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Fix automatic dm-crypt module loading.

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git-svn-id: https://cryptsetup.googlecode.com/svn/trunk@222 36d66b0a-2a48-0410-832c-cd162a569da5
This commit is contained in:
Milan Broz
2010-05-03 15:02:47 +00:00
parent 355bd4a224
commit b237358079
2 changed files with 28 additions and 19 deletions
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40
lib/libdevmapper.c
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@@ -18,6 +18,8 @@
#define DM_CRYPT_TARGET "crypt"
#define RETRY_COUNT 5
/* Set if dm-crypt version was probed */
static int _dm_crypt_checked = 0;
static int _dm_crypt_wipe_key_supported = 0;
static int _dm_use_count = 0;
@@ -63,8 +65,7 @@ static void set_dm_error(int level, const char *file, int line,
static int _dm_simple(int task, const char *name, int udev_wait);
static void _dm_set_crypt_compat(struct crypt_device *context,
int maj, int min, int patch)
static void _dm_set_crypt_compat(int maj, int min, int patch)
{
log_dbg("Detected dm-crypt target of version %i.%i.%i.", maj, min, patch);
@@ -72,44 +73,39 @@ static void _dm_set_crypt_compat(struct crypt_device *context,
_dm_crypt_wipe_key_supported = 1;
else
log_dbg("Suspend and resume disabled, no wipe key support.");
_dm_crypt_checked = 1;
}
static int _dm_check_versions(struct crypt_device *context)
static int _dm_check_versions(void)
{
int r = 0;
struct dm_task *dmt;
struct dm_versions *target, *last_target;
if (_dm_crypt_checked)
return 1;
if (!(dmt = dm_task_create(DM_DEVICE_LIST_VERSIONS)))
goto fail_versions;
return 0;
if (!dm_task_run(dmt)) {
dm_task_destroy(dmt);
goto fail_versions;
return 0;
}
target = dm_task_get_versions(dmt);
do {
last_target = target;
if (!strcmp(DM_CRYPT_TARGET, target->name)) {
r = 1;
_dm_set_crypt_compat(context,
(int)target->version[0],
_dm_set_crypt_compat((int)target->version[0],
(int)target->version[1],
(int)target->version[2]);
}
target = (void *) target + target->next;
} while (last_target != target);
if (!r)
log_err(context, _("Cannot find compatible device-mapper kernel modules.\n"));
dm_task_destroy(dmt);
return r;
fail_versions:
log_err(context, _("Cannot initialize device-mapper. Is dm_mod kernel module loaded?\n"));
return 0;
return 1;
}
int dm_init(struct crypt_device *context, int check_kernel)
@@ -118,8 +114,10 @@ int dm_init(struct crypt_device *context, int check_kernel)
log_dbg("Initialising device-mapper backend%s, UDEV is %sabled.",
check_kernel ? "" : " (NO kernel check requested)",
_dm_use_udev() ? "en" : "dis");
if (check_kernel && !_dm_check_versions(context))
if (check_kernel && !_dm_check_versions()) {
log_err(context, _("Cannot initialize device-mapper. Is dm_mod kernel module loaded?\n"));
return -1;
}
if (getuid() || geteuid())
log_dbg(("WARNING: Running as a non-root user. Functionality may be unavailable."));
dm_log_init(set_dm_error);
@@ -714,6 +712,9 @@ static int _dm_message(const char *name, const char *msg)
int dm_suspend_and_wipe_key(const char *name)
{
if (!_dm_check_versions())
return -ENOTSUP;
if (!_dm_crypt_wipe_key_supported)
return -ENOTSUP;
@@ -736,6 +737,9 @@ int dm_resume_and_reinstate_key(const char *name,
char *msg;
int r = 0;
if (!_dm_check_versions())
return -ENOTSUP;
if (!_dm_crypt_wipe_key_supported)
return -ENOTSUP;