* idle IO detection.
*
* you can change it via /proc/sys/dev/raid/speed_limit_min and _max.
+ * or /sys/block/mdX/md/sync_speed_{min,max}
*/
static int sysctl_speed_limit_min = 1000;
static int sysctl_speed_limit_max = 200000;
+static inline int speed_min(mddev_t *mddev)
+{
+ return mddev->sync_speed_min ?
+ mddev->sync_speed_min : sysctl_speed_limit_min;
+}
+
+static inline int speed_max(mddev_t *mddev)
+{
+ return mddev->sync_speed_max ?
+ mddev->sync_speed_max : sysctl_speed_limit_max;
+}
static struct ctl_table_header *raid_table_header;
sb->cnt_corrected_read = atomic_read(&rdev->corrected_errors);
+ sb->raid_disks = cpu_to_le32(mddev->raid_disks);
+ sb->size = cpu_to_le64(mddev->size);
+
if (mddev->bitmap && mddev->bitmap_file == NULL) {
sb->bitmap_offset = cpu_to_le32((__u32)mddev->bitmap_offset);
sb->feature_map = cpu_to_le32(MD_FEATURE_BITMAP_OFFSET);
mdk_rdev_t *same_pdev;
char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE];
struct kobject *ko;
+ char *s;
if (rdev->mddev) {
MD_BUG();
bdevname(rdev->bdev,b);
if (kobject_set_name(&rdev->kobj, "dev-%s", b) < 0)
return -ENOMEM;
+ while ( (s=strchr(rdev->kobj.k_name, '/')) != NULL)
+ *s = '!';
list_add(&rdev->same_set, &mddev->disks);
rdev->mddev = mddev;
static ssize_t
offset_show(mdk_rdev_t *rdev, char *page)
{
- return sprintf(page, "%llu\n", rdev->data_offset);
+ return sprintf(page, "%llu\n", (unsigned long long)rdev->data_offset);
}
static ssize_t
static struct rdev_sysfs_entry rdev_offset =
__ATTR(offset, 0644, offset_show, offset_store);
+static ssize_t
+rdev_size_show(mdk_rdev_t *rdev, char *page)
+{
+ return sprintf(page, "%llu\n", (unsigned long long)rdev->size);
+}
+
+static ssize_t
+rdev_size_store(mdk_rdev_t *rdev, const char *buf, size_t len)
+{
+ char *e;
+ unsigned long long size = simple_strtoull(buf, &e, 10);
+ if (e==buf || (*e && *e != '\n'))
+ return -EINVAL;
+ if (rdev->mddev->pers)
+ return -EBUSY;
+ rdev->size = size;
+ if (size < rdev->mddev->size || rdev->mddev->size == 0)
+ rdev->mddev->size = size;
+ return len;
+}
+
+static struct rdev_sysfs_entry rdev_size =
+__ATTR(size, 0644, rdev_size_show, rdev_size_store);
+
static struct attribute *rdev_default_attrs[] = {
&rdev_state.attr,
&rdev_super.attr,
&rdev_errors.attr,
&rdev_slot.attr,
&rdev_offset.attr,
+ &rdev_size.attr,
NULL,
};
static ssize_t
static struct md_sysfs_entry md_chunk_size =
__ATTR(chunk_size, 0644, chunk_size_show, chunk_size_store);
+static ssize_t
+null_show(mddev_t *mddev, char *page)
+{
+ return -EINVAL;
+}
+
+static ssize_t
+new_dev_store(mddev_t *mddev, const char *buf, size_t len)
+{
+ /* buf must be %d:%d\n? giving major and minor numbers */
+ /* The new device is added to the array.
+ * If the array has a persistent superblock, we read the
+ * superblock to initialise info and check validity.
+ * Otherwise, only checking done is that in bind_rdev_to_array,
+ * which mainly checks size.
