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Code Releases Activity

o More dev_manager fns.

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This commit is contained in:
Joe Thornber 2002-02-25 16:53:12 +00:00
parent 9c42e035a0
commit c15334eb4e
1 changed files with 75 additions and 19 deletions
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94
lib/activate/dev_manager.c
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@ -8,6 +8,7 @@
#include "pool.h"
#include "hash.h"
#include "log.h"
#include "lvm-string.h"
#include <libdevmapper.h>
@ -591,7 +592,7 @@ void _emit(struct dev_layer *dl)
* Recurses through the tree, ensuring that devices are created
* in correct order.
*/
int _create(struct dev_manager *dm, struct dev_layer *dl)
int _create_rec(struct dev_manager *dm, struct dev_layer *dl)
{
struct list *sh;
struct dev_layer *dep;
@ -610,7 +611,7 @@ int _create(struct dev_manager *dm, struct dev_layer *dl)
return 0;
}
if (!_create(dm, dep)) {
if (!_create_rec(dm, dep)) {
stack;
return 0;
}
@ -638,24 +639,48 @@ int _create(struct dev_manager *dm, struct dev_layer *dl)
return 1;
}
/*
* The guts of the activation unit, this examines the device
* layers in the manager, and tries to issue the correct
* instructions to activate them in order.
*/
static int _execute(struct dev_manager *dm)
int _remove_rec(struct dev_manager *dm, struct dev_layer *dl)
{
struct list *sh;
struct dev_layer *dep;
char *name;
if (dl->info.exists && !_suspend(dl)) {
stack;
return 0;
}
list_iterate (sh, &dl->pre_create) {
name = list_item(sh, struct str_list)->str;
if (!(dep = hash_lookup(dm->layers, name))) {
log_err("Couldn't find device layer '%s'.", name);
return 0;
}
if (!_remove_rec(dm, dep)) {
stack;
return 0;
}
}
if (dl->info.exists && !_remove(dl)) {
stack;
return 0;
}
return 1;
}
static int _mark_dependants(struct dev_manager *dm)
{
struct hash_node *hn;
struct dev_layer *dl;
/*
* We need to make a list of top level devices, ie. those
* that have no entries in 'pre_create'.
*/
_clear_marks(dm);
/*
* Mark any dependents.
* Mark any dependants.
*/
hash_iterate (hn, dm->layers) {
dl = hash_get_data(dm->layers, hn);
@ -675,6 +700,29 @@ static int _execute(struct dev_manager *dm)
}
}
return 1;
}
/*
* The guts of the activation unit, this examines the device
* layers in the manager, and tries to issue the correct
* instructions to activate them in order.
*/
static int _execute(struct dev_manager *dm,
int (*cmd)(struct dev_manager *dm, struct dev_layer *dl))
{
struct hash_node *hn;
struct dev_layer *dl;
/*
* We need to make a list of top level devices, ie. those
* that have no entries in 'pre_create'.
*/
if (!_mark_dependants(dm)) {
stack;
return 0;
}
/*
* Now only top level devices will be unmarked.
*/
@ -682,7 +730,7 @@ static int _execute(struct dev_manager *dm)
dl = hash_get_data(dm->layers, hn);
if (!dl->mark)
_emit(dl);
cmd(dm, dl);
}
return 1;
@ -745,7 +793,7 @@ int dev_manager_activate(struct dev_manager *dm, struct logical_volume *lv)
return 0;
}
if (!_execute(dm)) {
if (!_execute(dm, _create_rec)) {
stack;
return 0;
}
@ -755,8 +803,17 @@ int dev_manager_activate(struct dev_manager *dm, struct logical_volume *lv)
int dev_manager_reactivate(struct dev_manager *dm, struct logical_volume *lv)
{
log_err("dev_manager_reactivate not implemented.");
return 0;
if (!_select_lv(dm, lv)) {
stack;
return 0;
}
if (!_execute(dm, _create_rec)) {
stack;
return 0;
}
return 1;
}
int dev_manager_deactivate(struct dev_manager *dm, struct logical_volume *lv)
@ -766,11 +823,10 @@ int dev_manager_deactivate(struct dev_manager *dm, struct logical_volume *lv)
return 0;
}
if (!_execute(dm)) {
if (!_execute(dm, _remove_rec)) {
stack;
return 0;
}
return 0;
}