shaba/lvm2
1
0
Fork 0
mirror of git://sourceware.org/git/lvm2.git synced 2024-12-21 13:34:40 +03:00
Code Releases Activity

activate: add get_device_list

Browse Source 
Add funtion get_device_list() to get list of active DM devices.
Handled through new dm_task_get_device_list().
This commit is contained in:
Zdenek Kabelac 2021-12-15 11:24:31 +01:00
parent 988ea0e94c
commit 0d67bc96fd
4 changed files with 43 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
lib/activate/activate.c
View File

@ -624,6 +624,15 @@ int target_present(struct cmd_context *cmd, const char *target_name,
&maj, &min, &patchlevel);
}
int get_device_list(const struct volume_group *vg, struct dm_list **devs,
unsigned *devs_features)
{
if (!activation())
return 0;
return dev_manager_get_device_list(NULL, devs, devs_features);
}
/*
* When '*info' is NULL, returns 1 only when LV is active.
* When '*info' != NULL, returns 1 when info structure is populated.

4
lib/activate/activate.h
View File

@ -106,6 +106,10 @@ int target_present(struct cmd_context *cmd, const char *target_name,
int use_modprobe);
int target_version(const char *target_name, uint32_t *maj,
uint32_t *min, uint32_t *patchlevel);
int get_device_list(const struct volume_group *vg, struct dm_list **devs,
unsigned *devs_features);
int raid4_is_supported(struct cmd_context *cmd, const struct segment_type *segtype);
int lvm_dm_prefix_check(int major, int minor, const char *prefix);
int list_segment_modules(struct dm_pool *mem, const struct lv_segment *seg,

29
lib/activate/dev_manager.c
View File

@ -138,8 +138,16 @@ static struct dm_task *_setup_task_run(int task, struct dm_info *info,
if (!with_flush && !dm_task_no_flush(dmt))
log_warn("WARNING: Failed to set no_flush.");
if (task == DM_DEVICE_TARGET_MSG)
switch (task) {
case DM_DEVICE_TARGET_MSG:
return dmt; /* TARGET_MSG needs more local tweaking before task_run() */
case DM_DEVICE_LIST:
if (!dm_task_set_newuuid(dmt, " ")) // new uuid has no meaning here
log_warn("WARNING: Failed to query uuid with LIST.");
break;
default:
break;
}
if (!dm_task_run(dmt))
goto_out;
@ -922,6 +930,25 @@ int dev_manager_check_prefix_dm_major_minor(uint32_t major, uint32_t minor, cons
return r;
}
int dev_manager_get_device_list(const char *prefix, struct dm_list **devs, unsigned *devs_features)
{
struct dm_task *dmt;
int r = 1;
if (!(dmt = _setup_task_run(DM_DEVICE_LIST, NULL, NULL, NULL, 0, 0, 0, 0, 0, 0)))
return_0;
if (!dm_task_get_device_list(dmt, devs, devs_features)) {
r = 0;
goto_out;
}
out:
dm_task_destroy(dmt);
return r;
}
int dev_manager_info(struct cmd_context *cmd,
const struct logical_volume *lv, const char *layer,
int with_open_count, int with_read_ahead, int with_name_check,

2
lib/activate/dev_manager.h
View File

@ -103,5 +103,7 @@ int dev_manager_device_uses_vg(struct device *dev,
int dev_manager_remove_dm_major_minor(uint32_t major, uint32_t minor);
int dev_manager_check_prefix_dm_major_minor(uint32_t major, uint32_t minor, const char *prefix);
int dev_manager_get_device_list(const char *prefix, struct dm_list **devs,
unsigned *devs_features);
#endif