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devices: dm uuid related function names

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In the context of dm, 'device' refers to a dm device, but
in the context of lvm, 'device' refers to struct device.
Change some lvm function names to make that difference clearer.

dev_manager_get_device_list() -> dev_manager_get_dm_active_devices()
get_device_list() -> get_dm_active_devices()
device_get_uuid() -> dev_dm_uuid(), devno_dm_uuid()
This commit is contained in:
David Teigland 2024-06-28 13:35:12 -05:00
parent 680f7bd676
commit 990f4f7c4f
10 changed files with 42 additions and 25 deletions
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4
lib/activate/activate.c
View File

@ -672,13 +672,13 @@ 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,
int get_dm_active_devices(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);
return dev_manager_get_dm_active_devices(NULL, devs, devs_features);
}
/*

6
lib/activate/activate.h
View File

@ -107,9 +107,11 @@ int target_present(struct cmd_context *cmd, const char *target_name,
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,
int get_dm_active_devices(const struct volume_group *vg, struct dm_list **devs,
unsigned *devs_features);
int device_get_uuid(struct cmd_context *cmd, int major, int minor,
int devno_dm_uuid(struct cmd_context *cmd, int major, int minor,
char *uuid_buf, size_t uuid_buf_size);
int dev_dm_uuid(struct cmd_context *cmd, struct device *dev,
char *uuid_buf, size_t uuid_buf_size);
int raid4_is_supported(struct cmd_context *cmd, const struct segment_type *segtype);

16
lib/activate/dev_manager.c
View File

@ -888,7 +888,7 @@ int device_is_usable(struct cmd_context *cmd, struct device *dev, struct dev_usa
}
/* Read UUID from a given DM device into buf_uuid */
int device_get_uuid(struct cmd_context *cmd, int major, int minor,
int devno_dm_uuid(struct cmd_context *cmd, int major, int minor,
char *uuid_buf, size_t uuid_buf_size)
{
struct dm_task *dmt;
@ -918,6 +918,13 @@ int device_get_uuid(struct cmd_context *cmd, int major, int minor,
return r;
}
int dev_dm_uuid(struct cmd_context *cmd, struct device *dev,
char *uuid_buf, size_t uuid_buf_size)
{
return devno_dm_uuid(cmd, MAJOR(dev->dev), MINOR(dev->dev),
uuid_buf, uuid_buf_size);
}
/*
* If active LVs were activated by a version of LVM2 before 2.02.00 we must
* perform additional checks to find them because they do not have the LVM-
@ -1036,7 +1043,12 @@ 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)
/*
* Get a list of active dm devices from the kernel.
* The 'devs' list contains a struct dm_active_device.
*/
int dev_manager_get_dm_active_devices(const char *prefix, struct dm_list **devs, unsigned *devs_features)
{
struct dm_task *dmt;
int r = 1;

2
lib/activate/dev_manager.h
View File

@ -108,7 +108,7 @@ 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,
int dev_manager_get_dm_active_devices(const char *prefix, struct dm_list **devs,
unsigned *devs_features);
#endif

4
lib/device/dev-cache.c
View File

@ -593,7 +593,7 @@ static int _get_vgid_and_lvid_for_dev(struct cmd_context *cmd, struct device *de
char uuid[DM_UUID_LEN];
size_t uuid_len;
if (!device_get_uuid(cmd, MAJOR(dev->dev), MINOR(dev->dev), uuid, sizeof(uuid)))
if (!dev_dm_uuid(cmd, dev, uuid, sizeof(uuid)))
return_0;
uuid_len = strlen(uuid);
@ -1343,7 +1343,7 @@ int dev_cache_update_dm_devs(struct cmd_context *cmd)
_cache.dm_uuids = NULL;
}
if (!get_device_list(NULL, &cmd->cache_dm_devs, &devs_features))
if (!get_dm_active_devices(NULL, &cmd->cache_dm_devs, &devs_features))
return 1;
if (!(devs_features & DM_DEVICE_LIST_HAS_UUID)) {

2
lib/device/dev-mpath.c
View File

@ -535,7 +535,7 @@ static int _dev_is_mpath_component_sysfs(struct cmd_context *cmd, struct device
/* Check whether holder's UUID uses MPATH prefix */
/* TODO: reuse/merge with dev_has_mpath_uuid() as this function also recognizes kpartx partition */
if (device_get_uuid(cmd, dm_dev_major, dm_dev_minor, uuid, sizeof(uuid)) &&
if (devno_dm_uuid(cmd, dm_dev_major, dm_dev_minor, uuid, sizeof(uuid)) &&
!strncmp(uuid, MPATH_PREFIX, sizeof(MPATH_PREFIX) - 1)) {
log_debug_devs("dev_is_mpath_component %s holder %s %u:%u ignore mpath component",
dev_name(dev), holder_name, dm_dev_major, dm_dev_minor);

