[lvm-devel] [PATCH 2/8] Refactor and add code for (lv) 'lv_origin' get function.
Petr Rockai
prockai at redhat.com
Wed Oct 20 21:41:40 UTC 2010
Dave Wysochanski <dwysocha at redhat.com> writes:
> Signed-off-by: Dave Wysochanski <dwysocha at redhat.com>
> --- a/lib/metadata/lv.c
> +++ b/lib/metadata/lv.c
> @@ -20,6 +20,13 @@
> #include "segtype.h"
> #include "str_list.h"
>
> +char *lv_origin_dup(struct dm_pool *mem, const struct logical_volume *lv)
> +{
> + if (lv_is_cow(lv))
> + return lv_name_dup(mem, origin_from_cow(lv));
> + return NULL;
> +}
> +
> char *lv_name_dup(struct dm_pool *mem, const struct logical_volume *lv)
> {
> return dm_pool_strdup(mem, lv->name);
> --- a/lib/metadata/lv.h
> +++ b/lib/metadata/lv.h
> @@ -61,5 +61,6 @@ int lv_kernel_minor(const struct logical_volume *lv);
> char *lv_mirror_log_dup(struct dm_pool *mem, const struct logical_volume *lv);
> char *lv_modules_dup(struct dm_pool *mem, const struct logical_volume *lv);
> char *lv_name_dup(struct dm_pool *mem, const struct logical_volume *lv);
> +char *lv_origin_dup(struct dm_pool *mem, const struct logical_volume *lv);
>
> #endif
> diff --git a/lib/report/properties.c b/lib/report/properties.c
> index 8228193..250c7c9 100644
> --- a/lib/report/properties.c
> +++ b/lib/report/properties.c
> @@ -121,7 +121,7 @@ GET_LV_NUM_PROPERTY_FN(lv_size, lv->size * SECTOR_SIZE)
> #define _lv_size_set _not_implemented_set
> GET_LV_NUM_PROPERTY_FN(seg_count, dm_list_size(&lv->segments))
> #define _seg_count_set _not_implemented_set
> -#define _origin_get _not_implemented_get
> +GET_LV_STR_PROPERTY_FN(origin, lv_origin_dup(lv->vg->vgmem, lv))
> #define _origin_set _not_implemented_set
> GET_LV_NUM_PROPERTY_FN(origin_size, lv_origin_size(lv))
> #define _origin_size_set _not_implemented_set
> --- a/lib/report/report.c
> +++ b/lib/report/report.c
> @@ -356,9 +356,10 @@ static int _origin_disp(struct dm_report *rh, struct dm_pool *mem,
> const void *data, void *private)
> {
> const struct logical_volume *lv = (const struct logical_volume *) data;
> + const char *name;
>
> - if (lv_is_cow(lv))
> - return _lvname_disp(rh, mem, field, origin_from_cow(lv), private);
> + if ((name = lv_origin_dup(mem, lv)))
> + return dm_report_field_string(rh, field, &name);
>
> dm_report_field_set_value(field, "", NULL);
> return 1;
Now, this code is not equivalent for those cases where the origin is not
visible. I am not sure that can ever happen, though. I am also not sure
which behaviour is better. But it's something worth double-checking.
Other than this, looks OK.
Reviewed-by: Petr Rockai <prockai at redhat.com>
Yours,
Petr.
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