Btrfs: self-tests: Execute page straddling test only when nodesize < PAGE_SIZE
On ppc64, PAGE_SIZE is 64k which is same as BTRFS_MAX_METADATA_BLOCKSIZE.
In such a scenario, we will never be able to have an extent buffer
containing more than one page. Hence in such cases this commit does not
execute the page straddling tests.
Reviewed-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Feifei Xu <xufeifei@linux.vnet.ibm.com>
Signed-off-by: Chandan Rajendra <chandan@linux.vnet.ibm.com>
Signed-off-by: David Sterba <dsterba@suse.com>
diff --git a/fs/btrfs/tests/extent-io-tests.c b/fs/btrfs/tests/extent-io-tests.c
index 755fceb..2794fed 100644
--- a/fs/btrfs/tests/extent-io-tests.c
+++ b/fs/btrfs/tests/extent-io-tests.c
@@ -21,6 +21,7 @@
#include <linux/slab.h>
#include <linux/sizes.h>
#include "btrfs-tests.h"
+#include "../ctree.h"
#include "../extent_io.h"
#define PROCESS_UNLOCK (1 << 0)
@@ -298,25 +299,29 @@
return -EINVAL;
}
- bitmap_set(bitmap, (PAGE_SIZE - sizeof(long) / 2) * BITS_PER_BYTE,
- sizeof(long) * BITS_PER_BYTE);
- extent_buffer_bitmap_set(eb, PAGE_SIZE - sizeof(long) / 2, 0,
- sizeof(long) * BITS_PER_BYTE);
- if (memcmp_extent_buffer(eb, bitmap, 0, len) != 0) {
- test_msg("Setting straddling pages failed\n");
- return -EINVAL;
- }
+ /* Straddling pages test */
+ if (len > PAGE_SIZE) {
+ bitmap_set(bitmap,
+ (PAGE_SIZE - sizeof(long) / 2) * BITS_PER_BYTE,
+ sizeof(long) * BITS_PER_BYTE);
+ extent_buffer_bitmap_set(eb, PAGE_SIZE - sizeof(long) / 2, 0,
+ sizeof(long) * BITS_PER_BYTE);
+ if (memcmp_extent_buffer(eb, bitmap, 0, len) != 0) {
+ test_msg("Setting straddling pages failed\n");
+ return -EINVAL;
+ }
- bitmap_set(bitmap, 0, len * BITS_PER_BYTE);
- bitmap_clear(bitmap,
- (PAGE_SIZE - sizeof(long) / 2) * BITS_PER_BYTE,
- sizeof(long) * BITS_PER_BYTE);
- extent_buffer_bitmap_set(eb, 0, 0, len * BITS_PER_BYTE);
- extent_buffer_bitmap_clear(eb, PAGE_SIZE - sizeof(long) / 2, 0,
- sizeof(long) * BITS_PER_BYTE);
- if (memcmp_extent_buffer(eb, bitmap, 0, len) != 0) {
- test_msg("Clearing straddling pages failed\n");
- return -EINVAL;
+ bitmap_set(bitmap, 0, len * BITS_PER_BYTE);
+ bitmap_clear(bitmap,
+ (PAGE_SIZE - sizeof(long) / 2) * BITS_PER_BYTE,
+ sizeof(long) * BITS_PER_BYTE);
+ extent_buffer_bitmap_set(eb, 0, 0, len * BITS_PER_BYTE);
+ extent_buffer_bitmap_clear(eb, PAGE_SIZE - sizeof(long) / 2, 0,
+ sizeof(long) * BITS_PER_BYTE);
+ if (memcmp_extent_buffer(eb, bitmap, 0, len) != 0) {
+ test_msg("Clearing straddling pages failed\n");
+ return -EINVAL;
+ }
}
/*
@@ -359,7 +364,13 @@
int ret;
test_msg("Running extent buffer bitmap tests\n");
- len = sectorsize * 4;
+
+ /*
+ * In ppc64, sectorsize can be 64K, thus 4 * 64K will be larger than
+ * BTRFS_MAX_METADATA_BLOCKSIZE.
+ */
+ len = (sectorsize < BTRFS_MAX_METADATA_BLOCKSIZE)
+ ? sectorsize * 4 : sectorsize;
bitmap = kmalloc(len, GFP_KERNEL);
if (!bitmap) {