[lvm-devel] main - activate: device_is_usable
Zdenek Kabelac
zkabelac at sourceware.org
Mon Dec 20 15:14:11 UTC 2021
Gitweb: https://sourceware.org/git/?p=lvm2.git;a=commitdiff;h=65236ee7226930bcbabac0d2dc1979a90bcf2d19
Commit: 65236ee7226930bcbabac0d2dc1979a90bcf2d19
Parent: 5a78979b68c4ae822c3f9bcc7ba662c7aa727b40
Author: Zdenek Kabelac <zkabelac at redhat.com>
AuthorDate: Wed Dec 15 11:26:21 2021 +0100
Committer: Zdenek Kabelac <zkabelac at redhat.com>
CommitterDate: Mon Dec 20 16:13:28 2021 +0100
activate: device_is_usable
Move checking of usable uuid into separate function
and pass in also cmd context.
---
lib/activate/activate.c | 2 +-
lib/activate/activate.h | 2 +-
lib/activate/dev_manager.c | 113 ++++++++++++++++++++++++--------------------
lib/filters/filter-usable.c | 2 +-
4 files changed, 66 insertions(+), 53 deletions(-)
diff --git a/lib/activate/activate.c b/lib/activate/activate.c
index 52ec02e2c..9d1fe8ebe 100644
--- a/lib/activate/activate.c
+++ b/lib/activate/activate.c
@@ -413,7 +413,7 @@ int add_areas_line(struct dev_manager *dm, struct lv_segment *seg,
{
return 0;
}
-int device_is_usable(struct device *dev, struct dev_usable_check_params check, int *is_lv)
+int device_is_usable(struct cmd_context *cmd, struct device *dev, struct dev_usable_check_params check, int *is_lv)
{
return 0;
}
diff --git a/lib/activate/activate.h b/lib/activate/activate.h
index edd385aef..6133e6d97 100644
--- a/lib/activate/activate.h
+++ b/lib/activate/activate.h
@@ -254,7 +254,7 @@ struct dev_usable_check_params {
* Returns 1 if mapped device is not suspended, blocked or
* is using a reserved name.
*/
-int device_is_usable(struct device *dev, struct dev_usable_check_params check, int *is_lv);
+int device_is_usable(struct cmd_context *cmd, struct device *dev, struct dev_usable_check_params check, int *is_lv);
/*
* Declaration moved here from fs.h to keep header fs.h hidden
diff --git a/lib/activate/dev_manager.c b/lib/activate/dev_manager.c
index a73a556b2..56575fa85 100644
--- a/lib/activate/dev_manager.c
+++ b/lib/activate/dev_manager.c
@@ -359,7 +359,8 @@ static int _info_run(const char *dlid, struct dm_info *dminfo,
*
* Returns: 1 if mirror should be ignored, 0 if safe to use
*/
-static int _ignore_blocked_mirror_devices(struct device *dev,
+static int _ignore_blocked_mirror_devices(struct cmd_context *cmd,
+ struct device *dev,
uint64_t start, uint64_t length,
char *mirror_status_str)
{
@@ -402,7 +403,7 @@ static int _ignore_blocked_mirror_devices(struct device *dev,
goto_out;
tmp_dev->dev = MKDEV(sm->logs[0].major, sm->logs[0].minor);
- if (device_is_usable(tmp_dev, (struct dev_usable_check_params)
+ if (device_is_usable(cmd, tmp_dev, (struct dev_usable_check_params)
{ .check_empty = 1,
.check_blocked = 1,
.check_suspended = ignore_suspended_devices(),
@@ -606,6 +607,60 @@ static int _ignore_frozen_raid(struct device *dev, const char *params)
return r;
}
+static int _is_usable_uuid(const struct device *dev, const char *name, const char *uuid, int check_reserved, int check_lv, int *is_lv)
+{
+ char *vgname, *lvname, *layer;
+ char vg_name[NAME_LEN];
+
+ if (!check_reserved && !check_lv)
+ return 1;
+
+ if (!strncmp(uuid, UUID_PREFIX, sizeof(UUID_PREFIX) - 1)) { /* with LVM- prefix */
+ if (check_reserved) {
+ /* Check internal lvm devices */
+ if (strlen(uuid) > (sizeof(UUID_PREFIX) + 2 * ID_LEN)) { /* 68 with suffix */
+ log_debug_activation("%s: Reserved uuid %s on internal LV device %s not usable.",
+ dev_name(dev), uuid, name);
+ return 0;
+ }
+
+ /* Recognize some older reserved LVs just from the LV name (snapshot, pvmove...) */
+ vgname = vg_name;
+ if (!dm_strncpy(vg_name, name, sizeof(vg_name)) ||
+ !dm_split_lvm_name(NULL, NULL, &vgname, &lvname, &layer))
+ return_0;
+
+ /* FIXME: fails to handle dev aliases i.e. /dev/dm-5, replace with UUID suffix */
+ if (lvname && (is_reserved_lvname(lvname) || *layer)) {
