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o In go the populate functions.

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This commit is contained in:
Joe Thornber 2002-02-25 15:19:53 +00:00
parent fc28b60f9c
commit 999e584511
1 changed files with 143 additions and 0 deletions
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143
lib/activate/dev_manager.c
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@ -232,6 +232,148 @@ static int _info(const char *name, struct dm_info *info)
}
/*
* The functions that populate the table in a dm_task as part of
* a create/reload.
*/
/*
* Emit a target for a given segment.
* FIXME: tidy this function.
*/
static int _emit_target(struct dm_task *dmt, struct stripe_segment *seg)
{
char params[1024];
uint64_t esize = seg->lv->vg->extent_size;
uint32_t s, stripes = seg->stripes;
int w = 0, tw = 0, error = 0;
const char *no_space =
"Insufficient space to write target parameters.";
char *filler = "/dev/ioerror";
char *target;
if (stripes == 1) {
if (!seg->area[0].pv) {
target = "error";
error = 1;
}
else
target = "linear";
}
if (stripes > 1) {
target = "striped";
tw = lvm_snprintf(params, sizeof(params), "%u %u ",
stripes, seg->stripe_size);
if (tw < 0) {
log_err(no_space);
return 0;
}
w = tw;
}
if (!error) {
for (s = 0; s < stripes; s++, w += tw) {
if (!seg->area[s].pv)
tw = lvm_snprintf(
params + w, sizeof(params) - w,
"%s 0%s", filler,
s == (stripes - 1) ? "" : " ");
else
tw = lvm_snprintf(
params + w, sizeof(params) - w,
"%s %" PRIu64 "%s",
dev_name(seg->area[s].pv->dev),
(seg->area[s].pv->pe_start +
(esize * seg->area[s].pe)),
s == (stripes - 1) ? "" : " ");
if (tw < 0) {
log_err(no_space);
return 0;
}
}
}
log_very_verbose("Adding target: %" PRIu64 " %" PRIu64 " %s %s",
esize * seg->le, esize * seg->len,
target, params);
if (!dm_task_add_target(dmt, esize * seg->le, esize * seg->len,
target, params)) {
stack;
return 0;
}
return 1;
}
static int _populate_vanilla(struct dm_task *dmt, struct dev_layer *dl)
{
struct list *segh;
struct stripe_segment *seg;
struct logical_volume *lv = dl->lv;
list_iterate(segh, &lv->segments) {
seg = list_item(segh, struct stripe_segment);
if (!_emit_target(dmt, seg)) {
log_error("Unable to build table for '%s'", lv->name);
return 0;
}
}
return 1;
}
static int _populate_origin(struct dm_task *dmt, struct dev_layer *dl)
{
#if 0
char *org;
log_very_verbose("Adding target: 0 %" PRIu64 " snapshot-origin %s",
lv->size, buffer);
if (!dm_task_add_target(dmt, 0, lv->size, "snapshot-origin", buffer)) {
stack;
return 0;
}
return 1;
#else
return 0;
#endif
}
static int _populate_snapshot(struct dm_task *dmt, struct dev_layer *dl)
{
#if 0
char buffer[PATH_MAX * 2];
log_very_verbose("Generating devmapper parameters for %s "
"(top layer)", lv->name);
if (snprintf(buffer, sizeof(buffer), "%s/%s %s/%s P %d 128",
dm_dir(), origin, dm_dir(),
cow_device, chunk_size) == -1) {
stack;
return 0;
}
log_very_verbose("Adding target: 0 %" PRIu64 " snapshot %s",
lv->size, buffer);
if (!dm_task_add_target(dmt, 0, lv->size, "snapshot", buffer)) {
stack;
return 0;
}
return 1;
#else
return 0;
#endif
}
/*
* dev_manager implementation.
*/
@ -382,6 +524,7 @@ static int _expand_lv(struct dev_manager *dm, struct logical_volume *lv)
stack;
return 0;
}
dl->populate = _populate_vanilla;
if (!hash_insert(dm->layers, dl->name, dl)) {
stack;