}
}
-/*
- * The extent buffer bitmap operations are done with byte granularity because
- * bitmap items are not guaranteed to be aligned to a word and therefore a
- * single word in a bitmap may straddle two pages in the extent buffer.
- */
-#define BIT_BYTE(nr) ((nr) / BITS_PER_BYTE)
-#define BYTE_MASK ((1 << BITS_PER_BYTE) - 1)
-#define BITMAP_FIRST_BYTE_MASK(start) \
- ((BYTE_MASK << ((start) & (BITS_PER_BYTE - 1))) & BYTE_MASK)
-#define BITMAP_LAST_BYTE_MASK(nbits) \
- (BYTE_MASK >> (-(nbits) & (BITS_PER_BYTE - 1)))
+void le_bitmap_set(u8 *map, unsigned int start, int len)
+{
+ u8 *p = map + BIT_BYTE(start);
+ const unsigned int size = start + len;
+ int bits_to_set = BITS_PER_BYTE - (start % BITS_PER_BYTE);
+ u8 mask_to_set = BITMAP_FIRST_BYTE_MASK(start);
+
+ while (len - bits_to_set >= 0) {
+ *p |= mask_to_set;
+ len -= bits_to_set;
+ bits_to_set = BITS_PER_BYTE;
+ mask_to_set = ~(u8)0;
+ p++;
+ }
+ if (len) {
+ mask_to_set &= BITMAP_LAST_BYTE_MASK(size);
+ *p |= mask_to_set;
+ }
+}
+
+void le_bitmap_clear(u8 *map, unsigned int start, int len)
+{
+ u8 *p = map + BIT_BYTE(start);
+ const unsigned int size = start + len;
+ int bits_to_clear = BITS_PER_BYTE - (start % BITS_PER_BYTE);
+ u8 mask_to_clear = BITMAP_FIRST_BYTE_MASK(start);
+
+ while (len - bits_to_clear >= 0) {
+ *p &= ~mask_to_clear;
+ len -= bits_to_clear;
+ bits_to_clear = BITS_PER_BYTE;
+ mask_to_clear = ~(u8)0;
+ p++;
+ }
+ if (len) {
+ mask_to_clear &= BITMAP_LAST_BYTE_MASK(size);
+ *p &= ~mask_to_clear;
+ }
+}
/*
* eb_bitmap_offset() - calculate the page and offset of the byte containing the
int extent_buffer_test_bit(struct extent_buffer *eb, unsigned long start,
unsigned long nr)
{
- char *kaddr;
+ u8 *kaddr;
struct page *page;
unsigned long i;
size_t offset;
void extent_buffer_bitmap_set(struct extent_buffer *eb, unsigned long start,
unsigned long pos, unsigned long len)
{
- char *kaddr;
+ u8 *kaddr;
struct page *page;
unsigned long i;
size_t offset;
const unsigned int size = pos + len;
int bits_to_set = BITS_PER_BYTE - (pos % BITS_PER_BYTE);
- unsigned int mask_to_set = BITMAP_FIRST_BYTE_MASK(pos);
+ u8 mask_to_set = BITMAP_FIRST_BYTE_MASK(pos);
eb_bitmap_offset(eb, start, pos, &i, &offset);
page = eb->pages[i];
kaddr[offset] |= mask_to_set;
len -= bits_to_set;
bits_to_set = BITS_PER_BYTE;
- mask_to_set = ~0U;
+ mask_to_set = ~(u8)0;
if (++offset >= PAGE_SIZE && len > 0) {
offset = 0;
page = eb->pages[++i];
void extent_buffer_bitmap_clear(struct extent_buffer *eb, unsigned long start,
unsigned long pos, unsigned long len)
{
- char *kaddr;
+ u8 *kaddr;
struct page *page;
unsigned long i;
size_t offset;
const unsigned int size = pos + len;
int bits_to_clear = BITS_PER_BYTE - (pos % BITS_PER_BYTE);
- unsigned int mask_to_clear = BITMAP_FIRST_BYTE_MASK(pos);
+ u8 mask_to_clear = BITMAP_FIRST_BYTE_MASK(pos);
eb_bitmap_offset(eb, start, pos, &i, &offset);
page = eb->pages[i];
kaddr[offset] &= ~mask_to_clear;
len -= bits_to_clear;
bits_to_clear = BITS_PER_BYTE;
- mask_to_clear = ~0U;
+ mask_to_clear = ~(u8)0;
if (++offset >= PAGE_SIZE && len > 0) {
offset = 0;
page = eb->pages[++i];
return ret;
}
-/**
- * test_bit_in_byte - Determine whether a bit is set in a byte
- * @nr: bit number to test
- * @addr: Address to start counting from
- */
