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Extract function to generate zeroes and expose xor function 

Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
Robert Buchholz 2012-07-09 17:22:38 +10:00 committed by NeilBrown
parent 1d9976430c
commit 59679536c5
1 changed files with 13 additions and 8 deletions
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21
restripe.c
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@ -211,7 +211,7 @@ static int is_ddf(int layout)
}
static void xor_blocks(char *target, char **sources, int disks, int size)
void xor_blocks(char *target, char **sources, int disks, int size)
{
int i, j;
/* Amazingly inefficient... */
@ -335,6 +335,17 @@ void make_tables(void)
uint8_t *zero;
int zero_size;
void ensure_zero_has_size(int chunk_size)
{
if (zero == NULL || chunk_size > zero_size) {
if (zero)
free(zero);
zero = xcalloc(1, chunk_size);
zero_size = chunk_size;
}
}
/* Following was taken from linux/drivers/md/raid6recov.c */
/* Recover two failed data blocks. */
@ -510,13 +521,7 @@ int save_stripes(int *source, unsigned long long *offsets,
if (!tables_ready)
make_tables();
if (zero == NULL || chunk_size > zero_size) {
if (zero)
free(zero);
zero = xcalloc(1, chunk_size);
zero_size = chunk_size;
}
ensure_zero_has_size(chunk_size);
len = data_disks * chunk_size;
length_test = length / len;