unsigned long sectors_reserved = 0;
int err = -EINVAL;
struct page *sb_page;
- int cluster_setup_done = 0;
if (!bitmap->storage.file && !bitmap->mddev->bitmap_info.offset) {
chunksize = 128 * 1024 * 1024;
bitmap->storage.sb_page = sb_page;
re_read:
+ /* If cluster_slot is set, the cluster is setup */
+ if (bitmap->cluster_slot >= 0) {
+ sector_t bm_blocks = bitmap->mddev->resync_max_sectors;
+
+ sector_div(bm_blocks,
+ bitmap->mddev->bitmap_info.chunksize >> 9);
+ /* bits to bytes */
+ bm_blocks = ((bm_blocks+7) >> 3) + sizeof(bitmap_super_t);
+ /* to 4k blocks */
+ bm_blocks = DIV_ROUND_UP_SECTOR_T(bm_blocks, 4096);
+ bitmap->mddev->bitmap_info.offset += bitmap->cluster_slot * (bm_blocks << 3);
+ pr_info("%s:%d bm slot: %d offset: %llu\n", __func__, __LINE__,
+ bitmap->cluster_slot, (unsigned long long)bitmap->mddev->bitmap_info.offset);
+ }
+
if (bitmap->storage.file) {
loff_t isize = i_size_read(bitmap->storage.file->f_mapping->host);
int bytes = isize > PAGE_SIZE ? PAGE_SIZE : isize;
out:
kunmap_atomic(sb);
- if (nodes && !cluster_setup_done) {
- sector_t bm_blocks;
-
- bm_blocks = sector_div(bitmap->mddev->resync_max_sectors, (chunksize >> 9));
- bm_blocks = bm_blocks << 3;
- /* We have bitmap supers at 4k boundaries, hence this
- * is hardcoded */
- bm_blocks = DIV_ROUND_UP(bm_blocks, 4096);
+ /* Assiging chunksize is required for "re_read" */
+ bitmap->mddev->bitmap_info.chunksize = chunksize;
+ if (nodes && (bitmap->cluster_slot < 0)) {
err = md_setup_cluster(bitmap->mddev, nodes);
if (err) {
pr_err("%s: Could not setup cluster service (%d)\n",
goto out_no_sb;
}
bitmap->cluster_slot = md_cluster_ops->slot_number(bitmap->mddev);
- bitmap->mddev->bitmap_info.offset +=
- bitmap->cluster_slot * (bm_blocks << 3);
- pr_info("%s:%d bm slot: %d offset: %llu\n", __func__, __LINE__,
- bitmap->cluster_slot,
- (unsigned long long)bitmap->mddev->bitmap_info.offset);
- cluster_setup_done = 1;
goto re_read;
}
bitmap->mddev->bitmap_info.space = sectors_reserved;
if (err) {
bitmap_print_sb(bitmap);
- if (cluster_setup_done)
+ if (bitmap->cluster_slot < 0)
md_cluster_stop(bitmap->mddev);
}
return err;
}
}
+static int bitmap_file_test_bit(struct bitmap *bitmap, sector_t block)
+{
+ unsigned long bit;
+ struct page *page;
+ void *paddr;
+ unsigned long chunk = block >> bitmap->counts.chunkshift;
+ int set = 0;
+
+ page = filemap_get_page(&bitmap->storage, chunk);
+ if (!page)
+ return -EINVAL;
+ bit = file_page_offset(&bitmap->storage, chunk);
+ paddr = kmap_atomic(page);
+ if (test_bit(BITMAP_HOSTENDIAN, &bitmap->flags))
+ set = test_bit(bit, paddr);
+ else
+ set = test_bit_le(bit, paddr);
+ kunmap_atomic(paddr);
+ return set;
+}
+
+
/* this gets called when the md device is ready to unplug its underlying
* (slave) device queues -- before we let any writes go down, we need to
* sync the dirty pages of the bitmap file to disk */
return;
}
if (!*bmc) {
- *bmc = 2 | (needed ? NEEDED_MASK : 0);
+ *bmc = 2;
bitmap_count_page(&bitmap->counts, offset, 1);
bitmap_set_pending(&bitmap->counts, offset);
bitmap->allclean = 0;
}
+ if (needed)
+ *bmc |= NEEDED_MASK;
spin_unlock_irq(&bitmap->counts.lock);
}
if (!bitmap) /* there was no bitmap */
return;
- if (mddev_is_clustered(bitmap->mddev) && bitmap->mddev->cluster_info)