-static inline int test_bit_in_byte(int nr, const u8 *addr)
+static int check_eb_bitmap(unsigned long *bitmap, struct extent_buffer *eb,
+ unsigned long len)
{
- return 1UL & (addr[nr / BITS_PER_BYTE] >> (nr & (BITS_PER_BYTE - 1)));
+ unsigned long i;
+
+ for (i = 0; i < len * BITS_PER_BYTE; i++) {
+ int bit, bit1;
+
+ bit = !!test_bit(i, bitmap);
+ bit1 = !!extent_buffer_test_bit(eb, 0, i);
+ if (bit1 != bit) {
+ test_msg("Bits do not match\n");
+ return -EINVAL;
+ }
+
+ bit1 = !!extent_buffer_test_bit(eb, i / BITS_PER_BYTE,
+ i % BITS_PER_BYTE);
+ if (bit1 != bit) {
+ test_msg("Offset bits do not match\n");
+ return -EINVAL;
+ }
+ }
+ return 0;
}
static int __test_eb_bitmaps(unsigned long *bitmap, struct extent_buffer *eb,
unsigned long len)
{
- unsigned long i, x;
+ unsigned long i, j;
+ u32 x;
+ int ret;
memset(bitmap, 0, len);
memset_extent_buffer(eb, 0, 0, len);
bitmap_set(bitmap, 0, len * BITS_PER_BYTE);
extent_buffer_bitmap_set(eb, 0, 0, len * BITS_PER_BYTE);
- if (memcmp_extent_buffer(eb, bitmap, 0, len) != 0) {
+ ret = check_eb_bitmap(bitmap, eb, len);
+ if (ret) {
test_msg("Setting all bits failed\n");
- return -EINVAL;
+ return ret;
}
bitmap_clear(bitmap, 0, len * BITS_PER_BYTE);
extent_buffer_bitmap_clear(eb, 0, 0, len * BITS_PER_BYTE);
- if (memcmp_extent_buffer(eb, bitmap, 0, len) != 0) {
+ ret = check_eb_bitmap(bitmap, eb, len);
+ if (ret) {
test_msg("Clearing all bits failed\n");
- return -EINVAL;
+ return ret;
}
/* Straddling pages test */
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) {
+ ret = check_eb_bitmap(bitmap, eb, len);
+ if (ret) {
test_msg("Setting straddling pages failed\n");
- return -EINVAL;
+ return ret;
}
bitmap_set(bitmap, 0, len * 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) {
+ ret = check_eb_bitmap(bitmap, eb, len);
+ if (ret) {
test_msg("Clearing straddling pages failed\n");
- return -EINVAL;
+ return ret;
}
}
* something repetitive that could miss some hypothetical off-by-n bug.
*/
x = 0;
- for (i = 0; i < len / sizeof(long); i++) {
- x = (0x19660dULL * (u64)x + 0x3c6ef35fULL) & 0xffffffffUL;
- bitmap[i] = x;
- }
- write_extent_buffer(eb, bitmap, 0, len);
-
- for (i = 0; i < len * BITS_PER_BYTE; i++) {
- int bit, bit1;
-
- bit = !!test_bit_in_byte(i, (u8 *)bitmap);
- bit1 = !!extent_buffer_test_bit(eb, 0, i);
- if (bit1 != bit) {
- test_msg("Testing bit pattern failed\n");
- return -EINVAL;
+ bitmap_clear(bitmap, 0, len * BITS_PER_BYTE);
+ extent_buffer_bitmap_clear(eb, 0, 0, len * BITS_PER_BYTE);
+ for (i = 0; i < len * BITS_PER_BYTE / 32; i++) {
+ x = (0x19660dULL * (u64)x + 0x3c6ef35fULL) & 0xffffffffU;
+ for (j = 0; j < 32; j++) {
+ if (x & (1U << j)) {
+ bitmap_set(bitmap, i * 32 + j, 1);
+ extent_buffer_bitmap_set(eb, 0, i * 32 + j, 1);
+ }
}
+ }
- bit1 = !!extent_buffer_test_bit(eb, i / BITS_PER_BYTE,
- i % BITS_PER_BYTE);
- if (bit1 != bit) {
- test_msg("Testing bit pattern with offset failed\n");
- return -EINVAL;
- }
+ ret = check_eb_bitmap(bitmap, eb, len);
+ if (ret) {
+ test_msg("Random bit pattern failed\n");
+ return ret;
}
return 0;
#include "../transaction.h"
struct free_space_extent {
- u64 start, length;
+ u64 start;
+ u64 length;
};
-/*
- * The test cases align their operations to this in order to hit some of the
- * edge cases in the bitmap code.
