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zdev: Add support for handling auto-configuration data

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Auto-configuration is the name of a new configuration target that is
supported by chzdev and lszdev besides the existing active and
persistent configuration targets. Directives created in this new
configuration are stored as udev rules in the /run/udev/rules.d
directory.

Auto-configuration directives are only in effect if there are no
directives for the same device in the user-provided persistent
configuration. This allows users to override auto-configuration
directives if necessary.

Due to the volatile nature of the /run directory, auto-configuration
directives are cleared on reboot. Therefore mechanisms that generate
auto-configuration directives must recreate them on every boot.

The lszdev tool displays auto-configuration data both in list view
as well as in detail view. Users can specify the new option --auto-conf
to only show data from this configuration target.

Mechanisms that generate automated configuration directives can use
chzdev together with the --auto-conf option to create the corresponding
udev rules.

Note: This change does not include a mechanism that generates
      auto-configuration directives.

Signed-off-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
This commit is contained in:
Peter Oberparleiter
2017-09-01 11:05:55 +02:00
committed by Jan Höppner
parent a86fb8b091
commit fe68ec513d
32 changed files with 911 additions and 286 deletions
Download Patch File Download Diff File Expand all files Collapse all files

22
zdev/include/subtype.h
View File

@@ -67,17 +67,22 @@ typedef exit_code_t (*subtype_cb_t)(struct subtype *st, const char *id,
*
* @exists_active: Check if device exists in active configuration
* @exists_persistent: Check if device exists in persistent configuration
* @exists_autoconf: Check if device exists in autoconf configuration
*
* @add_active_ids: Add IDs of all devices existing in active configuration to
* specified strlist
* @add_persistent_ids: Add IDs of all devices existing in persistent
* configuration to specified strlist
* @add_autoconf_ids: Add IDs of all devices existing in autoconf
* configuration to specified strlist
*
* @read_active: Read device configuration from active configuration
* @read_persistent: Read device configuration from persistent configuration
* @read_autoconf: Read device configuration from autoconf configuration
*
* @configure_active: Apply configuration to active configuration
* @configure_persistent: Apply configuration to persistent configuration
* @configure_autoconf: Apply configuration to autoconf configuration
*
* @check_pre_write: Optional: Determine if the given configuration is valid
* for the specified device. If not, emit warning messages
@@ -150,24 +155,33 @@ struct subtype {
bool (*exists_active)(struct subtype *, const char *);
bool (*exists_persistent)(struct subtype *, const char *);
bool (*exists_autoconf)(struct subtype *, const char *);
void (*add_active_ids)(struct subtype *, struct util_list *);
void (*add_persistent_ids)(struct subtype *,
struct util_list *);
void (*add_autoconf_ids)(struct subtype *,
struct util_list *);
exit_code_t (*read_active)(struct subtype *, struct device *,
read_scope_t);
exit_code_t (*read_persistent)(struct subtype *, struct device *,
read_scope_t);
exit_code_t (*read_autoconf)(struct subtype *, struct device *,
read_scope_t);
exit_code_t (*configure_active)(struct subtype *, struct device *);
exit_code_t (*configure_persistent)(struct subtype *,
struct device *);
exit_code_t (*configure_autoconf)(struct subtype *,
struct device *);
exit_code_t (*deconfigure_active)(struct subtype *,
struct device *);
exit_code_t (*deconfigure_persistent)(struct subtype *,
struct device *);
exit_code_t (*deconfigure_autoconf)(struct subtype *,
struct device *);
exit_code_t (*check_pre_configure)(struct subtype *,
struct device *, int, config_t);
@@ -217,23 +231,31 @@ void subtype_exit(struct subtype *);
bool subtype_device_exists_active(struct subtype *, const char *);
bool subtype_device_exists_persistent(struct subtype *, const char *);
bool subtype_device_exists_autoconf(struct subtype *st, const char *id);
void subtype_add_active_ids(struct subtype *, struct util_list *);
void subtype_add_persistent_ids(struct subtype *, struct util_list *);
void subtype_add_autoconf_ids(struct subtype *st, struct util_list *ids);
exit_code_t subtype_device_read_active(struct subtype *, struct device *,
read_scope_t);
exit_code_t subtype_device_read_persistent(struct subtype *, struct device *,
read_scope_t);
exit_code_t subtype_device_read_autoconf(struct subtype *st, struct device *dev,
read_scope_t scope);
exit_code_t subtype_device_configure_active(struct subtype *, struct device *);
exit_code_t subtype_device_configure_persistent(struct subtype *,
struct device *);
exit_code_t subtype_device_configure_autoconf(struct subtype *st,
struct device *dev);
exit_code_t subtype_device_deconfigure_active(struct subtype *,
struct device *);
exit_code_t subtype_device_deconfigure_persistent(struct subtype *st,
struct device *);
exit_code_t subtype_device_deconfigure_autoconf(struct subtype *st,
struct device *dev);
exit_code_t subtype_check_pre_configure(struct subtype *, struct device *, int,
config_t);