return mutex_lock_interruptible(&mddev->reconfig_mutex);
}
+static inline int mddev_is_locked(mddev_t *mddev)
+{
+ return mutex_is_locked(&mddev->reconfig_mutex);
+}
+
static inline int mddev_trylock(mddev_t * mddev)
{
return mutex_trylock(&mddev->reconfig_mutex);
return 1;
}
+static int strict_blocks_to_sectors(const char *buf, sector_t *sectors)
+{
+ unsigned long long blocks;
+ sector_t new;
+
+ if (strict_strtoull(buf, 10, &blocks) < 0)
+ return -EINVAL;
+
+ if (blocks & 1ULL << (8 * sizeof(blocks) - 1))
+ return -EINVAL; /* sector conversion overflow */
+
+ new = blocks * 2;
+ if (new != blocks * 2)
+ return -EINVAL; /* unsigned long long to sector_t overflow */
+
+ *sectors = new;
+ return 0;
+}
+
static ssize_t
rdev_size_store(mdk_rdev_t *rdev, const char *buf, size_t len)
{
mddev_t *my_mddev = rdev->mddev;
sector_t oldsectors = rdev->sectors;
- unsigned long long sectors;
+ sector_t sectors;
- if (strict_strtoull(buf, 10, §ors) < 0)
+ if (strict_blocks_to_sectors(buf, §ors) < 0)
return -EINVAL;
- sectors *= 2;
if (my_mddev->pers && rdev->raid_disk >= 0) {
if (my_mddev->persistent) {
sectors = super_types[my_mddev->major_version].
if (!*buf || (*e && *e != '\n'))
return -EINVAL;
- if (mddev->pers)
- return -EBUSY;
-
- mddev->new_layout = n;
- if (mddev->reshape_position == MaxSector)
- mddev->layout = n;
+ if (mddev->pers) {
+ int err;
+ if (mddev->pers->reconfig == NULL)
+ return -EBUSY;
+ err = mddev->pers->reconfig(mddev, n, -1);
+ if (err)
+ return err;
+ } else {
+ mddev->new_layout = n;
+ if (mddev->reshape_position == MaxSector)
+ mddev->layout = n;
+ }
return len;
}
static struct md_sysfs_entry md_layout =
static ssize_t
chunk_size_store(mddev_t *mddev, const char *buf, size_t len)
{
- /* can only set chunk_size if array is not yet active */
char *e;
unsigned long n = simple_strtoul(buf, &e, 10);
if (!*buf || (*e && *e != '\n'))
return -EINVAL;
- if (mddev->pers)
- return -EBUSY;
-
- mddev->new_chunk = n;
- if (mddev->reshape_position == MaxSector)
- mddev->chunk_size = n;
+ if (mddev->pers) {
+ int err;
+ if (mddev->pers->reconfig == NULL)
+ return -EBUSY;
+ err = mddev->pers->reconfig(mddev, -1, n);
+ if (err)
+ return err;
+ } else {
+ mddev->new_chunk = n;
+ if (mddev->reshape_position == MaxSector)
+ mddev->chunk_size = n;
+ }
return len;
}
static struct md_sysfs_entry md_chunk_size =
static ssize_t
resync_start_show(mddev_t *mddev, char *page)
{
+ if (mddev->recovery_cp == MaxSector)
+ return sprintf(page, "none\n");
return sprintf(page, "%llu\n", (unsigned long long)mddev->recovery_cp);
}
* not increase it (except from 0).
