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Get blocksize from the devices if it's not specified

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This commit is contained in:
Kent Overstreet 2013-04-23 17:43:47 -07:00
parent 94755cc757
commit ebb76d0c4a
1 changed files with 30 additions and 1 deletions
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31
make-bcache.c
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@ -21,6 +21,12 @@
#include "bcache.h"
#define max(x, y) ({ \
typeof(x) _max1 = (x); \
typeof(y) _max2 = (y); \
(void) (&_max1 == &_max2); \
_max1 > _max2 ? _max1 : _max2; })
uint64_t getblocks(int fd)
{
uint64_t ret;
@ -246,6 +252,19 @@ static void write_sb(char *dev, unsigned block_size, unsigned bucket_size,
close(fd);
}
static unsigned get_blocksize(const char *path)
{
struct stat statbuf;
if (stat(path, &statbuf)) {
fprintf(stderr, "Error statting %s: %s\n",
path, strerror(errno));
exit(EXIT_FAILURE);
}
return statbuf.st_blksize / 512;
}
int main(int argc, char **argv)
{
int c, bdev = -1;
@ -253,7 +272,7 @@ int main(int argc, char **argv)
char *cache_devices[argc];
char *backing_devices[argc];
unsigned block_size = 1, bucket_size = 1024;
unsigned block_size = 0, bucket_size = 1024;
int writeback = 0, discard = 0;
unsigned cache_replacement_policy = 0;
uint64_t data_offset = BDEV_DATA_START_DEFAULT;
@ -343,6 +362,16 @@ int main(int argc, char **argv)
exit(EXIT_FAILURE);
}
if (!block_size) {
for (i = 0; i < ncache_devices; i++)
block_size = max(block_size,
get_blocksize(cache_devices[i]));
for (i = 0; i < nbacking_devices; i++)
block_size = max(block_size,
get_blocksize(backing_devices[i]));
}
for (i = 0; i < ncache_devices; i++)
write_sb(cache_devices[i], block_size, bucket_size,
writeback, discard, cache_replacement_policy,