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Diffstat (limited to 'drivers/md/bitmap.c')
-rw-r--r--drivers/md/bitmap.c88
1 files changed, 77 insertions, 11 deletions
diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c
index 3fe86b54d50b..d8129ec93ebd 100644
--- a/drivers/md/bitmap.c
+++ b/drivers/md/bitmap.c
@@ -46,7 +46,7 @@ static inline char *bmname(struct bitmap *bitmap)
* allocated while we're using it
*/
static int bitmap_checkpage(struct bitmap_counts *bitmap,
- unsigned long page, int create)
+ unsigned long page, int create, int no_hijack)
__releases(bitmap->lock)
__acquires(bitmap->lock)
{
@@ -90,6 +90,9 @@ __acquires(bitmap->lock)
if (mappage == NULL) {
pr_debug("md/bitmap: map page allocation failed, hijacking\n");
+ /* We don't support hijack for cluster raid */
+ if (no_hijack)
+ return -ENOMEM;
/* failed - set the hijacked flag so that we can use the
* pointer as a counter */
if (!bitmap->bp[page].map)
@@ -756,7 +759,7 @@ static int bitmap_storage_alloc(struct bitmap_storage *store,
bytes += sizeof(bitmap_super_t);
num_pages = DIV_ROUND_UP(bytes, PAGE_SIZE);
- offset = slot_number * (num_pages - 1);
+ offset = slot_number * num_pages;
store->filemap = kmalloc(sizeof(struct page *)
* num_pages, GFP_KERNEL);
@@ -900,6 +903,11 @@ static void bitmap_file_set_bit(struct bitmap *bitmap, sector_t block)
struct page *page;
void *kaddr;
unsigned long chunk = block >> bitmap->counts.chunkshift;
+ struct bitmap_storage *store = &bitmap->storage;
+ unsigned long node_offset = 0;
+
+ if (mddev_is_clustered(bitmap->mddev))
+ node_offset = bitmap->cluster_slot * store->file_pages;
page = filemap_get_page(&bitmap->storage, chunk);
if (!page)
@@ -915,7 +923,7 @@ static void bitmap_file_set_bit(struct bitmap *bitmap, sector_t block)
kunmap_atomic(kaddr);
pr_debug("set file bit %lu page %lu\n", bit, page->index);
/* record page number so it gets flushed to disk when unplug occurs */
- set_page_attr(bitmap, page->index, BITMAP_PAGE_DIRTY);
+ set_page_attr(bitmap, page->index - node_offset, BITMAP_PAGE_DIRTY);
}
static void bitmap_file_clear_bit(struct bitmap *bitmap, sector_t block)
@@ -924,6 +932,11 @@ static void bitmap_file_clear_bit(struct bitmap *bitmap, sector_t block)
struct page *page;
void *paddr;
unsigned long chunk = block >> bitmap->counts.chunkshift;
+ struct bitmap_storage *store = &bitmap->storage;
+ unsigned long node_offset = 0;
+
+ if (mddev_is_clustered(bitmap->mddev))
+ node_offset = bitmap->cluster_slot * store->file_pages;
page = filemap_get_page(&bitmap->storage, chunk);
if (!page)
@@ -935,8 +948,8 @@ static void bitmap_file_clear_bit(struct bitmap *bitmap, sector_t block)
else
clear_bit_le(bit, paddr);
kunmap_atomic(paddr);
- if (!test_page_attr(bitmap, page->index, BITMAP_PAGE_NEEDWRITE)) {
- set_page_attr(bitmap, page->index, BITMAP_PAGE_PENDING);
+ if (!test_page_attr(bitmap, page->index - node_offset, BITMAP_PAGE_NEEDWRITE)) {
+ set_page_attr(bitmap, page->index - node_offset, BITMAP_PAGE_PENDING);
bitmap->allclean = 0;
}
}
@@ -1321,7 +1334,7 @@ __acquires(bitmap->lock)
sector_t csize;
int err;
- err = bitmap_checkpage(bitmap, page, create);
