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zdev: add site specific states for devices

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Currently zdev supports the configuration and maintenance of one single
persistent device state. With the introduction of sites, zdev should be
able to store, configure and maintaine NUM_SITES number of states in
the persistent configuration. This patch modifies the struct device and
adds a new site_specific device_state array, which stores the
persistent configuration for all the available sites.

Total number of available sites are configured with NUM_SITES. Where,
10 site-specific configurations and 1 common configuration.

1. during read, all site data is always read and update the
   site_specific[] array.
2. dev->persistent is a copy of dev->site_specific[global_site_id]
3. modifications are only done on dev->persistent, and during write
   dev->persistent overlays dev->site_specific[global_site_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
2022-09-11 22:14:37 +02:00
committed by Jan Höppner
parent 198c9fc052
commit d2317943c0
2 changed files with 25 additions and 0 deletions
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24
zdev/src/device.c
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@@ -29,6 +29,7 @@ struct device *device_new(struct subtype *st, const char *id)
{
struct device *dev;
struct namespace *ns = st->namespace;
int i;
dev = misc_malloc(sizeof(struct device));
dev->subtype = st;
@@ -44,12 +45,17 @@ struct device *device_new(struct subtype *st, const char *id)
dev->persistent.settings = setting_list_new();
dev->autoconf.settings = setting_list_new();
for (i = 0; i < NUM_SITES; i++)
dev->site_specific[i].settings = setting_list_new();
return dev;
}
/* Release all resources associated with the specified device. */
void device_free(struct device *dev)
{
int i;
if (!dev)
return;
free(dev->id);
@@ -57,12 +63,18 @@ void device_free(struct device *dev)
setting_list_free(dev->active.settings);
setting_list_free(dev->persistent.settings);
setting_list_free(dev->autoconf.settings);
for (i = 0; i < NUM_SITES; i++)
setting_list_free(dev->site_specific[i].settings);
free(dev);
}
/* Used for debugging. */
void device_print(struct device *dev, int level)
{
int i;
printf("%*sdevice at %p:\n", level, "", (void *) dev);
if (!dev)
return;
@@ -96,6 +108,18 @@ void device_print(struct device *dev, int level)
setting_list_print(dev->autoconf.settings, level + 8);
else
printf("%*s<none>\n", level + 8, "");
printf("%*spersistent-site-specific:\n", level + 4, "");
for (i = 0; i < NUM_SITES; i++) {
printf("%*sexists=%d mod=%d deconf=%d\n",
level + 8, "", dev->site_specific[i].exists,
dev->site_specific[i].modified,
dev->site_specific[i].deconfigured);
if (dev->site_specific[i].settings)
setting_list_print(dev->site_specific[i].settings, level + 8);
else
printf("%*s<none>\n", level + 8, "");
}
}
static const void *device_hash_get_id(void *dev_ptr)