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Add Thin API for parsing thin status

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Add dm_get_status_thin_pool and dm_get_status_thin functions to
parse 'params' argument which is received via dm_get_next_target.

Returns filed structure allocated from given mempool.
This commit is contained in:
Zdenek Kabelac 2011-12-21 12:52:38 +00:00
parent 61158adbcf
commit 077c4d1a35
2 changed files with 71 additions and 0 deletions
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23
libdm/libdevmapper.h
View File

@ -238,6 +238,29 @@ void *dm_get_next_target(struct dm_task *dmt,
void *next, uint64_t *start, uint64_t *length,
char **target_type, char **params);
/* Parse params from STATUS call for thin_pool target */
struct dm_pool;
struct dm_status_thin_pool {
uint64_t transaction_id;
uint64_t used_meta_blocks;
uint64_t total_meta_blocks;
uint64_t used_data_blocks;
uint64_t total_data_blocks;
};
int dm_get_status_thin_pool(struct dm_pool *mem, const char *params,
struct dm_status_thin_pool **status);
/* Parse params from STATUS call for thin target */
struct dm_status_thin {
uint64_t mapped_sectors;
uint64_t highest_mapped_sector;
};
int dm_get_status_thin(struct dm_pool *mem, const char *params,
struct dm_status_thin **status);
/*
* Call this to actually run the ioctl.
*/

48
libdm/libdm-deptree.c
View File

@ -3030,6 +3030,54 @@ int dm_tree_node_add_thin_target(struct dm_tree_node *node,
return 1;
}
int dm_get_status_thin_pool(struct dm_pool *mem, const char *params,
struct dm_status_thin_pool **status)
{
struct dm_status_thin_pool *s;
if (!(s = dm_pool_zalloc(mem, sizeof(struct dm_status_thin_pool)))) {
log_error("Failed to allocate thin_pool status structure.");
return 0;
}
if (sscanf(params, "%" PRIu64 " %" PRIu64 "/%" PRIu64 " %" PRIu64 "/%" PRIu64,
&s->transaction_id,
&s->used_meta_blocks,
&s->total_meta_blocks,
&s->used_data_blocks,
&s->total_data_blocks) != 5) {
log_error("Failed to parse thin pool params: %s.", params);
return 0;
}
*status = s;
return 1;
}
int dm_get_status_thin(struct dm_pool *mem, const char *params,
struct dm_status_thin **status)
{
struct dm_status_thin *s;
if (!(s = dm_pool_zalloc(mem, sizeof(struct dm_status_thin)))) {
log_error("Failed to allocate thin status structure.");
return 0;
}
if (sscanf(params, "%" PRIu64 " %" PRIu64,
&s->mapped_sectors,
&s->highest_mapped_sector) != 2) {
log_error("Failed to parse thin params: %s.", params);
return 0;
}
*status = s;
return 1;
}
static int _add_area(struct dm_tree_node *node, struct load_segment *seg, struct dm_tree_node *dev_node, uint64_t offset)
{
struct seg_area *area;