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Code Releases Activity

o Another pass at the activation code

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This commit is contained in:
Joe Thornber 2001-11-07 11:51:42 +00:00
parent 4429597ece
commit 37ed70b9ea
2 changed files with 145 additions and 31 deletions
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153
lib/activate/activate.c
View File

@ -15,6 +15,49 @@ static void _build_lv_name(char *buffer, size_t s, struct logical_volume *lv)
snprintf(buffer, s, "%s_%s", lv->vg->name, lv->name);
}
struct dm_task *_setup_task(struct logical_volume *lv, int task)
{
char name[128];
struct dm_task *dmt;
if (!(dmt = dm_task_create(task))) {
stack;
return NULL;
}
_build_lv_name(name, sizeof(name), lv);
dm_task_set_name(dmt, name);
return dmt;
}
int lv_active(struct logical_volume *lv, int *result)
{
int r = 0;
struct dm_task *dmt;
if (!(dmt = _setup_task(lv, DM_DEVICE_INFO))) {
stack;
return 0;
}
if (!dm_task_run(dmt)) {
stack;
goto out;
}
if (!dm_task_exists(dmt, result)) {
stack;
goto out;
}
r = 1;
out:
dm_task_destroy(dmt);
return r;
}
/*
* Creates a target for the next contiguous run of
* extents.
@ -54,24 +97,17 @@ static int _emit_target(struct dm_task *dmt, struct logical_volume *lv,
return 1;
}
/* FIXME: Always display error msg */
/* FIXME: Create dev entry if required */
int lv_activate(struct logical_volume *lv)
int _load(struct logical_volume *lv, int task)
{
int r = 0;
uint32_t le = 0;
char name[128];
struct dm_task *dmt;
if (!(dmt = dm_task_create(DM_DEVICE_CREATE))) {
if (!(dmt = _setup_task(lv, task))) {
stack;
return 0;
}
_build_lv_name(name, sizeof(name), lv);
dm_task_set_name(dmt, name);
/*
* Merge adjacent extents.
*/
@ -91,32 +127,60 @@ int lv_activate(struct logical_volume *lv)
return r;
}
int activate_lvs_in_vg(struct volume_group *vg)
/* FIXME: Always display error msg */
/* FIXME: Create dev entry if required */
int lv_activate(struct logical_volume *lv)
{
struct list *lvh;
return _load(lv, DM_DEVICE_CREATE);
}
int done = 0;
int _suspend(struct logical_volume *lv, int sus)
{
int r;
struct dm_task *dmt;
int task = sus ? DM_DEVICE_SUSPEND : DM_DEVICE_RESUME;
list_iterate(lvh, &vg->lvs)
done += lv_activate(&list_item(lvh, struct lv_list)->lv);
if (!(dmt = _setup_task(lv, task))) {
stack;
return 0;
}
return done;
if (!(r = dm_task_run(dmt)))
log_err("Couldn't %s device '%s'", sus ? "suspend" : "resume",
lv->name);
dm_task_destroy(dmt);
return r;
}
int lv_reactivate(struct logical_volume *lv)
{
int r;
if (!_suspend(lv, 1)) {
stack;
return 0;
}
r = _load(lv, DM_DEVICE_RELOAD);
if (!_suspend(lv, 0)) {
stack;
return 0;
}
return r;
}
int lv_deactivate(struct logical_volume *lv)
{
int r;
char name[128];
struct dm_task *dmt;
if (!(dmt = dm_task_create(DM_DEVICE_REMOVE))) {
if (!(dmt = _setup_task(lv, DM_DEVICE_REMOVE))) {
stack;
return 0;
}
_build_lv_name(name, sizeof(name), lv);
dm_task_set_name(dmt, name);
if (!(r = dm_task_run(dmt)))
stack;
@ -124,6 +188,24 @@ int lv_deactivate(struct logical_volume *lv)
return r;
}
int activate_lvs_in_vg(struct volume_group *vg)
{
struct list *lvh;
struct logical_volume *lv;
int count = 0, exists;
list_iterate(lvh, &vg->lvs) {
lv = &(list_item(lvh, struct lv_list)->lv);
if (!lv_active(lv, &exists) || exists)
continue;
count += lv_activate(lv);
}
return count;
}
int lv_update_write_access(struct logical_volume *lv)
{
return 0;
@ -132,16 +214,37 @@ int lv_update_write_access(struct logical_volume *lv)
int deactivate_lvs_in_vg(struct volume_group *vg)
{
struct list *lvh;
struct logical_volume *lv;
int count = 0, exists;
int done = 0;
list_iterate(lvh, &vg->lvs) {
lv = &(list_item(lvh, struct lv_list)->lv);
list_iterate(lvh, &vg->lvs)
done += lv_deactivate(&list_item(lvh, struct lv_list)->lv);
if (!lv_active(lv, &exists) || exists)
continue;
return done;
count += lv_activate(lv);
}
return count;
}
int lvs_in_vg_activated(struct volume_group *vg)
{
return 0;
struct list *lvh;
struct logical_volume *lv;
int exists, count = 0;
list_iterate(lvh, &vg->lvs) {
lv = &(list_item(lvh, struct lv_list)->lv);
if (!lv_active(lv, &exists)) {
stack;
continue; /* FIXME: what is the right thing here ? */
}
count += exists ? 1 : 0;
}
return count;
}

23
lib/activate/activate.h
View File

@ -9,21 +9,32 @@
/* FIXME Snapshot handling? */
int lv_active(struct logical_volume *lv, int *result);
int lv_activate(struct logical_volume *lv);
int lv_reactivate(struct logical_volume *lv);
int lv_deactivate(struct logical_volume *lv);
/* Return number of LVs in the VG that are active */
/*
* Return number of LVs in the VG that are
* active
*/
int lvs_in_vg_activated(struct volume_group *vg);
/* Test for (lv->status & LVM_WRITE) */
/*
* Test for (lv->status & LVM_WRITE)
*/
int lv_update_write_access(struct logical_volume *lv);
/* Activate all LVs in the VG. Ignore any that are already active. */
/* Return number activated */
/*
* Activate all LVs in the VG. Ignore any that
* are already active. Return number
* activated.
*/
int activate_lvs_in_vg(struct volume_group *vg);
/* Deactivate all LVs in the VG */
/*
* Deactivate all LVs in the VG
*/
int deactivate_lvs_in_vg(struct volume_group *vg);
#endif