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cleanup: access pool segs with check

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Add some minor checks after first_seg(lv).
Use direct check for thin pool segment.
Drop some unneeded {}
This commit is contained in:
Zdenek Kabelac 2013-06-14 22:02:12 +02:00
parent 5e19410d93
commit 5d73c0c674
3 changed files with 32 additions and 17 deletions
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30
lib/metadata/lv.c
View File

@ -170,7 +170,7 @@ uint64_t lvseg_chunksize(const struct lv_segment *seg)
if (lv_is_cow(seg->lv))
size = (uint64_t) find_cow(seg->lv)->chunk_size;
else if (lv_is_thin_pool(seg->lv))
else if (seg_is_thin_pool(seg))
size = (uint64_t) seg->chunk_size;
else
size = UINT64_C(0);
@ -254,14 +254,16 @@ char *lv_pool_lv_dup(struct dm_pool *mem, const struct logical_volume *lv)
char *lv_data_lv_dup(struct dm_pool *mem, const struct logical_volume *lv)
{
return lv_is_thin_pool(lv) ?
dm_pool_strdup(mem, seg_lv(first_seg(lv), 0)->name) : NULL;
struct lv_segment *seg = lv_is_thin_pool(lv) ? first_seg(lv) : NULL;
return seg ? dm_pool_strdup(mem, seg_lv(seg, 0)->name) : NULL;
}
char *lv_metadata_lv_dup(struct dm_pool *mem, const struct logical_volume *lv)
{
return lv_is_thin_pool(lv) ?
dm_pool_strdup(mem, first_seg(lv)->metadata_lv->name) : NULL;
struct lv_segment *seg = lv_is_thin_pool(lv) ? first_seg(lv) : NULL;
return seg ? dm_pool_strdup(mem, seg->metadata_lv->name) : NULL;
}
const char *lv_layer(const struct logical_volume *lv)
@ -310,27 +312,35 @@ char *lv_move_pv_dup(struct dm_pool *mem, const struct logical_volume *lv)
{
struct lv_segment *seg;
dm_list_iterate_items(seg, &lv->segments) {
dm_list_iterate_items(seg, &lv->segments)
if (seg->status & PVMOVE)
return dm_pool_strdup(mem, dev_name(seg_dev(seg, 0)));
}
return NULL;
}
uint64_t lv_origin_size(const struct logical_volume *lv)
{
struct lv_segment *seg;
if (lv_is_cow(lv))
return (uint64_t) find_cow(lv)->len * lv->vg->extent_size;
if (lv_is_thin_volume(lv) && first_seg(lv)->external_lv)
return first_seg(lv)->external_lv->size;
if (lv_is_thin_volume(lv) && (seg = first_seg(lv)) &&
seg->external_lv)
return seg->external_lv->size;
if (lv_is_origin(lv))
return lv->size;
return 0;
}
uint64_t lv_metadata_size(const struct logical_volume *lv)
{
return lv_is_thin_pool(lv) ? first_seg(lv)->metadata_lv->size : 0;
struct lv_segment *seg = lv_is_thin_pool(lv) ? first_seg(lv) : NULL;
return seg ? seg->metadata_lv->size : 0;
}
char *lv_path_dup(struct dm_pool *mem, const struct logical_volume *lv)

7
lib/metadata/thin_manip.c
View File

@ -378,7 +378,12 @@ struct logical_volume *find_pool_lv(struct logical_volume *lv)
{
struct lv_segment *seg;
if (!(seg = find_pool_seg(first_seg(lv))))
if (!(seg = first_seg(lv))) {
log_error("LV %s has no segment", lv->name);
return NULL;
}
if (!(seg = find_pool_seg(seg)))
return_NULL;
return seg->lv;

12
lib/report/report.c
View File

@ -277,10 +277,10 @@ static int _datalv_disp(struct dm_report *rh, struct dm_pool *mem __attribute__(
const void *data, void *private __attribute__((unused)))
{
const struct logical_volume *lv = (const struct logical_volume *) data;
const struct lv_segment *seg = lv_is_thin_pool(lv) ? first_seg(lv) : NULL;
if (lv_is_thin_pool(lv))
return _lvname_disp(rh, mem, field,
seg_lv(first_seg(lv), 0), private);
if (seg)
return _lvname_disp(rh, mem, field, seg_lv(seg, 0), private);
dm_report_field_set_value(field, "", NULL);
return 1;
@ -291,10 +291,10 @@ static int _metadatalv_disp(struct dm_report *rh, struct dm_pool *mem __attribut
const void *data, void *private __attribute__((unused)))
{
const struct logical_volume *lv = (const struct logical_volume *) data;
const struct lv_segment *seg = lv_is_thin_pool(lv) ? first_seg(lv) : NULL;
if (lv_is_thin_pool(lv))
return _lvname_disp(rh, mem, field,
first_seg(lv)->metadata_lv, private);
if (seg)
return _lvname_disp(rh, mem, field, seg->metadata_lv, private);
dm_report_field_set_value(field, "", NULL);
return 1;