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tests: add helper for creating arbitrary linear mapping.

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This commit is contained in:
Ondrej Kozina
2024-01-05 14:07:24 +01:00
parent bd0768a42a
commit adc83f6dca
2 changed files with 23 additions and 7 deletions
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2
tests/api_test.h
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@@ -45,6 +45,8 @@ int t_set_readahead(const char *device, unsigned value);
int fips_mode(void); int fips_mode(void);
int create_dmdevice_over_device(const char *dm_name, const char *device, uint64_t size, uint64_t offset);
int create_dmdevice_over_loop(const char *dm_name, const uint64_t size); int create_dmdevice_over_loop(const char *dm_name, const uint64_t size);
int get_key_dm(const char *name, char *buffer, unsigned int buffer_size); int get_key_dm(const char *name, char *buffer, unsigned int buffer_size);

28
tests/test_utils.c
View File

@@ -200,26 +200,40 @@ int fips_mode(void)
* size of the loop device or not * size of the loop device or not
*/ */
int create_dmdevice_over_loop(const char *dm_name, const uint64_t size) int create_dmdevice_over_loop(const char *dm_name, const uint64_t size)
{
int r;
r = create_dmdevice_over_device(dm_name, THE_LOOP_DEV, size, t_dev_offset);
if (r != 0)
return r;
t_dev_offset += size;
return r;
}
/*
* Creates dm-linear target over the desired block device.
*/
int create_dmdevice_over_device(const char *dm_name, const char *device, uint64_t size, uint64_t offset)
{ {
char cmd[128]; char cmd[128];
int r; int r;
uint64_t r_size; uint64_t r_size;
if (t_device_size(THE_LOOP_DEV, &r_size) < 0 || r_size <= t_dev_offset || !size) if (!device || t_device_size(device, &r_size) < 0 || r_size <= offset || !size)
return -1; return -1;
if ((r_size - t_dev_offset) < size) { if ((r_size - offset) < size) {
printf("No enough space on backing loop device\n."); printf("No enough space on device %s\n.", device);
return -2; return -2;
} }
r = snprintf(cmd, sizeof(cmd), r = snprintf(cmd, sizeof(cmd),
"dmsetup create %s --table \"0 %" PRIu64 " linear %s %" PRIu64 "\"", "dmsetup create %s --table \"0 %" PRIu64 " linear %s %" PRIu64 "\"",
dm_name, size, THE_LOOP_DEV, t_dev_offset); dm_name, size, device, offset);
if (r < 0 || (size_t)r >= sizeof(cmd)) if (r < 0 || (size_t)r >= sizeof(cmd))
return -3; return -3;
if (!(r = _system(cmd, 1))) return _system(cmd, 1);
t_dev_offset += size;
return r;
} }
__attribute__((format(printf, 3, 4))) __attribute__((format(printf, 3, 4)))