static int _dm_simple(int task, int wait, const char *name)
{
struct dm_task *dmt;
uint32_t cookie = 0;
int rc;
if (!(dmt = dm_task_create(task)))
return -1;
if (!dm_task_set_name(dmt, name))
goto out;
if (wait && !dm_task_set_cookie(dmt, &cookie, 0))
goto out;
rc = dm_task_run(dmt);
if (wait)
(void) dm_udev_wait(cookie);
dm_task_destroy(dmt);
return rc ? 0 : -1;
out:
dm_task_destroy(dmt);
return -1;
}
/* DM helpers */
static int _dm_simple(int task, const char *name, int udev_wait)
{
int r = 0;
struct dm_task *dmt;
uint32_t cookie = 0;
if (!_dm_use_udev())
udev_wait = 0;
if (!(dmt = dm_task_create(task)))
return 0;
if (name && !dm_task_set_name(dmt, name))
goto out;
if (udev_wait && !dm_task_set_cookie(dmt, &cookie, 0))
goto out;
r = dm_task_run(dmt);
if (udev_wait)
(void)dm_udev_wait(cookie);
out:
dm_task_destroy(dmt);
return r;
}
int dm_addmap(int task, const char *name, const char *target,
const char *params, uint64_t size, int ro, const char *uuid,
int part, mode_t mode, uid_t uid, gid_t gid)
{
int r = 0;
struct dm_task *dmt;
char *prefixed_uuid = NULL;
#ifdef LIBDM_API_COOKIE
uint32_t cookie = 0;
uint16_t udev_flags = 0;
#endif
if (!(dmt = dm_task_create (task)))
return 0;
if (!dm_task_set_name (dmt, name))
goto addout;
if (!dm_task_add_target (dmt, 0, size, target, params))
goto addout;
if (ro && !dm_task_set_ro (dmt))
goto addout;
if (task == DM_DEVICE_CREATE && uuid) {
prefixed_uuid = make_prefixed_uuid(part, uuid);
if (prefixed_uuid == NULL)
goto addout;
if (!dm_task_set_uuid(dmt, prefixed_uuid))
goto addout;
}
if (!dm_task_set_mode(dmt, mode))
goto addout;
if (!dm_task_set_uid(dmt, uid))
goto addout;
if (!dm_task_set_gid(dmt, gid))
goto addout;
dm_task_no_open_count(dmt);
#ifdef LIBDM_API_COOKIE
if (!udev_sync)
udev_flags = DM_UDEV_DISABLE_LIBRARY_FALLBACK;
if (task == DM_DEVICE_CREATE &&
!dm_task_set_cookie(dmt, &cookie, udev_flags))
goto addout;
#endif
r = dm_task_run (dmt);
#ifdef LIBDM_API_COOKIE
if (task == DM_DEVICE_CREATE)
dm_udev_wait(cookie);
#endif
addout:
dm_task_destroy (dmt);
free(prefixed_uuid);
return r;
}
static int _dm_create(int task, int wait,
const char *name, const char *uuid,
uint64_t start, uint64_t length,
const char *target, const char *table,
struct era_dm_info *info)
{
struct dm_task *dmt;
uint32_t cookie = 0;
int rc;
if (!(dmt = dm_task_create(task)))
return -1;
if (!dm_task_set_name(dmt, name))
goto out;
if (uuid && !dm_task_set_uuid(dmt, uuid))
goto out;
if (target && !dm_task_add_target(dmt, start, length, target, table))
goto out;
if (wait && !dm_task_set_cookie(dmt, &cookie, 0))
goto out;
rc = dm_task_run(dmt);
if (wait)
(void) dm_udev_wait(cookie);
if (rc && info)
{
struct dm_info dmi;
if (!dm_task_get_info(dmt, &dmi))
goto out;
info->target_count = dmi.target_count;
info->open_count = dmi.open_count;
