diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/md/bitmap.c | 37 |
1 files changed, 35 insertions, 2 deletions
diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c index 3fe86b54d50b..431da21cb488 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) @@ -1321,7 +1324,7 @@ __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) @@ -2032,6 +2035,36 @@ 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++) { + if (new_bp[k].map) + 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; |