static int
dm_get_prefixed_uuid(const char *name, char *uuid)
{
struct dm_task *dmt;
const char *uuidtmp;
int r = 1;
dmt = dm_task_create(DM_DEVICE_INFO);
if (!dmt)
return 1;
if (!dm_task_set_name (dmt, name))
goto uuidout;
if (!dm_task_run(dmt))
goto uuidout;
uuidtmp = dm_task_get_uuid(dmt);
if (uuidtmp)
strcpy(uuid, uuidtmp);
else
uuid[0] = '\0';
r = 0;
uuidout:
dm_task_destroy(dmt);
return r;
}
int dm_event_unregister_handler(const struct dm_event_handler *dmevh)
{
int ret = 1, err;
const char *uuid;
struct dm_task *dmt;
struct dm_event_daemon_message msg = { 0, 0, NULL };
if (!(dmt = _get_device_info(dmevh))) {
stack;
return 0;
}
uuid = dm_task_get_uuid(dmt);
if ((err = _do_event(DM_EVENT_CMD_UNREGISTER_FOR_EVENT, dmevh->dmeventd_path, &msg,
dmevh->dso, uuid, dmevh->mask, dmevh->timeout)) < 0) {
log_error("%s: event deregistration failed: %s",
dm_task_get_name(dmt),
msg.data ? msg.data : strerror(-err));
ret = 0;
}
dm_free(msg.data);
dm_task_destroy(dmt);
return ret;
}
extern int
dm_is_mpath(const char * name)
{
int r = 0;
struct dm_task *dmt;
struct dm_info info;
uint64_t start, length;
char *target_type = NULL;
char *params;
const char *uuid;
if (!(dmt = dm_task_create(DM_DEVICE_TABLE)))
return 0;
if (!dm_task_set_name(dmt, name))
goto out;
dm_task_no_open_count(dmt);
if (!dm_task_run(dmt))
goto out;
if (!dm_task_get_info(dmt, &info) || !info.exists)
goto out;
uuid = dm_task_get_uuid(dmt);
if (!uuid || strncmp(uuid, UUID_PREFIX, UUID_PREFIX_LEN) != 0)
goto out;
/* Fetch 1st target */
dm_get_next_target(dmt, NULL, &start, &length, &target_type, ¶ms);
if (!target_type || strcmp(target_type, TGT_MPATH) != 0)
goto out;
r = 1;
out:
dm_task_destroy(dmt);
return r;
}
static int dm_map_present(char *str, char **uuid)
{
int r = 0;
struct dm_task *dmt;
const char *uuidtmp;
struct dm_info info;
if (uuid)
*uuid = NULL;
if (!(dmt = dm_task_create(DM_DEVICE_INFO)))
return 0;
if (!dm_task_set_name(dmt, str))
goto out;
dm_task_no_open_count(dmt);
if (!dm_task_run(dmt))
goto out;
if (!dm_task_get_info(dmt, &info))
goto out;
if (!info.exists)
goto out;
r = 1;
if (uuid) {
uuidtmp = dm_task_get_uuid(dmt);
if (uuidtmp && strlen(uuidtmp))
*uuid = strdup(uuidtmp);
}
out:
dm_task_destroy(dmt);
return r;
}
/*
* Returns 0 if handler found; error (-ENOMEM, -ENOENT) otherwise.