+ if (mddev_is_clustered(bitmap->mddev) && bitmap->mddev->cluster_info &&
+ bitmap->cluster_slot == md_cluster_ops->slot_number(bitmap->mddev))
md_cluster_stop(bitmap->mddev);
/* Shouldn't be needed - but just in case.... */
* initialize the bitmap structure
* if this returns an error, bitmap_destroy must be called to do clean up
*/
-int bitmap_create(struct mddev *mddev)
+struct bitmap *bitmap_create(struct mddev *mddev, int slot)
{
struct bitmap *bitmap;
sector_t blocks = mddev->resync_max_sectors;
bitmap = kzalloc(sizeof(*bitmap), GFP_KERNEL);
if (!bitmap)
- return -ENOMEM;
+ return ERR_PTR(-ENOMEM);
spin_lock_init(&bitmap->counts.lock);
atomic_set(&bitmap->pending_writes, 0);
init_waitqueue_head(&bitmap->behind_wait);
bitmap->mddev = mddev;
+ bitmap->cluster_slot = slot;
if (mddev->kobj.sd)
bm = sysfs_get_dirent(mddev->kobj.sd, "bitmap");
printk(KERN_INFO "created bitmap (%lu pages) for device %s\n",
bitmap->counts.pages, bmname(bitmap));
- mddev->bitmap = bitmap;
- return test_bit(BITMAP_WRITE_ERROR, &bitmap->flags) ? -EIO : 0;
+ err = test_bit(BITMAP_WRITE_ERROR, &bitmap->flags) ? -EIO : 0;
+ if (err)
+ goto error;
+ return bitmap;
error:
bitmap_free(bitmap);
- return err;
+ return ERR_PTR(err);
}
int bitmap_load(struct mddev *mddev)
}
EXPORT_SYMBOL_GPL(bitmap_load);
+/* Loads the bitmap associated with slot and copies the resync information
+ * to our bitmap
+ */
+int bitmap_copy_from_slot(struct mddev *mddev, int slot,
+ sector_t *low, sector_t *high, bool clear_bits)
+{
+ int rv = 0, i, j;
+ sector_t block, lo = 0, hi = 0;
+ struct bitmap_counts *counts;
+ struct bitmap *bitmap = bitmap_create(mddev, slot);
+
+ if (IS_ERR(bitmap))
+ return PTR_ERR(bitmap);
+
+ rv = bitmap_read_sb(bitmap);
+ if (rv)
+ goto err;
+
+ rv = bitmap_init_from_disk(bitmap, 0);
+ if (rv)
+ goto err;
+
+ counts = &bitmap->counts;
+ for (j = 0; j < counts->chunks; j++) {
+ block = (sector_t)j << counts->chunkshift;
+ if (bitmap_file_test_bit(bitmap, block)) {
+ if (!lo)
+ lo = block;
+ hi = block;
+ bitmap_file_clear_bit(bitmap, block);
+ bitmap_set_memory_bits(mddev->bitmap, block, 1);
+ bitmap_file_set_bit(mddev->bitmap, block);
+ }
+ }
+
+ if (clear_bits) {
+ bitmap_update_sb(bitmap);
+ /* Setting this for the ev_page should be enough.
+ * And we do not require both write_all and PAGE_DIRT either
+ */
+ for (i = 0; i < bitmap->storage.file_pages; i++)
+ set_page_attr(bitmap, i, BITMAP_PAGE_DIRTY);
+ bitmap_write_all(bitmap);
+ bitmap_unplug(bitmap);
+ }
+ *low = lo;
+ *high = hi;
+err:
+ bitmap_free(bitmap);
+ return rv;
+}
+EXPORT_SYMBOL_GPL(bitmap_copy_from_slot);
+
+
void bitmap_status(struct seq_file *seq, struct bitmap *bitmap)
{
unsigned long chunk_kb;
return -EINVAL;
mddev->bitmap_info.offset = offset;
if (mddev->pers) {
+ struct bitmap *bitmap;
mddev->pers->quiesce(mddev, 1);
- rv = bitmap_create(mddev);
- if (!rv)
+ bitmap = bitmap_create(mddev, -1);
+ if (IS_ERR(bitmap))
+ rv = PTR_ERR(bitmap);
+ else {
+ mddev->bitmap = bitmap;
rv = bitmap_load(mddev);
- if (rv) {
- bitmap_destroy(mddev);
- mddev->bitmap_info.offset = 0;
+ if (rv) {
+ bitmap_destroy(mddev);
+ mddev->bitmap_info.offset = 0;
+ }
}
mddev->pers->quiesce(mddev, 0);
if (rv)
projects / deliverable / linux.git / blobdiff