settings.h File Reference

Configuration settings. More...

#include <stdint.h>
#include <ipxe/tables.h>
#include <ipxe/list.h>
#include <ipxe/refcnt.h>

Go to the source code of this file.

Data Structures
struct	setting
	A setting. More...
struct	settings_operations
	Settings block operations. More...
struct	settings
	A settings block. More...
struct	settings_scope
	A setting scope. More...
struct	setting_type
	A setting type. More...
struct	settings_applicator
	A settings applicator. More...
struct	builtin_setting
	A built-in setting. More...
struct	generic_settings
	A generic settings block. More...

Macros
#define	SETTINGS   __table ( struct setting, "settings" )
	Configuration setting table. More...
#define	__setting(setting_order, name)   __table_entry ( SETTINGS, setting_order.name )
	Declare a configuration setting. More...
#define	SETTING_NETDEV   01
	Network device settings. More...
#define	SETTING_NETDEV_EXTRA   02
	Network device additional settings. More...
#define	SETTING_IP4   03
	IPv4 settings. More...
#define	SETTING_IP4_EXTRA   04
	IPv4 additional settings. More...
#define	SETTING_IP6   05
	IPv6 settings. More...
#define	SETTING_IP6_EXTRA   06
	IPv6 additional settings. More...
#define	SETTING_IP   07
	IPv4 settings. More...
#define	SETTING_IP_EXTRA   08
	IPv4 additional settings. More...
#define	SETTING_BOOT   09
	Generic boot settings. More...
#define	SETTING_BOOT_EXTRA   10
	Generic boot additional settings. More...
#define	SETTING_SANBOOT   11
	SAN boot settings. More...
#define	SETTING_SANBOOT_EXTRA   12
	SAN boot additional settings. More...
#define	SETTING_HOST   13
	Host identity settings. More...
#define	SETTING_HOST_EXTRA   14
	Host identity additional settings. More...
#define	SETTING_AUTH   15
	Authentication settings. More...
#define	SETTING_AUTH_EXTRA   16
	Authentication additional settings. More...
#define	SETTING_CRYPTO   17
	Cryptography settings. More...
#define	SETTING_MISC   18
	Miscellaneous settings. More...
#define	SETTING_TYPES   __table ( struct setting_type, "setting_types" )
	Configuration setting type table. More...
#define	__setting_type   __table_entry ( SETTING_TYPES, 01 )
	Declare a configuration setting type. More...
#define	SETTINGS_APPLICATORS   __table ( struct settings_applicator, "settings_applicators" )
	Settings applicator table. More...
#define	__settings_applicator   __table_entry ( SETTINGS_APPLICATORS, 01 )
	Declare a settings applicator. More...
#define	BUILTIN_SETTINGS   __table ( struct builtin_setting, "builtin_settings" )
	Built-in settings table. More...
#define	__builtin_setting   __table_entry ( BUILTIN_SETTINGS, 01 )
	Declare a built-in setting. More...

Typedefs
typedef struct settings *(*	get_child_settings_t) (struct settings *settings, const char *name)
	A child settings block locator function. More...

