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

Initial code for read/write of thin metadata lv segments

Browse Source
This commit is contained in:
Zdenek Kabelac 2011-08-26 13:37:47 +00:00
parent 9d32170d5c
commit e82bd6249b
2 changed files with 74 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
lib/metadata/metadata-exported.h
View File

@ -318,6 +318,13 @@ struct lv_segment {
struct lv_segment_area *areas;
struct lv_segment_area *meta_areas; /* For RAID */
struct logical_volume *data_lv; /* For thin_pool */
struct logical_volume *metadata_lv; /* For thin_pool */
uint64_t transaction_id; /* For thin_pool */
uint32_t zero_new_blocks; /* For thin_pool */
struct logical_volume *thin_pool_lv; /* For thin */
struct logical_volume *origin_lv; /* For thin */
uint64_t device_id; /* For thin */
struct logical_volume *replicator;/* For replicator-devs - link to replicator LV */
struct logical_volume *rlog_lv; /* For replicators */

68
lib/thin/thin.c
View File

@ -30,20 +30,58 @@
/* Dm kernel module name for thin provisiong */
#define THIN_MODULE "thin-pool"
/*
* Macro used as return argument - returns 0.
* return is left to be written in the function for better readability.
*/
#define SEG_LOG_ERROR(t, p...) \
log_error(t " segment %s of logical volume %s.", ## p, \
config_parent_name(sn), seg->lv->name), 0;
static const char *_thin_pool_name(const struct lv_segment *seg)
{
return seg->segtype->name;
}
static int _thin_pool_text_import(struct lv_segment *seg, const struct config_node *sn,
struct dm_hash_table *pv_hash __attribute__((unused)))
{
const struct config_node *cn;
if (!(cn = find_config_node(sn, "data")) ||
!cn->v || cn->v->type != CFG_STRING)
return SEG_LOG_ERROR("Thin pool data must be a string in");
if (!(seg->data_lv = find_lv(seg->lv->vg, cn->v->v.str)))
return SEG_LOG_ERROR("Unknown pool data %s in",
cn->v->v.str);
if (!(cn = find_config_node(sn, "metadata")) ||
!cn->v || cn->v->type != CFG_STRING)
return SEG_LOG_ERROR("Thin pool metadata must be a string in");
if (!(seg->metadata_lv = find_lv(seg->lv->vg, cn->v->v.str)))
return SEG_LOG_ERROR("Unknown pool metadata %s in",
cn->v->v.str);
if (!get_config_uint64(sn, "transaction_id", &seg->transaction_id))
return SEG_LOG_ERROR("Could not read transaction_id for");
if (find_config_node(sn, "zero_new_blocks") &&
!get_config_uint32(sn, "zero_new_blocks", &seg->zero_new_blocks))
return SEG_LOG_ERROR("Could not read zero_new_blocks for");
return 1;
}
static int _thin_pool_text_export(const struct lv_segment *seg, struct formatter *f)
{
outf(f, "data = \"%s\"", seg->data_lv->name);
outf(f, "metadata = \"%s\"", seg->metadata_lv->name);
outf(f, "transaction_id = %" PRIu64, seg->transaction_id);
if (seg->zero_new_blocks)
outf(f, "zero_new_blocks = 1");
return 1;
}
@ -55,11 +93,39 @@ static const char *_thin_name(const struct lv_segment *seg)
static int _thin_text_import(struct lv_segment *seg, const struct config_node *sn,
struct dm_hash_table *pv_hash __attribute__((unused)))
{
const struct config_node *cn;
if (!(cn = find_config_node(sn, "thin_pool")) ||
!cn->v || cn->v->type != CFG_STRING)
return SEG_LOG_ERROR("Thin pool must be a string in");
if (!(seg->thin_pool_lv = find_lv(seg->lv->vg, cn->v->v.str)))
return SEG_LOG_ERROR("Unknown thin pool %s in",
cn->v->v.str);
if ((cn = find_config_node(sn, "origin"))) {
if (!cn->v || cn->v->type != CFG_STRING)
return SEG_LOG_ERROR("Thin pool origin must be a string in");
if (!(seg->origin_lv = find_lv(seg->lv->vg, cn->v->v.str)))
return SEG_LOG_ERROR("Unknown origin %s in",
cn->v->v.str);
}
if (!get_config_uint64(sn, "device_id", &seg->device_id))
return SEG_LOG_ERROR("Could not read device_id for");
return 1;
}
static int _thin_text_export(const struct lv_segment *seg, struct formatter *f)
{
outf(f, "thin_pool = \"%s\"", seg->thin_pool_lv->name);
outf(f, "device_id = %" PRIu64, seg->device_id);
if (seg->origin_lv)
outf(f, "origin = \"%s\"", seg->origin_lv->name);
return 1;
}