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zdev: add --deconfigure-all function for chzdev

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Introduce --deconfigure-all feature, which will remove all available
settings from the mentioned device. A typical device can have 10
different site-specific settings, active settings, persistent
settings and sometimes auto-configured settings configured in it.
--deconfigure-all can be used to remove all of them with a single
command.

usage: 	chzdev -D <device-id>
	chzdev --deconfigure-all <device-id>

Reviewed-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Signed-off-by: Vineeth Vijayan <vneethv@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
This commit is contained in:
Vineeth Vijayan
2022-09-29 23:35:01 +02:00
committed by Jan Höppner
parent 34146c3f92
commit fa3dd0ec20
5 changed files with 138 additions and 26 deletions
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61
zdev/src/root.c
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@@ -83,23 +83,58 @@ static bool is_zdev_early_0(struct selected_dev_node *sel)
{
struct setting *s;
struct device *dev;
int i;
dev = device_list_find(sel->st->devices, sel->id, NULL);
if (!dev)
return false;
s = setting_list_find(dev->persistent.settings,
internal_attr_early.name);
if (!s)
for (i = 0; i < NUM_SITES; i++) {
s = setting_list_find(dev->site_specific[i].settings,
internal_attr_early.name);
if (!s)
return false;
if (s->specified && strcmp(s->value, "0") == 0)
return true;
}
return false;
}
/* When site-specific settings has zdev:early configured, it is not
* detected with the --by-attr functionality of select_devices. Instead
* we will have to iterate through each configuration and check if there
* is a zdev:early set in the device. This is usually applicable only in
* the case of deconfigure-all command, because, for all other commands
* we copy the settings-in-action to the persistent settings and do the
* processing there.
*/
static bool is_zdev_early_site(struct selected_dev_node *sel)
{
struct setting *s;
struct device *dev;
int i;
if (global_site_id != SITE_FALLBACK)
return false;
if (s->specified && strcmp(s->value, "0") == 0)
return true;
dev = device_list_find(sel->st->devices, sel->id, NULL);
if (!dev)
return false;
for (i = 0; i < NUM_SITES; i++) {
s = setting_list_find(dev->site_specific[i].settings,
internal_attr_early.name);
if (s)
return true;
}
return false;
}
/* Determine if initial RAM-disk needs updating. If so, run the corresponding
* scripts if available. */
exit_code_t initrd_check(bool all_pers)
exit_code_t initrd_check(bool all_pers, int site_validate)
{
struct util_list *selected, *params, *mod = strlist_new();
struct selected_dev_node *sel;
@@ -142,7 +177,12 @@ exit_code_t initrd_check(bool all_pers)
}
/* Finally add devices with zdev:early=1. */
select = select_opts_new();
strlist_add(&select->by_attr, "%s=1", INTERNAL_ATTR_EARLY);
/* If we need information from multiple site, we cannot use the by-attr
* functionality of select_devices function. Instead we have to iterate
* through individual devices and site settings to find the key.
*/
if (!site_validate)
strlist_add(&select->by_attr, "%s=1", INTERNAL_ATTR_EARLY);
select_devices(select, selected, 1, 0, 0,
config_active | config_persistent, scope_mandatory,
err_ignore);
@@ -162,7 +202,12 @@ check_mod:
/* Check devices. */
dev = device_list_find(sel->st->devices, sel->id, NULL);
if (dev && dev->persistent.exists &&
(device_needs_writing(dev, config_persistent) || force)) {
(device_needs_writing(dev, config_persistent) || force) &&
!site_validate) {
strlist_add(mod, "%s %s", dev->subtype->devname,
dev->id);
} else if (site_validate && is_zdev_early_site(sel) &&
device_needs_writing(dev, config_persistent)) {
strlist_add(mod, "%s %s", dev->subtype->devname,
dev->id);
}