- */
-#define BITMAP_RANGE (BTRFS_FREE_SPACE_BITMAP_BITS * PAGE_SIZE)
-
static int __check_free_space_extents(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info,
struct btrfs_block_group_cache *cache,
struct btrfs_path *path,
- struct free_space_extent *extents,
+ const struct free_space_extent * const extents,
unsigned int num_extents)
{
struct btrfs_free_space_info *info;
struct btrfs_fs_info *fs_info,
struct btrfs_block_group_cache *cache,
struct btrfs_path *path,
- struct free_space_extent *extents,
+ const struct free_space_extent * const extents,
unsigned int num_extents)
{
struct btrfs_free_space_info *info;
static int test_empty_block_group(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info,
struct btrfs_block_group_cache *cache,
- struct btrfs_path *path)
+ struct btrfs_path *path,
+ u32 alignment)
{
- struct free_space_extent extents[] = {
+ const struct free_space_extent extents[] = {
{cache->key.objectid, cache->key.offset},
};
static int test_remove_all(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info,
struct btrfs_block_group_cache *cache,
- struct btrfs_path *path)
+ struct btrfs_path *path,
+ u32 alignment)
{
- struct free_space_extent extents[] = {};
+ const struct free_space_extent extents[] = {};
int ret;
ret = __remove_from_free_space_tree(trans, fs_info, cache, path,
static int test_remove_beginning(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info,
struct btrfs_block_group_cache *cache,
- struct btrfs_path *path)
+ struct btrfs_path *path,
+ u32 alignment)
{
- struct free_space_extent extents[] = {
- {cache->key.objectid + BITMAP_RANGE,
- cache->key.offset - BITMAP_RANGE},
+ const struct free_space_extent extents[] = {
+ {cache->key.objectid + alignment,
+ cache->key.offset - alignment},
};
int ret;
ret = __remove_from_free_space_tree(trans, fs_info, cache, path,
- cache->key.objectid, BITMAP_RANGE);
+ cache->key.objectid, alignment);
if (ret) {
test_msg("Could not remove free space\n");
return ret;
static int test_remove_end(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info,
struct btrfs_block_group_cache *cache,
- struct btrfs_path *path)
+ struct btrfs_path *path,
+ u32 alignment)
{
- struct free_space_extent extents[] = {
- {cache->key.objectid, cache->key.offset - BITMAP_RANGE},
+ const struct free_space_extent extents[] = {
+ {cache->key.objectid, cache->key.offset - alignment},
};
int ret;
ret = __remove_from_free_space_tree(trans, fs_info, cache, path,
cache->key.objectid +
- cache->key.offset - BITMAP_RANGE,
- BITMAP_RANGE);
+ cache->key.offset - alignment,
+ alignment);
if (ret) {
test_msg("Could not remove free space\n");
return ret;
static int test_remove_middle(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info,
struct btrfs_block_group_cache *cache,
- struct btrfs_path *path)
+ struct btrfs_path *path,
+ u32 alignment)
{
- struct free_space_extent extents[] = {
- {cache->key.objectid, BITMAP_RANGE},
- {cache->key.objectid + 2 * BITMAP_RANGE,
- cache->key.offset - 2 * BITMAP_RANGE},
+ const struct free_space_extent extents[] = {
+ {cache->key.objectid, alignment},
+ {cache->key.objectid + 2 * alignment,
+ cache->key.offset - 2 * alignment},
};
int ret;
ret = __remove_from_free_space_tree(trans, fs_info, cache, path,
- cache->key.objectid + BITMAP_RANGE,
- BITMAP_RANGE);
+ cache->key.objectid + alignment,
