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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

28
zdev/include/misc.h
View File

@@ -19,9 +19,14 @@
#include "exit_code.h"
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
#define SCOPE_ACTIVE(x) (((x) == config_active) || ((x) == config_all))
#define SCOPE_PERSISTENT(x) (((x) == config_persistent) || \
((x) == config_all))
#define SCOPE_ACTIVE(x) ((x) & config_active ? 1 : 0)
#define SCOPE_PERSISTENT(x) ((x) & config_persistent ? 1 : 0)
#define SCOPE_AUTOCONF(x) ((x) & config_autoconf ? 1 : 0)
#define SCOPE_ALL(x) ((x) == (config_active | config_persistent |\
config_autoconf))
#define SCOPE_SINGLE(x) ((x) == config_active || \
(x) == config_persistent || \
(x) == config_autoconf)
#define DELAY_INDENT 4
@@ -34,12 +39,15 @@
#define EVEN(x) (((x) & 1) == 0)
/* Enumeration of configuration sets. */
typedef enum {
config_active,
config_persistent,
config_all,
} config_t;
/* Enumeration of configuration sets. Multiple configuration sets can be
* combined using bit-wise or. */
enum {
config_active = 1,
config_persistent = 2,
config_autoconf = 4,
config_all = 7,
};
typedef int config_t;
typedef enum {
err_ignore,
@@ -167,7 +175,7 @@ exit_code_t misc_write_text_file(const char *, const char *, err_t);
exit_code_t misc_write_text_file_retry(const char *, const char *, err_t);
exit_code_t misc_mktemp(char **, int *);
char *misc_readlink(const char *path);
config_t get_config(int, int);
config_t get_config(int act, int pers, int ac);
bool is_zvm(void);
bool is_terminal(void);
const char *config_to_str(config_t);