+ */
+ char *e;
+ int major = simple_strtoul(buf, &e, 10);
+ int minor;
+ dev_t dev;
+ mdk_rdev_t *rdev;
+ int err;
+
+ if (!*buf || *e != ':' || !e[1] || e[1] == '\n')
+ return -EINVAL;
+ minor = simple_strtoul(e+1, &e, 10);
+ if (*e && *e != '\n')
+ return -EINVAL;
+ dev = MKDEV(major, minor);
+ if (major != MAJOR(dev) ||
+ minor != MINOR(dev))
+ return -EOVERFLOW;
+
+
+ if (mddev->persistent) {
+ rdev = md_import_device(dev, mddev->major_version,
+ mddev->minor_version);
+ if (!IS_ERR(rdev) && !list_empty(&mddev->disks)) {
+ mdk_rdev_t *rdev0 = list_entry(mddev->disks.next,
+ mdk_rdev_t, same_set);
+ err = super_types[mddev->major_version]
+ .load_super(rdev, rdev0, mddev->minor_version);
+ if (err < 0)
+ goto out;
+ }
+ } else
+ rdev = md_import_device(dev, -1, -1);
+
+ if (IS_ERR(rdev))
+ return PTR_ERR(rdev);
+ err = bind_rdev_to_array(rdev, mddev);
+ out:
+ if (err)
+ export_rdev(rdev);
+ return err ? err : len;
+}
+
+static struct md_sysfs_entry md_new_device =
+__ATTR(new_dev, 0200, null_show, new_dev_store);
static ssize_t
size_show(mddev_t *mddev, char *page)
static struct md_sysfs_entry
md_mismatches = __ATTR_RO(mismatch_cnt);
+static ssize_t
+sync_min_show(mddev_t *mddev, char *page)
+{
+ return sprintf(page, "%d (%s)\n", speed_min(mddev),
+ mddev->sync_speed_min ? "local": "system");
+}
+
+static ssize_t
+sync_min_store(mddev_t *mddev, const char *buf, size_t len)
+{
+ int min;
+ char *e;
+ if (strncmp(buf, "system", 6)==0) {
+ mddev->sync_speed_min = 0;
+ return len;
+ }
+ min = simple_strtoul(buf, &e, 10);
+ if (buf == e || (*e && *e != '\n') || min <= 0)
+ return -EINVAL;
+ mddev->sync_speed_min = min;
+ return len;
+}
+
+static struct md_sysfs_entry md_sync_min =
+__ATTR(sync_speed_min, S_IRUGO|S_IWUSR, sync_min_show, sync_min_store);
+
+static ssize_t
+sync_max_show(mddev_t *mddev, char *page)
+{
+ return sprintf(page, "%d (%s)\n", speed_max(mddev),
+ mddev->sync_speed_max ? "local": "system");
+}
+
+static ssize_t
+sync_max_store(mddev_t *mddev, const char *buf, size_t len)
+{
+ int max;
+ char *e;
+ if (strncmp(buf, "system", 6)==0) {
+ mddev->sync_speed_max = 0;
+ return len;
+ }
+ max = simple_strtoul(buf, &e, 10);
+ if (buf == e || (*e && *e != '\n') || max <= 0)
+ return -EINVAL;
+ mddev->sync_speed_max = max;
+ return len;
+}
+
+static struct md_sysfs_entry md_sync_max =
+__ATTR(sync_speed_max, S_IRUGO|S_IWUSR, sync_max_show, sync_max_store);
+
+
+static ssize_t
+sync_speed_show(mddev_t *mddev, char *page)
+{
+ unsigned long resync, dt, db;
+ resync = (mddev->curr_resync - atomic_read(&mddev->recovery_active));
+ dt = ((jiffies - mddev->resync_mark) / HZ);
+ if (!dt) dt++;
+ db = resync - (mddev->resync_mark_cnt);
+ return sprintf(page, "%ld\n", db/dt/2); /* K/sec */
+}
+
+static struct md_sysfs_entry
+md_sync_speed = __ATTR_RO(sync_speed);
+
+static ssize_t
+sync_completed_show(mddev_t *mddev, char *page)
+{
+ unsigned long max_blocks, resync;
+
+ if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery))
+ max_blocks = mddev->resync_max_sectors;
+ else
+ max_blocks = mddev->size << 1;
+
+ resync = (mddev->curr_resync - atomic_read(&mddev->recovery_active));
+ return sprintf(page, "%lu / %lu\n", resync, max_blocks);
+}
+
+static struct md_sysfs_entry
+md_sync_completed = __ATTR_RO(sync_completed);
+
static struct attribute *md_default_attrs[] = {
&md_level.attr,
&md_raid_disks.attr,
&md_chunk_size.attr,
&md_size.attr,
&md_metadata.attr,
+ &md_new_device.attr,
NULL,
};
static struct attribute *md_redundancy_attrs[] = {
&md_scan_mode.attr,
&md_mismatches.attr,
+ &md_sync_min.attr,
+ &md_sync_max.attr,
+ &md_sync_speed.attr,
+ &md_sync_completed.attr,
NULL,
};
static struct attribute_group md_redundancy_group = {
set_disk_ro(disk, 1);
}
- bitmap_destroy(mddev);
- if (mddev->bitmap_file) {
- atomic_set(&mddev->bitmap_file->f_dentry->d_inode->i_writecount, 1);
- fput(mddev->bitmap_file);
- mddev->bitmap_file = NULL;
- }
- mddev->bitmap_offset = 0;
-
/*
* Free resources if final stop
*/
struct gendisk *disk;
printk(KERN_INFO "md: %s stopped.\n", mdname(mddev));
+ bitmap_destroy(mddev);
+ if (mddev->bitmap_file) {