Functions
	FILE_LICENCE (GPL2_OR_LATER_OR_UBDL)
int	generic_settings_store (struct settings *settings, const struct setting *setting, const void *data, size_t len)
	Store value of generic setting. More...
int	generic_settings_fetch (struct settings *settings, struct setting *setting, void *data, size_t len)
	Fetch value of generic setting. More...
void	generic_settings_clear (struct settings *settings)
	Clear generic settings block. More...
int	register_settings (struct settings *settings, struct settings *parent, const char *name)
	Register settings block. More...
void	unregister_settings (struct settings *settings)
	Unregister settings block. More...
struct settings *	settings_target (struct settings *settings)
	Redirect to target settings block. More...
int	setting_applies (struct settings *settings, const struct setting *setting)
	Check applicability of setting. More...
int	store_setting (struct settings *settings, const struct setting *setting, const void *data, size_t len)
	Store value of setting. More...
int	fetch_setting (struct settings *settings, const struct setting *setting, struct settings **origin, struct setting *fetched, void *data, size_t len)
	Fetch setting. More...
int	fetch_setting_copy (struct settings *settings, const struct setting *setting, struct settings **origin, struct setting *fetched, void **data)
	Fetch copy of setting. More...
int	fetch_raw_setting (struct settings *settings, const struct setting *setting, void *data, size_t len)
	Fetch value of setting. More...
int	fetch_raw_setting_copy (struct settings *settings, const struct setting *setting, void **data)
	Fetch value of setting. More...
int	fetch_string_setting (struct settings *settings, const struct setting *setting, char *data, size_t len)
	Fetch value of string setting. More...
int	fetch_string_setting_copy (struct settings *settings, const struct setting *setting, char **data)
	Fetch value of string setting. More...
int	fetch_ipv4_array_setting (struct settings *settings, const struct setting *setting, struct in_addr *inp, unsigned int count)
	Fetch value of IPv4 address setting. More...
int	fetch_ipv4_setting (struct settings *settings, const struct setting *setting, struct in_addr *inp)
	Fetch value of IPv4 address setting. More...
int	fetch_ipv6_array_setting (struct settings *settings, const struct setting *setting, struct in6_addr *inp, unsigned int count)
	Fetch value of IPv6 address setting. More...
int	fetch_ipv6_setting (struct settings *settings, const struct setting *setting, struct in6_addr *inp)
	Fetch value of IPv6 address setting. More...
int	fetch_int_setting (struct settings *settings, const struct setting *setting, long *value)
	Fetch value of signed integer setting. More...
int	fetch_uint_setting (struct settings *settings, const struct setting *setting, unsigned long *value)
	Fetch value of unsigned integer setting. More...
long	fetch_intz_setting (struct settings *settings, const struct setting *setting)
	Fetch value of signed integer setting, or zero. More...
unsigned long	fetch_uintz_setting (struct settings *settings, const struct setting *setting)
	Fetch value of unsigned integer setting, or zero. More...
int	fetch_uuid_setting (struct settings *settings, const struct setting *setting, union uuid *uuid)
	Fetch value of UUID setting. More...
void	clear_settings (struct settings *settings)
	Clear settings block. More...
int	setting_cmp (const struct setting *a, const struct setting *b)
	Compare two settings. More...
struct settings *	find_child_settings (struct settings *parent, const char *name)
	Find child settings block. More...
struct settings *	autovivify_child_settings (struct settings *parent, const char *name)
	Find or create child settings block. More...
const char *	settings_name (struct settings *settings)
	Return settings block name. More...
struct settings *	find_settings (const char *name)
	Find settings block. More...
struct setting *	find_setting (const char *name)
	Find predefined setting. More...
int	parse_setting_name (char *name, get_child_settings_t get_child, struct settings **settings, struct setting *setting)
	Parse setting name. More...
int	setting_name (struct settings *settings, const struct setting *setting, char *buf, size_t len)
	Return full setting name. More...
int	setting_format (const struct setting_type *type, const void *raw, size_t raw_len, char *buf, size_t len)
	Format setting value as a string. More...
int	setting_parse (const struct setting_type *type, const char *value, void *buf, size_t len)
	Parse formatted string to setting value. More...
int	setting_numerate (const struct setting_type *type, const void *raw, size_t raw_len, unsigned long *value)
	Convert setting value to number. More...
int	setting_denumerate (const struct setting_type *type, unsigned long value, void *buf, size_t len)
	Convert number to setting value. More...
int	fetchf_setting (struct settings *settings, const struct setting *setting, struct settings **origin, struct setting *fetched, char *buf, size_t len)
	Fetch formatted value of setting. More...
int	fetchf_setting_copy (struct settings *settings, const struct setting *setting, struct settings **origin, struct setting *fetched, char **value)
	Fetch copy of formatted value of setting. More...
int	storef_setting (struct settings *settings, const struct setting *setting, const char *value)
	Store formatted value of setting. More...
int	fetchn_setting (struct settings *settings, const struct setting *setting, struct settings **origin, struct setting *fetched, unsigned long *value)
	Fetch numeric value of setting. More...
int	storen_setting (struct settings *settings, const struct setting *setting, unsigned long value)
	Store numeric value of setting. More...
char *	expand_settings (const char *string)
	Expand variables within string. More...
const struct setting ip_setting	__setting (SETTING_IP4, ip)
const struct setting netmask_setting	__setting (SETTING_IP4, netmask)
const struct setting gateway_setting	__setting (SETTING_IP4, gateway)
const struct setting dns_setting	__setting (SETTING_IP4_EXTRA, dns)
const struct setting ip6_setting	__setting (SETTING_IP6, ip6)
const struct setting len6_setting	__setting (SETTING_IP6, len6)
const struct setting gateway6_setting	__setting (SETTING_IP6, gateway6)
const struct setting hostname_setting	__setting (SETTING_HOST, hostname)
const struct setting domain_setting	__setting (SETTING_IP_EXTRA, domain)
const struct setting filename_setting	__setting (SETTING_BOOT, filename)
const struct setting root_path_setting	__setting (SETTING_SANBOOT, root-path)
const struct setting san_filename_setting	__setting (SETTING_SANBOOT, san-filename)
const struct setting username_setting	__setting (SETTING_AUTH, username)
const struct setting password_setting	__setting (SETTING_AUTH, password)
const struct setting priority_setting	__setting (SETTING_MISC, priority)
const struct setting uuid_setting	__setting (SETTING_HOST, uuid)
const struct setting next_server_setting	__setting (SETTING_BOOT, next-server)
const struct setting mac_setting	__setting (SETTING_NETDEV, mac)
const struct setting busid_setting	__setting (SETTING_NETDEV, busid)
const struct setting user_class_setting	__setting (SETTING_HOST_EXTRA, user-class)
const struct setting vendor_class_setting	__setting (SETTING_HOST_EXTRA, vendor-class)
const struct setting manufacturer_setting	__setting (SETTING_HOST_EXTRA, manufacturer)
const struct setting product_setting	__setting (SETTING_HOST_EXTRA, product)
const struct setting serial_setting	__setting (SETTING_HOST_EXTRA, serial)
const struct setting asset_setting	__setting (SETTING_HOST_EXTRA, asset)
const struct setting board_serial_setting	__setting (SETTING_HOST_EXTRA, board-serial)
const struct setting dhcp_server_setting	__setting (SETTING_MISC, dhcp-server)
static void	settings_init (struct settings *settings, struct settings_operations *op, struct refcnt *refcnt, const struct settings_scope *default_scope)
	Initialise a settings block. More...
static void	generic_settings_init (struct generic_settings *generics, struct refcnt *refcnt)
	Initialise a settings block. More...
static int	delete_setting (struct settings *settings, const struct setting *setting)
	Delete setting. More...
static int	setting_exists (struct settings *settings, const struct setting *setting)
	Check existence of predefined setting. More...