+ alignment);
if (ret) {
test_msg("Could not remove free space\n");
return ret;
static int test_merge_left(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info,
struct btrfs_block_group_cache *cache,
- struct btrfs_path *path)
+ struct btrfs_path *path,
+ u32 alignment)
{
- struct free_space_extent extents[] = {
- {cache->key.objectid, 2 * BITMAP_RANGE},
+ const struct free_space_extent extents[] = {
+ {cache->key.objectid, 2 * alignment},
};
int ret;
}
ret = __add_to_free_space_tree(trans, fs_info, cache, path,
- cache->key.objectid, BITMAP_RANGE);
+ cache->key.objectid, alignment);
if (ret) {
test_msg("Could not add free space\n");
return ret;
}
ret = __add_to_free_space_tree(trans, fs_info, cache, path,
- cache->key.objectid + BITMAP_RANGE,
- BITMAP_RANGE);
+ cache->key.objectid + alignment,
+ alignment);
if (ret) {
test_msg("Could not add free space\n");
return ret;
static int test_merge_right(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info,
struct btrfs_block_group_cache *cache,
- struct btrfs_path *path)
+ struct btrfs_path *path,
+ u32 alignment)
{
- struct free_space_extent extents[] = {
- {cache->key.objectid + BITMAP_RANGE, 2 * BITMAP_RANGE},
+ const struct free_space_extent extents[] = {
+ {cache->key.objectid + alignment, 2 * alignment},
};
int ret;
}
ret = __add_to_free_space_tree(trans, fs_info, cache, path,
- cache->key.objectid + 2 * BITMAP_RANGE,
- BITMAP_RANGE);
+ cache->key.objectid + 2 * alignment,
+ alignment);
if (ret) {
test_msg("Could not add free space\n");
return ret;
}
ret = __add_to_free_space_tree(trans, fs_info, cache, path,
- cache->key.objectid + BITMAP_RANGE,
- BITMAP_RANGE);
+ cache->key.objectid + alignment,
+ alignment);
if (ret) {
test_msg("Could not add free space\n");
return ret;
static int test_merge_both(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info,
struct btrfs_block_group_cache *cache,
- struct btrfs_path *path)
+ struct btrfs_path *path,
+ u32 alignment)
{
- struct free_space_extent extents[] = {
- {cache->key.objectid, 3 * BITMAP_RANGE},
+ const struct free_space_extent extents[] = {
+ {cache->key.objectid, 3 * alignment},
};
int ret;
}
ret = __add_to_free_space_tree(trans, fs_info, cache, path,
- cache->key.objectid, BITMAP_RANGE);
+ cache->key.objectid, alignment);
if (ret) {
test_msg("Could not add free space\n");
return ret;
}
ret = __add_to_free_space_tree(trans, fs_info, cache, path,
- cache->key.objectid + 2 * BITMAP_RANGE,
- BITMAP_RANGE);
+ cache->key.objectid + 2 * alignment,
+ alignment);
if (ret) {
test_msg("Could not add free space\n");
return ret;
}
ret = __add_to_free_space_tree(trans, fs_info, cache, path,
- cache->key.objectid + BITMAP_RANGE,
- BITMAP_RANGE);
+ cache->key.objectid + alignment,
+ alignment);
if (ret) {
test_msg("Could not add free space\n");
return ret;
static int test_merge_none(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info,
struct btrfs_block_group_cache *cache,
- struct btrfs_path *path)
+ struct btrfs_path *path,
+ u32 alignment)
{
- struct free_space_extent extents[] = {
- {cache->key.objectid, BITMAP_RANGE},
- {cache->key.objectid + 2 * BITMAP_RANGE, BITMAP_RANGE},
- {cache->key.objectid + 4 * BITMAP_RANGE, BITMAP_RANGE},
+ const struct free_space_extent extents[] = {
+ {cache->key.objectid, alignment},
+ {cache->key.objectid + 2 * alignment, alignment},
