aboutsummaryrefslogtreecommitdiff
path: root/drivers
diff options
context:
space:
mode:
Diffstat (limited to 'drivers')
-rw-r--r--drivers/md/dm-ioctl.c14
-rw-r--r--drivers/md/dm.c25
-rw-r--r--drivers/md/dm.h3
3 files changed, 31 insertions, 11 deletions
diff --git a/drivers/md/dm-ioctl.c b/drivers/md/dm-ioctl.c
index 1128d3fba79..1c871736f48 100644
--- a/drivers/md/dm-ioctl.c
+++ b/drivers/md/dm-ioctl.c
@@ -276,7 +276,7 @@ retry:
up_write(&_hash_lock);
}
-static int dm_hash_rename(const char *old, const char *new)
+static int dm_hash_rename(uint32_t cookie, const char *old, const char *new)
{
char *new_name, *old_name;
struct hash_cell *hc;
@@ -333,7 +333,7 @@ static int dm_hash_rename(const char *old, const char *new)
dm_table_put(table);
}
- dm_kobject_uevent(hc->md);
+ dm_kobject_uevent(hc->md, KOBJ_CHANGE, cookie);
dm_put(hc->md);
up_write(&_hash_lock);
@@ -680,6 +680,9 @@ static int dev_remove(struct dm_ioctl *param, size_t param_size)
__hash_remove(hc);
up_write(&_hash_lock);
+
+ dm_kobject_uevent(md, KOBJ_REMOVE, param->event_nr);
+
dm_put(md);
param->data_size = 0;
return 0;
@@ -715,7 +718,7 @@ static int dev_rename(struct dm_ioctl *param, size_t param_size)
return r;
param->data_size = 0;
- return dm_hash_rename(param->name, new_name);
+ return dm_hash_rename(param->event_nr, param->name, new_name);
}
static int dev_set_geometry(struct dm_ioctl *param, size_t param_size)
@@ -842,8 +845,11 @@ static int do_resume(struct dm_ioctl *param)
if (dm_suspended(md))
r = dm_resume(md);
- if (!r)
+
+ if (!r) {
+ dm_kobject_uevent(md, KOBJ_CHANGE, param->event_nr);
r = __dev_status(md, param);
+ }
dm_put(md);
return r;
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 36142e947ff..a9210bb594e 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -24,6 +24,13 @@
#define DM_MSG_PREFIX "core"
+/*
+ * Cookies are numeric values sent with CHANGE and REMOVE
+ * uevents while resuming, removing or renaming the device.
+ */
+#define DM_COOKIE_ENV_VAR_NAME "DM_COOKIE"
+#define DM_COOKIE_LENGTH 24
+
static const char *_name = DM_NAME;
static unsigned int major = 0;
@@ -1731,11 +1738,7 @@ int dm_resume(struct mapped_device *md)
clear_bit(DMF_SUSPENDED, &md->flags);
dm_table_unplug_all(map);
-
- dm_kobject_uevent(md);
-
r = 0;
-
out:
dm_table_put(map);
mutex_unlock(&md->suspend_lock);
@@ -1746,9 +1749,19 @@ out:
/*-----------------------------------------------------------------
* Event notification.
*---------------------------------------------------------------*/
-void dm_kobject_uevent(struct mapped_device *md)
+void dm_kobject_uevent(struct mapped_device *md, enum kobject_action action,
+ unsigned cookie)
{
- kobject_uevent(&disk_to_dev(md->disk)->kobj, KOBJ_CHANGE);
+ char udev_cookie[DM_COOKIE_LENGTH];
+ char *envp[] = { udev_cookie, NULL };
+
+ if (!cookie)
+ kobject_uevent(&disk_to_dev(md->disk)->kobj, action);
+ else {
+ snprintf(udev_cookie, DM_COOKIE_LENGTH, "%s=%u",
+ DM_COOKIE_ENV_VAR_NAME, cookie);
+ kobject_uevent_env(&disk_to_dev(md->disk)->kobj, action, envp);
+ }
}
uint32_t dm_next_uevent_seq(struct mapped_device *md)
diff --git a/drivers/md/dm.h b/drivers/md/dm.h
index a31506d93e9..b5935c610c4 100644
--- a/drivers/md/dm.h
+++ b/drivers/md/dm.h
@@ -92,7 +92,8 @@ void dm_stripe_exit(void);
int dm_open_count(struct mapped_device *md);
int dm_lock_for_deletion(struct mapped_device *md);
-void dm_kobject_uevent(struct mapped_device *md);
+void dm_kobject_uevent(struct mapped_device *md, enum kobject_action action,
+ unsigned cookie);
int dm_kcopyd_init(void);
void dm_kcopyd_exit(void);