*/
int dm_event_get_registered_device(struct dm_event_handler *dmevh, int next)
{
int ret = 0;
const char *uuid = NULL;
char *reply_dso = NULL, *reply_uuid = NULL;
enum dm_event_mask reply_mask = 0;
struct dm_task *dmt = NULL;
struct dm_event_daemon_message msg = { 0, 0, NULL };
struct dm_info info;
if (!(dmt = _get_device_info(dmevh))) {
stack;
return 0;
}
uuid = dm_task_get_uuid(dmt);
if (!(ret = _do_event(next ? DM_EVENT_CMD_GET_NEXT_REGISTERED_DEVICE :
DM_EVENT_CMD_GET_REGISTERED_DEVICE, dmevh->dmeventd_path,
&msg, dmevh->dso, uuid, dmevh->mask, 0))) {
/* FIXME this will probably horribly break if we get
ill-formatted reply */
ret = _parse_message(&msg, &reply_dso, &reply_uuid, &reply_mask);
} else {
ret = -ENOENT;
goto fail;
}
dm_task_destroy(dmt);
dmt = NULL;
dm_free(msg.data);
msg.data = NULL;
_dm_event_handler_clear_dev_info(dmevh);
dmevh->uuid = dm_strdup(reply_uuid);
if (!dmevh->uuid) {
ret = -ENOMEM;
goto fail;
}
if (!(dmt = _get_device_info(dmevh))) {
ret = -ENXIO; /* dmeventd probably gave us bogus uuid back */
goto fail;
}
dm_event_handler_set_dso(dmevh, reply_dso);
dm_event_handler_set_event_mask(dmevh, reply_mask);
dm_free(reply_dso);
reply_dso = NULL;
dm_free(reply_uuid);
reply_uuid = NULL;
dmevh->dev_name = dm_strdup(dm_task_get_name(dmt));
if (!dmevh->dev_name) {
ret = -ENOMEM;
goto fail;
}
if (!dm_task_get_info(dmt, &info)) {
ret = -1;
goto fail;
}
dmevh->major = info.major;
dmevh->minor = info.minor;
dm_task_destroy(dmt);
return ret;
fail:
dm_free(msg.data);
dm_free(reply_dso);
dm_free(reply_uuid);
_dm_event_handler_clear_dev_info(dmevh);
if (dmt)
dm_task_destroy(dmt);
return ret;
}
int device_is_usable(struct device *dev)
{
struct dm_task *dmt;
struct dm_info info;
const char *name, *uuid;
uint64_t start, length;
char *target_type = NULL;
char *params, *vgname = NULL, *lvname, *layer;
void *next = NULL;
int r = 0;
if (!(dmt = dm_task_create(DM_DEVICE_STATUS))) {
log_error("Failed to allocate dm_task struct to check dev status");
return 0;
}
if (!dm_task_set_major_minor(dmt, MAJOR(dev->dev), MINOR(dev->dev), 1))
goto_out;
if (!dm_task_run(dmt)) {
log_error("Failed to get state of mapped device");
goto out;
}
if (!dm_task_get_info(dmt, &info))
goto_out;
if (!info.exists || info.suspended)
goto out;
name = dm_task_get_name(dmt);
uuid = dm_task_get_uuid(dmt);
/* FIXME Also check for mirror block_on_error and mpath no paths */
/* For now, we exclude all mirrors */
do {
next = dm_get_next_target(dmt, next, &start, &length,
&target_type, ¶ms);
/* Skip if target type doesn't match */
if (target_type && !strcmp(target_type, "mirror")) {
log_debug("%s: Mirror device not usable.", dev_name(dev));
goto out;
}
} while (next);
/* FIXME Also check dependencies? */
/* Check internal lvm devices */
if (uuid && !strncmp(uuid, UUID_PREFIX, sizeof(UUID_PREFIX) - 1)) {
if (!(vgname = dm_strdup(name)) ||
!dm_split_lvm_name(NULL, NULL, &vgname, &lvname, &layer))
goto_out;
if (lvname && (is_reserved_lvname(lvname) || *layer)) {
log_debug("%s: Reserved internal LV device %s/%s%s%s not usable.",
dev_name(dev), vgname, lvname, *layer ? "-" : "", layer);
goto out;
}
}
r = 1;
out:
dm_free(vgname);
dm_task_destroy(dmt);
return r;
}
int era_dm_info(const char *name,
const char *uuid,
struct era_dm_info *info,
size_t name_size, char *name_ptr,
size_t uuid_size, char *uuid_ptr)
{
struct dm_task *dmt;
struct dm_info dmi;
int rc = -1;
if (!(dmt = dm_task_create(DM_DEVICE_INFO)))
return -1;
if (name && !dm_task_set_name(dmt, name))
goto out;
if (uuid && !dm_task_set_uuid(dmt, uuid))
goto out;
if (!dm_task_run(dmt))
goto out;
if (!dm_task_get_info(dmt, &dmi))
goto out;
if (info)
{
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;
}
if (dmi.exists && name_size > 0 && name_ptr)
{
const char *dm_name;
size_t dm_name_len;
dm_name = dm_task_get_name(dmt);
if (!dm_name)
goto out;
dm_name_len = strlen(dm_name);
if (dm_name_len >= name_size)
{
rc = dm_name_len + 1;
goto out;
}
strcpy(name_ptr, dm_name);
}
if (dmi.exists && uuid_size > 0 && uuid_ptr)
{
const char *dm_uuid;
size_t dm_uuid_len;
dm_uuid = dm_task_get_uuid(dmt);
if (!dm_uuid)
goto out;
dm_uuid_len = strlen(dm_uuid);
if (dm_uuid_len >= uuid_size)
{
dm_task_destroy(dmt);
return dm_uuid_len + 1;
}
strcpy(uuid_ptr, dm_uuid);
}
rc = 0;
out:
dm_task_destroy(dmt);
return rc;
}
int dm_query_device(const char *name,
char **device,
uint64_t *size,
uint64_t *skip,
uint64_t *offset,
char **cipher,
int *key_size,
char **key,
int *read_only,
int *suspended,
char **uuid)
{
struct dm_task *dmt;
struct dm_info dmi;
uint64_t start, length, val64;
char *target_type, *params, *rcipher, *key_, *rdevice, *endp, buffer[3], *tmp_uuid;
void *next = NULL;
int i, r = -EINVAL;
if (!(dmt = dm_task_create(DM_DEVICE_TABLE)))
goto out;
if (!dm_task_set_name(dmt, name))
goto out;
r = -ENODEV;
if (!dm_task_run(dmt))
goto out;
r = -EINVAL;
if (!dm_task_get_info(dmt, &dmi))
goto out;
if (!dmi.exists) {
r = -ENODEV;
goto out;
}
next = dm_get_next_target(dmt, next, &start, &length,
&target_type, ¶ms);
if (!target_type || strcmp(target_type, DM_CRYPT_TARGET) != 0 ||
start != 0 || next)
goto out;
if (size)
*size = length;
rcipher = strsep(¶ms, " ");
/* cipher */
if (cipher)
*cipher = strdup(rcipher);
/* skip */
key_ = strsep(¶ms, " ");
if (!params)
goto out;
val64 = strtoull(params, ¶ms, 10);
if (*params != ' ')
goto out;
params++;
if (skip)
*skip = val64;
/* device */
rdevice = strsep(¶ms, " ");
if (device)
*device = lookup_dev(rdevice);
/*offset */
if (!params)
goto out;
val64 = strtoull(params, ¶ms, 10);
if (*params)
goto out;
if (offset)
*offset = val64;
/* key_size */
if (key_size)
*key_size = strlen(key_) / 2;
/* key */
if (key_size && key) {
*key = safe_alloc(*key_size);
if (!*key) {
r = -ENOMEM;
goto out;
}
buffer[2] = '\0';
for(i = 0; i < *key_size; i++) {
memcpy(buffer, &key_[i * 2], 2);
(*key)[i] = strtoul(buffer, &endp, 16);
if (endp != &buffer[2]) {
safe_free(key);
*key = NULL;
goto out;
}
}
}
memset(key_, 0, strlen(key_));
if (read_only)
*read_only = dmi.read_only;
if (suspended)
*suspended = dmi.suspended;
if (uuid && (tmp_uuid = (char*)dm_task_get_uuid(dmt)) &&
!strncmp(tmp_uuid, DM_UUID_PREFIX, DM_UUID_PREFIX_LEN))
*uuid = strdup(tmp_uuid + DM_UUID_PREFIX_LEN);
r = (dmi.open_count > 0);
out:
if (dmt)
dm_task_destroy(dmt);
return r;
}