5
lib/device/dev-type.c
View File

@ -55,8 +55,7 @@ int dev_is_lv(struct cmd_context *cmd, struct device *dev)
{
char buffer[128];
if (device_get_uuid(cmd, MAJOR(dev->dev), MINOR(dev->dev),
buffer, sizeof(buffer)) &&
if (dev_dm_uuid(cmd, dev, buffer, sizeof(buffer)) &&
!strncmp(buffer, UUID_PREFIX, sizeof(UUID_PREFIX) - 1))
return 1;
@ -128,7 +127,7 @@ int dev_is_used_by_active_lv(struct cmd_context *cmd, struct device *dev, int *u
* by reading DM status and seeing if the uuid begins
* with UUID_PREFIX ("LVM-")
*/
if (!device_get_uuid(cmd, dm_dev_major, dm_dev_minor, dm_uuid, sizeof(dm_uuid)))
if (!devno_dm_uuid(cmd, dm_dev_major, dm_dev_minor, dm_uuid, sizeof(dm_uuid)))
continue;
if (!strncmp(dm_uuid, UUID_PREFIX, lvm_prefix_len))

10
lib/device/device_id.c
View File

@ -512,7 +512,7 @@ int dev_has_mpath_uuid(struct cmd_context *cmd, struct device *dev, char **idnam
char uuid[DM_UUID_LEN];
char *idname;
if (!device_get_uuid(cmd, MAJOR(dev->dev), MINOR(dev->dev), uuid, sizeof(uuid)))
if (!dev_dm_uuid(cmd, dev, uuid, sizeof(uuid)))
return_0;
if (!_dm_uuid_has_prefix(uuid, "mpath-"))
@ -531,7 +531,7 @@ static int _dev_has_crypt_uuid(struct cmd_context *cmd, struct device *dev, char
char uuid[DM_UUID_LEN];
char *idname;
if (!device_get_uuid(cmd, MAJOR(dev->dev), MINOR(dev->dev), uuid, sizeof(uuid)))
if (!dev_dm_uuid(cmd, dev, uuid, sizeof(uuid)))
return_0;
if (!_dm_uuid_has_prefix(uuid, "CRYPT-"))
@ -550,7 +550,7 @@ static int _dev_has_lvmlv_uuid(struct cmd_context *cmd, struct device *dev, char
char uuid[DM_UUID_LEN];
char *idname;
if (!device_get_uuid(cmd, MAJOR(dev->dev), MINOR(dev->dev), uuid, sizeof(uuid)))
if (!dev_dm_uuid(cmd, dev, uuid, sizeof(uuid)))
return_0;
if (!_dm_uuid_has_prefix(uuid, UUID_PREFIX))
@ -786,7 +786,7 @@ char *device_id_system_read(struct cmd_context *cmd, struct device *dev, uint16_
case DEV_ID_TYPE_MPATH_UUID:
case DEV_ID_TYPE_CRYPT_UUID:
case DEV_ID_TYPE_LVMLV_UUID:
(void)device_get_uuid(cmd, MAJOR(dev->dev), MINOR(dev->dev), sysbuf, sizeof(sysbuf));
(void)dev_dm_uuid(cmd, dev, sysbuf, sizeof(sysbuf));
break;
case DEV_ID_TYPE_MD_UUID:
read_sys_block(cmd, dev, "md/uuid", sysbuf, sizeof(sysbuf));
@ -1005,7 +1005,7 @@ static int _dev_has_stable_id(struct cmd_context *cmd, struct device *dev)
}
if ((MAJOR(dev->dev) == cmd->dev_types->device_mapper_major)) {
if (!device_get_uuid(cmd, MAJOR(dev->dev), MINOR(dev->dev), sysbuf, sizeof(sysbuf)))
if (!dev_dm_uuid(cmd, dev, sysbuf, sizeof(sysbuf)))
goto_out;
if (_dm_uuid_has_prefix(sysbuf, "mpath-"))

8
lib/label/label.c
View File

@ -1257,8 +1257,12 @@ int label_scan(struct cmd_context *cmd)
if (!label_scan_setup_bcache())
return_0;
/* Initialize dm device cache early so
* 'Hints' file processing can also use it */
/*
* Initialize cache of dm device uuids, which uses a special dm kernel
* feature for efficiently querying many dm devs together. (It's done
* here, before processing the hints file, so that the dm uuid checks
* in hint processing can benefit from the dm uuid cache.)
*/
if (!dev_cache_update_dm_devs(cmd))
return_0;

2
tools/toollib.c
View File

@ -6066,7 +6066,7 @@ int get_rootvg_dev_uuid(struct cmd_context *cmd, char **dm_uuid_out)
if (stat(me->mnt_dir, &info) < 0)
return_0;
if (!device_get_uuid(cmd, MAJOR(info.st_dev), MINOR(info.st_dev), dm_uuid, sizeof(dm_uuid)))
if (!devno_dm_uuid(cmd, MAJOR(info.st_dev), MINOR(info.st_dev), dm_uuid, sizeof(dm_uuid)))
return_0;
log_debug("Found root dm_uuid %s", dm_uuid);