+ atomic_set(&mddev->bitmap_file->f_dentry->d_inode->i_writecount, 1);
+ fput(mddev->bitmap_file);
+ mddev->bitmap_file = NULL;
+ }
+ mddev->bitmap_offset = 0;
+
ITERATE_RDEV(mddev,rdev,tmp)
if (rdev->raid_disk >= 0) {
char nm[20];
info.ctime = mddev->ctime;
info.level = mddev->level;
info.size = mddev->size;
+ if (info.size != mddev->size) /* overflow */
+ info.size = -1;
info.nr_disks = nr;
info.raid_disks = mddev->raid_disks;
info.md_minor = mddev->md_minor;
mddev->ctime = get_seconds();
mddev->level = info->level;
+ mddev->clevel[0] = 0;
mddev->size = info->size;
mddev->raid_disks = info->raid_disks;
/* don't set md_minor, it is determined by which /dev/md* was
bdev = bdget_disk(mddev->gendisk, 0);
if (bdev) {
- down(&bdev->bd_inode->i_sem);
- i_size_write(bdev->bd_inode, mddev->array_size << 10);
- up(&bdev->bd_inode->i_sem);
+ mutex_lock(&bdev->bd_inode->i_mutex);
+ i_size_write(bdev->bd_inode, (loff_t)mddev->array_size << 10);
+ mutex_unlock(&bdev->bd_inode->i_mutex);
bdput(bdev);
}
}
if (mddev->sync_thread)
return -EBUSY;
rv = mddev->pers->reshape(mddev, raid_disks);
- if (!rv) {
- struct block_device *bdev;
-
- bdev = bdget_disk(mddev->gendisk, 0);
- if (bdev) {
- down(&bdev->bd_inode->i_sem);
- i_size_write(bdev->bd_inode, mddev->array_size << 10);
- up(&bdev->bd_inode->i_sem);
- bdput(bdev);
- }
- }
return rv;
}
)
return -EINVAL;
/* Check there is only one change */
- if (mddev->size != info->size) cnt++;
+ if (info->size >= 0 && mddev->size != info->size) cnt++;
if (mddev->raid_disks != info->raid_disks) cnt++;
if (mddev->layout != info->layout) cnt++;
if ((state ^ info->state) & (1<<MD_SB_BITMAP_PRESENT)) cnt++;
else
return mddev->pers->reconfig(mddev, info->layout, -1);
}
- if (mddev->size != info->size)
+ if (info->size >= 0 && mddev->size != info->size)
rv = update_size(mddev, info->size);
if (mddev->raid_disks != info->raid_disks)
return 0;
}
+static int md_getgeo(struct block_device *bdev, struct hd_geometry *geo)
+{
+ mddev_t *mddev = bdev->bd_disk->private_data;
+
+ geo->heads = 2;
+ geo->sectors = 4;
+ geo->cylinders = get_capacity(mddev->gendisk) / 8;
+ return 0;
+}
+
static int md_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
int err = 0;
void __user *argp = (void __user *)arg;
- struct hd_geometry __user *loc = argp;
mddev_t *mddev = NULL;
if (!capable(CAP_SYS_ADMIN))
* 4 sectors (with a BIG number of cylinders...). This drives
* dosfs just mad... ;-)
*/
- case HDIO_GETGEO:
- if (!loc) {
- err = -EINVAL;
- goto abort_unlock;
- }
- err = put_user (2, (char __user *) &loc->heads);
- if (err)
- goto abort_unlock;
- err = put_user (4, (char __user *) &loc->sectors);
- if (err)
- goto abort_unlock;
- err = put_user(get_capacity(mddev->gendisk)/8,
- (short __user *) &loc->cylinders);
- if (err)
- goto abort_unlock;
- err = put_user (get_start_sect(inode->i_bdev),
- (long __user *) &loc->start);
- goto done_unlock;
}
/*
.open = md_open,
.release = md_release,
.ioctl = md_ioctl,
+ .getgeo = md_getgeo,
.media_changed = md_media_changed,
.revalidate_disk= md_revalidate,
};
printk(KERN_INFO "md: syncing RAID array %s\n", mdname(mddev));
printk(KERN_INFO "md: minimum _guaranteed_ reconstruction speed:"
- " %d KB/sec/disc.\n", sysctl_speed_limit_min);
+ " %d KB/sec/disc.\n", speed_min(mddev));
printk(KERN_INFO "md: using maximum available idle IO bandwidth "
"(but not more than %d KB/sec) for reconstruction.\n",
- sysctl_speed_limit_max);
+ speed_max(mddev));
is_mddev_idle(mddev); /* this also initializes IO event counters */
/* we don't use the checkpoint if there's a bitmap */
skipped = 0;
sectors = mddev->pers->sync_request(mddev, j, &skipped,
- currspeed < sysctl_speed_limit_min);
+ currspeed < speed_min(mddev));
if (sectors == 0) {
set_bit(MD_RECOVERY_ERR, &mddev->recovery);
goto out;
currspeed = ((unsigned long)(io_sectors-mddev->resync_mark_cnt))/2
/((jiffies-mddev->resync_mark)/HZ +1) +1;
- if (currspeed > sysctl_speed_limit_min) {
- if ((currspeed > sysctl_speed_limit_max) ||
+ if (currspeed > speed_min(mddev)) {
+ if ((currspeed > speed_max(mddev)) ||
!is_mddev_idle(mddev)) {
msleep(500);
goto repeat;
projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blobdiff