It commit is enhancement for 1d0dc74f9147e3c1f3681efa4166cbe2edcb6571
1d0dc74f9147 only supports all raid type, this commit adds new api
and extends support scope with linear/mirror type.
This patch introduced a new flag NOT_AVAIL_LV, when a lv (includeing
sub-lv or child-lv) doesn't work, this flag will set.
With this patch, for linear type LV, one of two disks missing,
lvdisplay will show
from:
LV Status available (partial)
to:
LV Status NOT available (partial)
Signed-off-by: Zhao Heming <heming.z...@suse.com>
---
v2:
- change patch subject
from: lvdisplay: dispaly correct status on linear type
to: lib/metadata: add new api lv_is_available()
- add new flag NOT_AVAIL_LV
- change api lv_is_available() from function to macro define
v1:
- based on commit 1d0dc74f914
- change raid_is_available to lv_is_available
- add linear support
---
lib/display/display.c | 7 +--
lib/metadata/metadata-exported.h | 3 +
lib/metadata/metadata.c | 95 +++++++++++++++++++++++++++++++-
lib/metadata/segtype.h | 1 -
lib/raid/raid.c | 54 ------------------
5 files changed, 99 insertions(+), 61 deletions(-)
diff --git a/lib/display/display.c b/lib/display/display.c
index 3bb570f03..7c4ec9bb3 100644
--- a/lib/display/display.c
+++ b/lib/display/display.c
@@ -399,7 +399,7 @@ int lvdisplay_full(struct cmd_context *cmd,
void *handle __attribute__((unused)))
{
struct lvinfo info;
- int inkernel, snap_active = 0, partial = 0, raid_is_avail = 1;
+ int inkernel, snap_active = 0, partial = 0, lv_is_avail = 1;
char uuid[64] __attribute__((aligned(8)));
const char *access_str;
struct lv_segment *snap_seg = NULL, *mirror_seg = NULL;
@@ -555,15 +555,14 @@ int lvdisplay_full(struct cmd_context *cmd,
if (lv_is_partial(lv)) {
partial = 1;
- if (lv_is_raid(lv))
- raid_is_avail = raid_is_available(lv) ? 1 : 0;
+ lv_is_avail = lv_is_available(lv) ? 1 : 0;
}
if (inkernel && info.suspended)
log_print("LV Status suspended");
else if (activation())
log_print("LV Status %savailable %s",
- (inkernel && raid_is_avail) ? "" : "NOT ",
+ (inkernel && lv_is_avail) ? "" : "NOT ",
partial ? "(partial)" : "");
/********* FIXME lv_number
diff --git a/lib/metadata/metadata-exported.h b/lib/metadata/metadata-exported.h
index 06ea757b8..a7fb88e6e 100644
--- a/lib/metadata/metadata-exported.h
+++ b/lib/metadata/metadata-exported.h
@@ -88,6 +88,8 @@
#define PV_MOVED_VG UINT64_C(0x4000000000000000) /* PV - Moved
to a new VG */
#define PARTIAL_LV UINT64_C(0x0000000001000000) /* LV - derived
flag, not
written out in
metadata*/
+#define NOT_AVAIL_LV UINT64_C(0x0000000080000000) /* LV - derived flag,
not
+ written out in
metadata*/
#define WRITECACHE_ORIGIN UINT64_C(0x0000000002000000)
#define INTEGRITY_METADATA UINT64_C(0x0000000004000000) /* LV -
Internal use only */
@@ -214,6 +216,7 @@
#define lv_is_locked(lv) (((lv)->status & LOCKED) ? 1 : 0)
#define lv_is_partial(lv) (((lv)->status & PARTIAL_LV) ? 1 : 0)
+#define lv_is_available(lv) (((lv)->status & NOT_AVAIL_LV) ? 0 : 1)
#define lv_is_virtual(lv) (((lv)->status & VIRTUAL) ? 1 : 0)
#define lv_is_merging(lv) (((lv)->status & MERGING) ? 1 : 0)
#define lv_is_merging_origin(lv) (lv_is_merging(lv) && (lv)->snapshot)
diff --git a/lib/metadata/metadata.c b/lib/metadata/metadata.c
index c0d42066d..828788566 100644
--- a/lib/metadata/metadata.c
+++ b/lib/metadata/metadata.c
@@ -2043,6 +2043,92 @@ static int _lv_mark_if_partial_collect(struct
logical_volume *lv, void *data)
return 1;
}
+/*
+ * Return LV is still work or not when underlying dev is removed
+ *
+ * RAID:
+ * - raid 0: if there is any disk loose, return false
+ * - raid1,10,4/5,6: below case think as available, return true:
+ * - raid 1: at least 1 disk live
+ * - raid 10: loose 1 disk
+ * - raid 4/5: loose 1 disk
+ * - raid 6: loose 2 disk
+ *
+ * LINEAR:
+ * - if there is any disk loose, return false
+ *
+ * MIRROR:
+ * - mirror type won't be in 'not available' status, return true directly.
+ * - the failing rule
+ * - 3-way mirror convert to 2-way mirror
+ * - 2-way mirror to linear device
+ *
+ * TODO:
+ * thin, cache, integrity, vdo etc.
+ */
+static bool _lv_is_available(const struct logical_volume *lv)
+{
+ int s, missing_pv = 0, exist_pv = 0;
+ bool ret = true;
+ struct lv_segment *seg = NULL;
+
+ /* see comment, return directly */
+ if (seg_is_mirror(first_seg(lv))) {
+ ret = true;
+ goto out;
+ }
+
+ dm_list_iterate_items(seg, &lv->segments) {
+ for (s = 0; s < seg->area_count; ++s) {
+ if (seg_type(seg, s) == AREA_LV) {
+ if (seg_lv(seg, s)->status & PARTIAL_LV)
+ missing_pv++;
+ else
+ exist_pv++;
+ } else if (seg_type(seg, s) == AREA_PV) {
+ if (is_missing_pv(seg_pv(seg, s)))
+ missing_pv++;
+ else
+ exist_pv++;
+ }
+ }
+ }
+
+ log_print("missing pv: %d exist pv: %d", missing_pv, exist_pv);
+ seg = first_seg(lv);
+ if (seg_is_linear(seg)) {
+ ret = missing_pv ? false : true;
+ goto out;
+ }
+ if (seg_is_any_raid0(seg)) {
+ ret = missing_pv ? false : true;
+ goto out;
+ }
+ if (seg_is_raid1(seg)) {
+ ret = exist_pv ? true : false;
+ goto out;
+ }
+ if (seg_is_any_raid10(seg)) {
+ ret = (missing_pv > 1) ? false : true;
+ goto out;
+ }
+ if (seg_is_raid4(seg)) {
+ ret = (missing_pv > 1) ? false : true;
+ goto out;
+ }
+ if (seg_is_any_raid5(seg)) {
+ ret = (missing_pv > 1) ? false : true;
+ goto out;
+ }
+ if (seg_is_any_raid6(seg)) {
+ ret = (missing_pv > 2) ? false : true;
+ goto out;
+ }
+
+out:
+ return ret;
+}
+
static int _lv_mark_if_partial_single(struct logical_volume *lv, void *data)
{
unsigned s;
@@ -2052,8 +2138,10 @@ static int _lv_mark_if_partial_single(struct
logical_volume *lv, void *data)
dm_list_iterate_items(lvseg, &lv->segments) {
for (s = 0; s < lvseg->area_count; ++s) {
if (seg_type(lvseg, s) == AREA_PV) {
- if (is_missing_pv(seg_pv(lvseg, s)))
+ if (is_missing_pv(seg_pv(lvseg, s))) {
lv->status |= PARTIAL_LV;
+ lv->status |= NOT_AVAIL_LV;
+ }
}
}
}
@@ -2061,8 +2149,11 @@ static int _lv_mark_if_partial_single(struct
logical_volume *lv, void *data)
if (!_lv_each_dependency(lv, _lv_mark_if_partial_collect, &baton))
return_0;
- if (baton.partial)
+ if (baton.partial) {
lv->status |= PARTIAL_LV;
+ if (_lv_is_available(lv))
+ lv->status |= NOT_AVAIL_LV;
+ }
return 1;
}
diff --git a/lib/metadata/segtype.h b/lib/metadata/segtype.h
index 1a840707d..08ddc3565 100644
--- a/lib/metadata/segtype.h
+++ b/lib/metadata/segtype.h
@@ -326,7 +326,6 @@ struct segment_type *init_unknown_segtype(struct
cmd_context *cmd,
#ifdef RAID_INTERNAL
int init_raid_segtypes(struct cmd_context *cmd, struct segtype_library
*seglib);
-bool raid_is_available(const struct logical_volume *lv);
#endif
#define THIN_FEATURE_DISCARDS (1U << 0)
diff --git a/lib/raid/raid.c b/lib/raid/raid.c
index 4ed77e9a8..e88a15408 100644
--- a/lib/raid/raid.c
+++ b/lib/raid/raid.c
@@ -25,60 +25,6 @@
#include "lib/metadata/metadata.h"
#include "lib/metadata/lv_alloc.h"
-/*
- * below case think as available, return true:
- * - raid 1: at least 1 disk live
- * - raid 10: loose 1 disk
- * - raid 4/5: loose 1 disk
- * - raid 6: loose 2 disk
- *
- * raid 0: if there is any disk loose, return false
- * */
-bool raid_is_available(const struct logical_volume *lv)
-{
- int s, missing_pv = 0, exist_pv = 0;
- bool ret = true;
- struct lv_segment *seg = NULL;
-
- dm_list_iterate_items(seg, &lv->segments) {
- for (s = 0; s < seg->area_count; ++s) {
- if (seg_type(seg, s) == AREA_LV) {
- if (seg_lv(seg, s)->status & PARTIAL_LV)
- missing_pv++;
- else
- exist_pv++;
- }
- }
- }
- if (seg_is_any_raid0(first_seg(lv))){
- ret = missing_pv ? false : true;
- goto out;
- }
- if (seg_is_raid1(first_seg(lv))){
- ret = exist_pv ? true : false;
- goto out;
- }
- if (seg_is_any_raid10(first_seg(lv))) {
- ret = (missing_pv > 1) ? false : true;
- goto out;
- }
- if (seg_is_raid4(first_seg(lv))) {
- ret = (missing_pv > 1) ? false : true;
- goto out;
- }
- if (seg_is_any_raid5(first_seg(lv))) {
- ret = (missing_pv > 1) ? false : true;
- goto out;
- }
- if (seg_is_any_raid6(first_seg(lv))) {
- ret = (missing_pv > 2) ? false : true;
- goto out;
- }
-
-out:
- return ret;
-}
-
static int _raid_target_present(struct cmd_context *cmd,
const struct lv_segment *seg
__attribute__((unused)),
unsigned *attributes);
--
2.27.0
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