param *kp)
 }
 static int set_ro(const char *val, struct kernel_param *kp)
 {
-       char *e;
-       int num = simple_strtoul(val, &e, 10);
-       if (*val && (*e == '\0' || *e == '\n')) {
-               start_readonly = num;
-               return 0;
-       }
-       return -EINVAL;
+       return kstrtouint(val, 10, (unsigned int *)&start_readonly);
 }
 
 module_param_call(start_ro, set_ro, get_ro, NULL, S_IRUSR|S_IWUSR);