+ {cache->key.objectid + 4 * alignment, alignment},
};
int ret;
}
ret = __add_to_free_space_tree(trans, fs_info, cache, path,
- cache->key.objectid, BITMAP_RANGE);
+ cache->key.objectid, alignment);
if (ret) {
test_msg("Could not add free space\n");
return ret;
}
ret = __add_to_free_space_tree(trans, fs_info, cache, path,
- cache->key.objectid + 4 * BITMAP_RANGE,
- BITMAP_RANGE);
+ cache->key.objectid + 4 * alignment,
+ alignment);
if (ret) {
test_msg("Could not add free space\n");
return ret;
}
ret = __add_to_free_space_tree(trans, fs_info, cache, path,
- cache->key.objectid + 2 * BITMAP_RANGE,
- BITMAP_RANGE);
+ cache->key.objectid + 2 * alignment,
+ alignment);
if (ret) {
test_msg("Could not add free space\n");
return ret;
typedef int (*test_func_t)(struct btrfs_trans_handle *,
struct btrfs_fs_info *,
struct btrfs_block_group_cache *,
- struct btrfs_path *);
+ struct btrfs_path *,
+ u32 alignment);
-static int run_test(test_func_t test_func, int bitmaps,
- u32 sectorsize, u32 nodesize)
+static int run_test(test_func_t test_func, int bitmaps, u32 sectorsize,
+ u32 nodesize, u32 alignment)
{
struct btrfs_fs_info *fs_info;
struct btrfs_root *root = NULL;
btrfs_set_header_nritems(root->node, 0);
root->alloc_bytenr += 2 * nodesize;
- cache = btrfs_alloc_dummy_block_group(8 * BITMAP_RANGE, sectorsize);
+ cache = btrfs_alloc_dummy_block_group(8 * alignment, sectorsize);
if (!cache) {
test_msg("Couldn't allocate dummy block group cache\n");
ret = -ENOMEM;
}
}
- ret = test_func(&trans, root->fs_info, cache, path);
+ ret = test_func(&trans, root->fs_info, cache, path, alignment);
if (ret)
goto out;
return ret;
}
-static int run_test_both_formats(test_func_t test_func,
- u32 sectorsize, u32 nodesize)
+static int run_test_both_formats(test_func_t test_func, u32 sectorsize,
+ u32 nodesize, u32 alignment)
{
+ int test_ret = 0;
int ret;
- ret = run_test(test_func, 0, sectorsize, nodesize);
- if (ret)
- return ret;
- return run_test(test_func, 1, sectorsize, nodesize);
+ ret = run_test(test_func, 0, sectorsize, nodesize, alignment);
+ if (ret) {
+ test_msg("%pf failed with extents, sectorsize=%u, nodesize=%u, alignment=%u\n",
+ test_func, sectorsize, nodesize, alignment);
+ test_ret = ret;
+ }
+
+ ret = run_test(test_func, 1, sectorsize, nodesize, alignment);
+ if (ret) {
+ test_msg("%pf failed with bitmaps, sectorsize=%u, nodesize=%u, alignment=%u\n",
+ test_func, sectorsize, nodesize, alignment);
+ test_ret = ret;
+ }
+
+ return test_ret;
}
int btrfs_test_free_space_tree(u32 sectorsize, u32 nodesize)
test_merge_both,
test_merge_none,
};
+ u32 bitmap_alignment;
+ int test_ret = 0;
int i;
+ /*
+ * Align some operations to a page to flush out bugs in the extent
+ * buffer bitmap handling of highmem.
+ */
+ bitmap_alignment = BTRFS_FREE_SPACE_BITMAP_BITS * PAGE_SIZE;
+
test_msg("Running free space tree tests\n");
for (i = 0; i < ARRAY_SIZE(tests); i++) {
- int ret = run_test_both_formats(tests[i], sectorsize,
- nodesize);
- if (ret) {
- test_msg("%pf : sectorsize %u failed\n",
- tests[i], sectorsize);
- return ret;
- }
+ int ret;
+
+ ret = run_test_both_formats(tests[i], sectorsize, nodesize,
+ sectorsize);
+ if (ret)
+ test_ret = ret;
+
+ ret = run_test_both_formats(tests[i], sectorsize, nodesize,
+ bitmap_alignment);
+ if (ret)
+ test_ret = ret;
}
- return 0;
+ return test_ret;
}
projects / cascardo / linux.git / commitdiff