static int test_fiemap(const char *path) {
_cleanup_free_ struct fiemap *fiemap = NULL;
_cleanup_close_ int fd = -1;
int r;
log_info("/* %s */", __func__);
fd = open(path, O_RDONLY | O_CLOEXEC | O_NONBLOCK);
if (fd < 0)
return log_error_errno(errno, "failed to open %s: %m", path);
r = read_fiemap(fd, &fiemap);
if (r == -EOPNOTSUPP)
exit(log_tests_skipped("Not supported"));
if (r < 0)
return log_error_errno(r, "Unable to read extent map for '%s': %m", path);
log_info("extent map information for %s:", path);
log_info("\t start: %" PRIu64, (uint64_t) fiemap->fm_start);
log_info("\t length: %" PRIu64, (uint64_t) fiemap->fm_length);
log_info("\t flags: %" PRIu32, fiemap->fm_flags);
log_info("\t number of mapped extents: %" PRIu32, fiemap->fm_mapped_extents);
log_info("\t extent count: %" PRIu32, fiemap->fm_extent_count);
if (fiemap->fm_extent_count > 0)
log_info("\t first extent location: %" PRIu64,
(uint64_t) (fiemap->fm_extents[0].fe_physical / page_size()));
return 0;
}
static int test_fiemap(const char *path) {
_cleanup_free_ struct fiemap *fiemap = NULL;
_cleanup_close_ int fd = -1;
int r;
fd = open(path, O_RDONLY | O_CLOEXEC | O_NONBLOCK);
if (fd < 0)
return log_error_errno(errno, "failed to open %s: %m", path);
r = read_fiemap(fd, &fiemap);
if (r == -EOPNOTSUPP) {
log_info("Skipping test, not supported");
exit(EXIT_TEST_SKIP);
}
if (r < 0)
return log_error_errno(r, "Unable to read extent map for '%s': %m", path);
log_info("extent map information for %s:", path);
log_info("\t start: %llu", fiemap->fm_start);
log_info("\t length: %llu", fiemap->fm_length);
log_info("\t flags: %u", fiemap->fm_flags);
log_info("\t number of mapped extents: %u", fiemap->fm_mapped_extents);
log_info("\t extent count: %u", fiemap->fm_extent_count);
if (fiemap->fm_extent_count > 0)
log_info("\t first extent location: %llu",
fiemap->fm_extents[0].fe_physical / page_size());
return 0;
}
/*
* Use FIEMAP to determine the extents that make up a file.
* Allocate eblocks_used array based on length of file, and then mark
* the set of eblocks that contain data based on the extents.
* Returns the index of the last occupied eblock.
*/
static long read_extents(FILE *infile)
{
int i;
struct fiemap *fiemap = read_fiemap(fileno(infile));
long ret = 0;
LTC_ARGCHK(fiemap != NULL);
eblocks_used = malloc(eblocks);
LTC_ARGCHK(eblocks_used != 0);
memset(eblocks_used, 0, eblocks);
for (i=0; i < fiemap->fm_mapped_extents; i++)
ret = process_extent(&fiemap->fm_extents[i]);
return ret;
}
