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

raid: add reshape segtype flag support

Browse Source 
Prohibit activation of reshaping RaidLVs on incompatible
lvm2 runtime by storing e.g. 'raid5+RESHAPE' segment type
strings in the lvm2 metadata.  Incompatible runtime not
supporting reshaping won't be able to activate those thus
avoiding potential data corruption.

Any new non-reshaping lvconvert command will reset the
segment type string from 'raid5+RESHAPE' to 'raid5'.

See commits
0299a7af1e and
4141409eb0
for segtype flag support.
This commit is contained in:
Heinz Mauelshagen 2017-06-09 21:31:09 +02:00
parent 3055131784
commit 1c916ec5ff
3 changed files with 21 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
lib/format_text/flags.c
View File

@ -62,6 +62,7 @@ static const struct flag _lv_flags[] = {
{LOCKED, "LOCKED", STATUS_FLAG},
{LV_NOTSYNCED, "NOTSYNCED", STATUS_FLAG},
{LV_REBUILD, "REBUILD", STATUS_FLAG},
{LV_RESHAPE, "RESHAPE", SEGTYPE_FLAG},
{LV_RESHAPE_DELTA_DISKS_PLUS, "RESHAPE_DELTA_DISKS_PLUS", STATUS_FLAG},
{LV_RESHAPE_DELTA_DISKS_MINUS, "RESHAPE_DELTA_DISKS_MINUS", STATUS_FLAG},
{LV_REMOVE_AFTER_RESHAPE, "REMOVE_AFTER_RESHAPE", STATUS_FLAG},

5
lib/metadata/metadata-exported.h
View File

@ -142,7 +142,10 @@
#define LV_REMOVE_AFTER_RESHAPE UINT64_C(0x0400000000000000) /* LV needs to be removed after a shrinking reshape */
#define LV_METADATA_FORMAT UINT64_C(0x0800000000000000) /* LV has segments with metadata format */
/* Next unused flag: UINT64_C(0x1000000000000000) */
#define LV_RESHAPE UINT64_C(0x1000000000000000) /* Ongoing reshape (number of stripes, stripesize or raid algorithm change):
used as SEGTYPE_FLAG to prevent activation on old runtime */
/* Next unused flag: UINT64_C(0x2000000000000000) */
/* Format features flags */
#define FMT_SEGMENTS 0x00000001U /* Arbitrary segment params? */

17
lib/metadata/raid_manip.c
View File

@ -1637,6 +1637,8 @@ static int _lv_free_reshape_space_with_status(struct logical_volume *lv, enum al
} else if (where_it_was)
*where_it_was = alloc_none;
lv->status &= ~LV_RESHAPE;
return 1;
}
@ -1844,6 +1846,9 @@ static int _raid_reshape_add_images(struct logical_volume *lv,
seg->stripe_size = new_stripe_size;
/* Define image adding reshape (used as SEGTYPE_FLAG to avoid incompatible activations on old runtime) */
lv->status |= LV_RESHAPE;
return 1;
}
@ -1943,6 +1948,8 @@ static int _raid_reshape_remove_images(struct logical_volume *lv,
if (seg_is_any_raid5(seg) && new_image_count == 2)
seg->data_copies = 2;
/* Define image removing reshape (used as SEGTYPE_FLAG to avoid incompatible activations on old runtime) */
lv ->status |= LV_RESHAPE;
break;
case 1:
@ -1981,7 +1988,6 @@ static int _raid_reshape_remove_images(struct logical_volume *lv,
return 0;
seg->area_count = new_image_count;
break;
default:
@ -2054,6 +2060,9 @@ static int _raid_reshape_keep_images(struct logical_volume *lv,
seg->segtype = new_segtype;
/* Define stripesize/raid algorithm reshape (used as SEGTYPE_FLAG to avoid incompatible activations on old runtime) */
lv->status |= LV_RESHAPE;
return 1;
}
@ -2237,6 +2246,8 @@ static int _raid_reshape(struct logical_volume *lv,
return 0;
}
lv->status &= ~LV_RESHAPE; /* Reset any reshaping segtype flag */
dm_list_init(&removal_lvs);
/* No change in layout requested ? */
@ -6040,6 +6051,8 @@ static int _region_size_change_requested(struct logical_volume *lv, int yes, con
return 0;
}
lv->status &= ~LV_RESHAPE;
if (!lv_update_and_reload_origin(lv))
return_0;
@ -6291,6 +6304,8 @@ int lv_raid_convert(struct logical_volume *lv,
return 0;
}
lv->status &= ~LV_RESHAPE;
return takeover_fn(lv, new_segtype, yes, force, new_image_count, 0, new_stripes, stripe_size,
region_size, allocate_pvs);
}