+ log_debug_activation("%s: Reserved internal LV device %s/%s%s%s not usable.",
+ dev_name(dev), vgname, lvname, *layer ? "-" : "", layer);
+ return 0;
+ }
+ }
+
+ if (check_lv) {
+ /* Skip LVs */
+ if (is_lv)
+ *is_lv = 1;
+ return 0;
+ }
+ }
+
+ if (check_reserved &&
+ (!strncmp(uuid, CRYPT_TEMP, sizeof(CRYPT_TEMP) - 1) ||
+ !strncmp(uuid, CRYPT_SUBDEV, sizeof(CRYPT_SUBDEV) - 1) ||
+ !strncmp(uuid, STRATIS, sizeof(STRATIS) - 1))) {
+ /* Skip private crypto devices */
+ log_debug_activation("%s: Reserved uuid %s on %s device %s not usable.",
+ dev_name(dev), uuid,
+ uuid[0] == 'C' ? "crypto" : "stratis",
+ name);
+ return 0;
+ }
+
+ return 1;
+}
+
/*
* device_is_usable
* @dev
@@ -622,15 +677,14 @@ static int _ignore_frozen_raid(struct device *dev, const char *params)
*
* Returns: 1 if usable, 0 otherwise
*/
-int device_is_usable(struct device *dev, struct dev_usable_check_params check, int *is_lv)
+int device_is_usable(struct cmd_context *cmd, struct device *dev, struct dev_usable_check_params check, int *is_lv)
{
struct dm_task *dmt;
struct dm_info info;
const char *name, *uuid;
uint64_t start, length;
char *target_type = NULL;
- char *params, *vgname, *lvname, *layer;
- char vg_name[NAME_LEN];
+ char *params;
void *next = NULL;
int only_error_or_zero_target = 1;
int r = 0;
@@ -655,50 +709,9 @@ int device_is_usable(struct device *dev, struct dev_usable_check_params check, i
goto out;
}
- if (uuid && (check.check_reserved || check.check_lv)) {
- if (!strncmp(uuid, UUID_PREFIX, sizeof(UUID_PREFIX) - 1)) { /* with LVM- prefix */
- if (check.check_reserved) {
- /* Check internal lvm devices */
- if (strlen(uuid) > (sizeof(UUID_PREFIX) + 2 * ID_LEN)) { /* 68 with suffix */
- log_debug_activation("%s: Reserved uuid %s on internal LV device %s not usable.",
- dev_name(dev), uuid, name);
- goto out;
- }
-
- /* Recognize some older reserved LVs just from the LV name (snapshot, pvmove...) */
- vgname = vg_name;
- if (!dm_strncpy(vg_name, name, sizeof(vg_name)) ||
- !dm_split_lvm_name(NULL, NULL, &vgname, &lvname, &layer))
- goto_out;
-
- /* FIXME: fails to handle dev aliases i.e. /dev/dm-5, replace with UUID suffix */
- if (lvname && (is_reserved_lvname(lvname) || *layer)) {
- log_debug_activation("%s: Reserved internal LV device %s/%s%s%s not usable.",
- dev_name(dev), vgname, lvname, *layer ? "-" : "", layer);
- goto out;
- }
- }
-
- if (check.check_lv) {
- /* Skip LVs */
- if (is_lv)
- *is_lv = 1;
- goto out;
- }
- }
-
- if (check.check_reserved &&
- (!strncmp(uuid, CRYPT_TEMP, sizeof(CRYPT_TEMP) - 1) ||
- !strncmp(uuid, CRYPT_SUBDEV, sizeof(CRYPT_SUBDEV) - 1) ||
- !strncmp(uuid, STRATIS, sizeof(STRATIS) - 1))) {
- /* Skip private crypto devices */
- log_debug_activation("%s: Reserved uuid %s on %s device %s not usable.",
- dev_name(dev), uuid,
- uuid[0] == 'C' ? "crypto" : "stratis",
- name);
- goto out;
- }
- }
+ if (uuid &&
+ !_is_usable_uuid(dev, name, uuid, check.check_reserved, check.check_lv, is_lv))
+ goto out;
/* FIXME Also check for mpath no paths */
do {
@@ -713,7 +726,7 @@ int device_is_usable(struct device *dev, struct dev_usable_check_params check, i
log_debug_activation("%s: Scanning mirror devices is disabled.", dev_name(dev));
goto out;
}
- if (!_ignore_blocked_mirror_devices(dev, start,
+ if (!_ignore_blocked_mirror_devices(cmd, dev, start,
length, params)) {
log_debug_activation("%s: Mirror device %s not usable.",
dev_name(dev), name);
diff --git a/lib/filters/filter-usable.c b/lib/filters/filter-usable.c
index 062fb6c74..d7bdf115e 100644
--- a/lib/filters/filter-usable.c
+++ b/lib/filters/filter-usable.c
@@ -87,7 +87,7 @@ static int _passes_usable_filter(struct cmd_context *cmd, struct dev_filter *f,
break;
}
- if (!(r = device_is_usable(dev, ucp, &is_lv))) {
+ if (!(r = device_is_usable(cmd, dev, ucp, &is_lv))) {
if (is_lv)
dev->filtered_flags |= DEV_FILTERED_IS_LV;
else
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