Commit ed9e4afd authored by Feifei Xu's avatar Feifei Xu Committed by David Sterba
Browse files

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: default avatarJosef Bacik <jbacik@fb.com>
Signed-off-by: default avatarFeifei Xu <xufeifei@linux.vnet.ibm.com>
Signed-off-by: default avatarChandan Rajendra <chandan@linux.vnet.ibm.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent b9ef22de
......@@ -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)
......@@ -298,7 +299,10 @@ static int __test_eb_bitmaps(unsigned long *bitmap, struct extent_buffer *eb,
return -EINVAL;
}
bitmap_set(bitmap, (PAGE_SIZE - sizeof(long) / 2) * BITS_PER_BYTE,
/* 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);
......@@ -318,6 +322,7 @@ static int __test_eb_bitmaps(unsigned long *bitmap, struct extent_buffer *eb,
test_msg("Clearing straddling pages failed\n");
return -EINVAL;
}
}
/*
* Generate a wonky pseudo-random bit pattern for the sake of not using
......@@ -359,7 +364,13 @@ static int test_eb_bitmaps(u32 sectorsize, u32 nodesize)
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) {
......
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