* If array is active, we can try an on-line resize
*/
- unsigned long long sectors;
- int err = strict_strtoull(buf, 10, §ors);
+ sector_t sectors;
+ int err = strict_blocks_to_sectors(buf, §ors);
if (err < 0)
return err;
- sectors *= 2;
if (mddev->pers) {
err = update_size(mddev, sectors);
md_update_sb(mddev, 1);
sync_speed_show(mddev_t *mddev, char *page)
{
unsigned long resync, dt, db;
+ if (mddev->curr_resync == 0)
+ return sprintf(page, "none\n");
resync = mddev->curr_mark_cnt - atomic_read(&mddev->recovery_active);
dt = (jiffies - mddev->resync_mark) / HZ;
if (!dt) dt++;
__ATTR(reshape_position, S_IRUGO|S_IWUSR, reshape_position_show,
reshape_position_store);
+static ssize_t
+array_size_show(mddev_t *mddev, char *page)
+{
+ if (mddev->external_size)
+ return sprintf(page, "%llu\n",
+ (unsigned long long)mddev->array_sectors/2);
+ else
+ return sprintf(page, "default\n");
+}
+
+static ssize_t
+array_size_store(mddev_t *mddev, const char *buf, size_t len)
+{
+ sector_t sectors;
+
+ if (strncmp(buf, "default", 7) == 0) {
+ if (mddev->pers)
+ sectors = mddev->pers->size(mddev, 0, 0);
+ else
+ sectors = mddev->array_sectors;
+
+ mddev->external_size = 0;
+ } else {
+ if (strict_blocks_to_sectors(buf, §ors) < 0)
+ return -EINVAL;
+ if (mddev->pers && mddev->pers->size(mddev, 0, 0) < sectors)
+ return -EINVAL;
+
+ mddev->external_size = 1;
+ }
+
+ mddev->array_sectors = sectors;
+ set_capacity(mddev->gendisk, mddev->array_sectors);
+ if (mddev->pers) {
+ struct block_device *bdev = bdget_disk(mddev->gendisk, 0);
+
+ if (bdev) {
+ mutex_lock(&bdev->bd_inode->i_mutex);
+ i_size_write(bdev->bd_inode,
+ (loff_t)mddev->array_sectors << 9);
+ mutex_unlock(&bdev->bd_inode->i_mutex);
+ bdput(bdev);
+ }
+ }
+
+ return len;
+}
+
+static struct md_sysfs_entry md_array_size =
+__ATTR(array_size, S_IRUGO|S_IWUSR, array_size_show,
+ array_size_store);
static struct attribute *md_default_attrs[] = {
&md_level.attr,
&md_safe_delay.attr,
&md_array_state.attr,
&md_reshape_position.attr,
+ &md_array_size.attr,
NULL,
};
err = mddev->pers->run(mddev);
if (err)
printk(KERN_ERR "md: pers->run() failed ...\n");
- else if (mddev->pers->sync_request) {
+ else if (mddev->pers->size(mddev, 0, 0) < mddev->array_sectors) {
+ WARN_ONCE(!mddev->external_size, "%s: default size too small,"
+ " but 'external_size' not in effect?\n", __func__);
+ printk(KERN_ERR
+ "md: invalid array_size %llu > default size %llu\n",
+ (unsigned long long)mddev->array_sectors / 2,
+ (unsigned long long)mddev->pers->size(mddev, 0, 0) / 2);
+ err = -EINVAL;
+ mddev->pers->stop(mddev);
+ }
+ if (err == 0 && mddev->pers->sync_request) {
err = bitmap_create(mddev);
if (err) {
printk(KERN_ERR "%s: failed to create bitmap (%d)\n",
export_array(mddev);
mddev->array_sectors = 0;
+ mddev->external_size = 0;
mddev->dev_sectors = 0;
mddev->raid_disks = 0;
mddev->recovery_cp = 0;
return 0;
}
+void md_set_array_sectors(mddev_t *mddev, sector_t array_sectors)
+{
+ WARN(!mddev_is_locked(mddev), "%s: unlocked mddev!\n", __func__);
+
+ if (mddev->external_size)
+ return;
+
+ mddev->array_sectors = array_sectors;
+}
+EXPORT_SYMBOL(md_set_array_sectors);
+
static int update_size(mddev_t *mddev, sector_t num_sectors)
{
mdk_rdev_t *rdev;
sysfs_notify(&mddev->kobj, NULL,
"degraded");
}
+ if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) &&
+ mddev->pers->finish_reshape)
+ mddev->pers->finish_reshape(mddev);
md_update_sb(mddev, 1);
/* if array is no-longer degraded, then any saved_raid_disk
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff