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Append z to lv_attr if new blocks will be zeroed.

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This commit is contained in:
Alasdair Kergon 2011-09-09 01:15:18 +00:00
parent dbb48de507
commit 5081181b5d
4 changed files with 13 additions and 3 deletions
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10
lib/metadata/lv.c
View File

@ -308,9 +308,10 @@ char *lv_attr_dup(struct dm_pool *mem, const struct logical_volume *lv)
{ {
percent_t snap_percent; percent_t snap_percent;
struct lvinfo info; struct lvinfo info;
struct lv_segment *seg;
char *repstr; char *repstr;
if (!(repstr = dm_pool_zalloc(mem, 8))) { if (!(repstr = dm_pool_zalloc(mem, 9))) {
log_error("dm_pool_alloc failed"); log_error("dm_pool_alloc failed");
return 0; return 0;
} }
@ -405,6 +406,13 @@ char *lv_attr_dup(struct dm_pool *mem, const struct logical_volume *lv)
else else
repstr[6] = '-'; repstr[6] = '-';
if ((lv_is_thin_volume(lv) && (seg = first_seg(lv)) && seg->pool_lv && (seg = first_seg(seg->pool_lv))) ||
(lv_is_thin_pool(lv) && (seg = first_seg(lv))) &&
seg->zero_new_blocks)
repstr[7] = 'z';
else
repstr[7] = '-';
out: out:
return repstr; return repstr;
} }

2
lib/metadata/metadata.h
View File

@ -372,7 +372,7 @@ struct pv_list *find_pv_in_pv_list(const struct dm_list *pl,
struct lv_segment *find_seg_by_le(const struct logical_volume *lv, uint32_t le); struct lv_segment *find_seg_by_le(const struct logical_volume *lv, uint32_t le);
/* Find pool LV segment given a thin pool data or metadata segment. */ /* Find pool LV segment given a thin pool data or metadata segment. */
struct lv_segment *find_pool_seg(struct lv_segment *seg); struct lv_segment *find_pool_seg(const struct lv_segment *seg);
/* /*
* Remove a dev_dir if present. * Remove a dev_dir if present.

2
lib/metadata/thin_manip.c
View File

@ -61,7 +61,7 @@ int detach_pool_lv(struct lv_segment *seg)
return remove_seg_from_segs_using_this_lv(seg->pool_lv, seg); return remove_seg_from_segs_using_this_lv(seg->pool_lv, seg);
} }
struct lv_segment *find_pool_seg(struct lv_segment *seg) struct lv_segment *find_pool_seg(const struct lv_segment *seg)
{ {
struct lv_segment *pool_seg; struct lv_segment *pool_seg;

2
man/lvs.8.in
View File

@ -94,6 +94,8 @@ for example, mirror images, mirror logs as well as mirrors themselves appear as
equivalents using the md raid kernel driver all appear as (r). equivalents using the md raid kernel driver all appear as (r).
Snapshots using the original device-mapper driver appear as (s); whereas Snapshots using the original device-mapper driver appear as (s); whereas
snapshots of thin volumes using the new thin provisioning driver appear as (t). snapshots of thin volumes using the new thin provisioning driver appear as (t).
.IP 8 3
Newly-allocated data blocks are overwritten with blocks of (z)eroes before use.
.RE .RE
.TP .TP
.I \-\-segments .I \-\-segments