info->suspended = dmi.suspended;
info->exists = dmi.exists;
info->major = dmi.major;
info->minor = dmi.minor;
}
dm_task_destroy(dmt);
return rc ? 0 : -1;
out:
dm_task_destroy(dmt);
return -1;
}
int dm_simplecmd(int task, const char *name, int no_flush, uint16_t udev_flags)
{
int r = 0;
int udev_wait_flag = (task == DM_DEVICE_RESUME ||
task == DM_DEVICE_REMOVE);
#ifdef LIBDM_API_COOKIE
uint32_t cookie = 0;
#endif
struct dm_task *dmt;
if (!(dmt = dm_task_create(task)))
return 0;
if (!dm_task_set_name(dmt, name))
goto out;
dm_task_no_open_count(dmt);
dm_task_skip_lockfs(dmt);
if (no_flush)
dm_task_no_flush(dmt);
#ifdef LIBDM_API_COOKIE
if (!udev_sync)
udev_flags |= DM_UDEV_DISABLE_LIBRARY_FALLBACK;
if (udev_wait_flag && !dm_task_set_cookie(dmt, &cookie, udev_flags))
goto out;
#endif
r = dm_task_run(dmt);
#ifdef LIBDM_API_COOKIE
if (udev_wait_flag)
dm_udev_wait(cookie);
#endif
out:
dm_task_destroy(dmt);
return r;
}
static int
dm_simplecmd (int task, const char *name, int no_flush, int need_sync, uint16_t udev_flags, int deferred_remove) {
int r = 0;
int udev_wait_flag = (need_sync && (task == DM_DEVICE_RESUME ||
task == DM_DEVICE_REMOVE));
uint32_t cookie = 0;
struct dm_task *dmt;
if (!(dmt = dm_task_create (task)))
return 0;
if (!dm_task_set_name (dmt, name))
goto out;
dm_task_no_open_count(dmt);
dm_task_skip_lockfs(dmt); /* for DM_DEVICE_RESUME */
#ifdef LIBDM_API_FLUSH
if (no_flush)
dm_task_no_flush(dmt); /* for DM_DEVICE_SUSPEND/RESUME */
#endif
#ifdef LIBDM_API_DEFERRED
if (do_deferred(deferred_remove))
dm_task_deferred_remove(dmt);
#endif
if (udev_wait_flag &&
!dm_task_set_cookie(dmt, &cookie,
DM_UDEV_DISABLE_LIBRARY_FALLBACK | udev_flags))
goto out;
r = dm_task_run (dmt);
if (udev_wait_flag)
dm_udev_wait(cookie);
out:
dm_task_destroy (dmt);
return r;
}
static int
dm_addmap (int task, const char *target, struct multipath *mpp,
char * params, int ro) {
int r = 0;
struct dm_task *dmt;
char *prefixed_uuid = NULL;
uint32_t cookie = 0;
if (!(dmt = dm_task_create (task)))
return 0;
if (!dm_task_set_name (dmt, mpp->alias))
goto addout;
if (!dm_task_add_target (dmt, 0, mpp->size, target, params))
goto addout;
if (ro)
dm_task_set_ro(dmt);
if (task == DM_DEVICE_CREATE) {
if (strlen(mpp->wwid) > 0) {
prefixed_uuid = MALLOC(UUID_PREFIX_LEN +
strlen(mpp->wwid) + 1);
if (!prefixed_uuid) {
condlog(0, "cannot create prefixed uuid : %s",
strerror(errno));
goto addout;
}
sprintf(prefixed_uuid, UUID_PREFIX "%s", mpp->wwid);
if (!dm_task_set_uuid(dmt, prefixed_uuid))
goto freeout;
}
dm_task_skip_lockfs(dmt);
#ifdef LIBDM_API_FLUSH
dm_task_no_flush(dmt);
#endif
}
if (mpp->attribute_flags & (1 << ATTR_MODE) &&
!dm_task_set_mode(dmt, mpp->mode))
goto freeout;
if (mpp->attribute_flags & (1 << ATTR_UID) &&
!dm_task_set_uid(dmt, mpp->uid))
goto freeout;