+ err = bitmap_checkpage(bitmap, page, create, 0);
if (bitmap->bp[page].hijacked ||
bitmap->bp[page].map == NULL)
@@ -1594,6 +1607,27 @@ void bitmap_cond_end_sync(struct bitmap *bitmap, sector_t sector, bool force)
}
EXPORT_SYMBOL(bitmap_cond_end_sync);
+void bitmap_sync_with_cluster(struct mddev *mddev,
+ sector_t old_lo, sector_t old_hi,
+ sector_t new_lo, sector_t new_hi)
+{
+ struct bitmap *bitmap = mddev->bitmap;
+ sector_t sector, blocks = 0;
+
+ for (sector = old_lo; sector < new_lo; ) {
+ bitmap_end_sync(bitmap, sector, &blocks, 0);
+ sector += blocks;
+ }
+ WARN((blocks > new_lo) && old_lo, "alignment is not correct for lo\n");
+
+ for (sector = old_hi; sector < new_hi; ) {
+ bitmap_start_sync(bitmap, sector, &blocks, 0);
+ sector += blocks;
+ }
+ WARN((blocks > new_hi) && old_hi, "alignment is not correct for hi\n");
+}
+EXPORT_SYMBOL(bitmap_sync_with_cluster);
+
static void bitmap_set_memory_bits(struct bitmap *bitmap, sector_t offset, int needed)
{
/* For each chunk covered by any of these sectors, set the
@@ -1814,6 +1848,9 @@ int bitmap_load(struct mddev *mddev)
if (!bitmap)
goto out;
+ if (mddev_is_clustered(mddev))
+ md_cluster_ops->load_bitmaps(mddev, mddev->bitmap_info.nodes);
+
/* Clear out old bitmap info first: Either there is none, or we
* are resuming after someone else has possibly changed things,
* so we should forget old cached info.
@@ -1890,14 +1927,14 @@ int bitmap_copy_from_slot(struct mddev *mddev, int slot,
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
- */
+ /* BITMAP_PAGE_PENDING is set, but bitmap_unplug needs
+ * BITMAP_PAGE_DIRTY or _NEEDWRITE to write ... */
for (i = 0; i < bitmap->storage.file_pages; i++)
- set_page_attr(bitmap, i, BITMAP_PAGE_DIRTY);
- bitmap_write_all(bitmap);
+ if (test_page_attr(bitmap, i, BITMAP_PAGE_PENDING))
+ set_page_attr(bitmap, i, BITMAP_PAGE_NEEDWRITE);
bitmap_unplug(bitmap);
}
+ bitmap_unplug(mddev->bitmap);
*low = lo;
*high = hi;
err:
@@ -2032,6 +2069,35 @@ int bitmap_resize(struct bitmap *bitmap, sector_t blocks,
chunks << chunkshift);
spin_lock_irq(&bitmap->counts.lock);
+ /* For cluster raid, need to pre-allocate bitmap */
+ if (mddev_is_clustered(bitmap->mddev)) {
+ unsigned long page;
+ for (page = 0; page < pages; page++) {
+ ret = bitmap_checkpage(&bitmap->counts, page, 1, 1);
+ if (ret) {
+ unsigned long k;
+
+ /* deallocate the page memory */
+ for (k = 0; k < page; k++) {
+ kfree(new_bp[k].map);
+ }
+
+ /* restore some fields from old_counts */
+ bitmap->counts.bp = old_counts.bp;
+ bitmap->counts.pages = old_counts.pages;
+ bitmap->counts.missing_pages = old_counts.pages;
+ bitmap->counts.chunkshift = old_counts.chunkshift;
+ bitmap->counts.chunks = old_counts.chunks;
+ bitmap->mddev->bitmap_info.chunksize = 1 << (old_counts.chunkshift +
+ BITMAP_BLOCK_SHIFT);
+ blocks = old_counts.chunks << old_counts.chunkshift;
+ pr_err("Could not pre-allocate in-memory bitmap for cluster raid\n");
+ break;
+ } else
+ bitmap->counts.bp[page].count += 1;
+ }
+ }
+
for (block = 0; block < blocks; ) {
bitmap_counter_t *bmc_old, *bmc_new;
int set;
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