diff options
Diffstat (limited to 'drivers/mtd/ubi/build.c')
| -rw-r--r-- | drivers/mtd/ubi/build.c | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/drivers/mtd/ubi/build.c b/drivers/mtd/ubi/build.c index 27de0463226e..9b7bc6326fa2 100644 --- a/drivers/mtd/ubi/build.c +++ b/drivers/mtd/ubi/build.c @@ -125,6 +125,9 @@ struct class ubi_class = { static ssize_t dev_attribute_show(struct device *dev, struct device_attribute *attr, char *buf); +static ssize_t dev_attribute_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count); /* UBI device attributes (correspond to files in '/<sysfs>/class/ubi/ubiX') */ static struct device_attribute dev_eraseblock_size = @@ -149,6 +152,13 @@ static struct device_attribute dev_bgt_enabled = __ATTR(bgt_enabled, S_IRUGO, dev_attribute_show, NULL); static struct device_attribute dev_mtd_num = __ATTR(mtd_num, S_IRUGO, dev_attribute_show, NULL); +static struct device_attribute dev_mtd_trigger_scrub = + __ATTR(scrub_all, S_IRUGO | S_IWUSR, + dev_attribute_show, dev_attribute_store); +static struct device_attribute dev_mtd_max_scrub_sqnum = + __ATTR(scrub_max_sqnum, S_IRUGO, dev_attribute_show, NULL); +static struct device_attribute dev_mtd_min_scrub_sqnum = + __ATTR(scrub_min_sqnum, S_IRUGO, dev_attribute_show, NULL); /** * ubi_volume_notify - send a volume change notification. @@ -341,6 +351,17 @@ int ubi_major2num(int major) return ubi_num; } +static unsigned long long get_max_sqnum(struct ubi_device *ubi) +{ + unsigned long long max_sqnum; + + spin_lock(&ubi->ltree_lock); + max_sqnum = ubi->global_sqnum - 1; + spin_unlock(&ubi->ltree_lock); + + return max_sqnum; +} + /* "Show" method for files in '/<sysfs>/class/ubi/ubiX/' */ static ssize_t dev_attribute_show(struct device *dev, struct device_attribute *attr, char *buf) @@ -385,6 +406,12 @@ static ssize_t dev_attribute_show(struct device *dev, ret = sprintf(buf, "%d\n", ubi->thread_enabled); else if (attr == &dev_mtd_num) ret = sprintf(buf, "%d\n", ubi->mtd->index); + else if (attr == &dev_mtd_trigger_scrub) + ret = sprintf(buf, "%d\n", atomic_read(&ubi->scrub_work_count)); + else if (attr == &dev_mtd_max_scrub_sqnum) + ret = sprintf(buf, "%llu\n", get_max_sqnum(ubi)); + else if (attr == &dev_mtd_min_scrub_sqnum) + ret = sprintf(buf, "%llu\n", ubi_wl_scrub_get_min_sqnum(ubi)); else ret = -EINVAL; @@ -404,10 +431,45 @@ static struct attribute *ubi_dev_attrs[] = { &dev_min_io_size.attr, &dev_bgt_enabled.attr, &dev_mtd_num.attr, + &dev_mtd_trigger_scrub.attr, + &dev_mtd_max_scrub_sqnum.attr, + &dev_mtd_min_scrub_sqnum.attr, NULL }; ATTRIBUTE_GROUPS(ubi_dev); +static ssize_t dev_attribute_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + int ret; + struct ubi_device *ubi; + unsigned long long scrub_sqnum; + + ubi = container_of(dev, struct ubi_device, dev); + ubi = ubi_get_device(ubi->ubi_num); + if (!ubi) + return -ENODEV; + + if (attr == &dev_mtd_trigger_scrub) { + if (kstrtoull(buf, 10, &scrub_sqnum)) { + ret = -EINVAL; + goto out; + } + if (!ubi->lookuptbl) { + pr_err("lookuptbl is null"); + goto out; + } + ret = ubi_wl_scrub_all(ubi, scrub_sqnum); + if (ret == 0) + ret = count; + } + +out: + ubi_put_device(ubi); + return ret; +} + static void dev_release(struct device *dev) { struct ubi_device *ubi = container_of(dev, struct ubi_device, dev); |