if (mpp->attribute_flags & (1 << ATTR_GID) &&
!dm_task_set_gid(dmt, mpp->gid))
goto freeout;
condlog(4, "%s: %s [0 %llu %s %s]", mpp->alias,
task == DM_DEVICE_RELOAD ? "reload" : "addmap", mpp->size,
target, params);
dm_task_no_open_count(dmt);
if (task == DM_DEVICE_CREATE &&
!dm_task_set_cookie(dmt, &cookie,
DM_UDEV_DISABLE_LIBRARY_FALLBACK))
goto freeout;
r = dm_task_run (dmt);
if (task == DM_DEVICE_CREATE)
dm_udev_wait(cookie);
freeout:
if (prefixed_uuid)
FREE(prefixed_uuid);
addout:
dm_task_destroy (dmt);
return r;
}
int dm_create_device(const char *name,
const char *device,
const char *cipher,
const char *type,
const char *uuid,
uint64_t size,
uint64_t skip,
uint64_t offset,
size_t key_size,
const char *key,
int read_only,
int reload)
{
struct dm_task *dmt = NULL;
struct dm_info dmi;
char *params = NULL;
char *error = NULL;
char dev_uuid[DM_UUID_LEN] = {0};
int r = -EINVAL;
uint32_t read_ahead = 0;
uint32_t cookie = 0;
uint16_t udev_flags = 0;
params = get_params(device, skip, offset, cipher, key_size, key);
if (!params)
goto out_no_removal;
if (type && !strncmp(type, "TEMP", 4))
udev_flags = CRYPT_TEMP_UDEV_FLAGS;
/* All devices must have DM_UUID, only resize on old device is exception */
if (reload) {
if (!(dmt = dm_task_create(DM_DEVICE_RELOAD)))
goto out_no_removal;
if (!dm_task_set_name(dmt, name))
goto out_no_removal;
} else {
dm_prepare_uuid(name, type, uuid, dev_uuid, sizeof(dev_uuid));
if (!(dmt = dm_task_create(DM_DEVICE_CREATE)))
goto out_no_removal;
if (!dm_task_set_name(dmt, name))
goto out_no_removal;
if (!dm_task_set_uuid(dmt, dev_uuid))
goto out_no_removal;
if (_dm_use_udev() && !dm_task_set_cookie(dmt, &cookie, udev_flags))
goto out_no_removal;
}
if (read_only && !dm_task_set_ro(dmt))
goto out_no_removal;
if (!dm_task_add_target(dmt, 0, size, DM_CRYPT_TARGET, params))
goto out_no_removal;
#ifdef DM_READ_AHEAD_MINIMUM_FLAG
if (_dev_read_ahead(device, &read_ahead) &&
!dm_task_set_read_ahead(dmt, read_ahead, DM_READ_AHEAD_MINIMUM_FLAG))
goto out_no_removal;
#endif
if (!dm_task_run(dmt))
goto out_no_removal;
if (reload) {
dm_task_destroy(dmt);
if (!(dmt = dm_task_create(DM_DEVICE_RESUME)))
goto out;
if (!dm_task_set_name(dmt, name))
goto out;
if (uuid && !dm_task_set_uuid(dmt, dev_uuid))
goto out;
if (_dm_use_udev() && !dm_task_set_cookie(dmt, &cookie, udev_flags))
goto out;
if (!dm_task_run(dmt))
goto out;
}
if (!dm_task_get_info(dmt, &dmi))
goto out;
r = 0;
out:
if (_dm_use_udev()) {
(void)dm_udev_wait(cookie);
cookie = 0;
}
if (r < 0 && !reload) {
if (get_error())
error = strdup(get_error());
dm_remove_device(name, 0, 0);
if (error) {
set_error(error);
free(error);
}
}
out_no_removal:
if (cookie && _dm_use_udev())
(void)dm_udev_wait(cookie);
if (params)
safe_free(params);
if (dmt)
dm_task_destroy(dmt);
dm_task_update_nodes();
return r;
}