Variables
const struct settings_scope	builtin_scope
	Built-in setting scope. More...
const struct settings_scope	ipv6_settings_scope
	IPv6 setting scope. More...
const struct settings_scope	dhcpv6_scope
	DHCPv6 setting scope. More...
struct settings_operations	generic_settings_operations
	Generic settings operations. More...
const struct setting_type setting_type_string	__setting_type
	A string setting type. More...

Detailed Description

Configuration settings.

Definition in file settings.h.

Macro Definition Documentation

SETTINGS

#define SETTINGS   __table ( struct setting, "settings" )

Configuration setting table.

Definition at line 53 of file settings.h.

__setting

#define __setting	(		setting_order,
			name
	)		__table_entry ( SETTINGS, setting_order.name )

Declare a configuration setting.

Definition at line 56 of file settings.h.

SETTING_TYPES

#define SETTING_TYPES   __table ( struct setting_type, "setting_types" )

Configuration setting type table.

Definition at line 242 of file settings.h.

__setting_type

const struct setting_type setting_type_dnssl __setting_type   __table_entry ( SETTING_TYPES, 01 )

Declare a configuration setting type.

PCI bus:dev.fn setting type.

GUID setting type.

UUID setting type.

A Base64-encoded setting.

A hex-string setting (non-delimited)

A hex-string setting (hyphen-delimited)

A hex-string setting (colon-delimited)

An unsigned 32-bit integer setting type.

An unsigned 16-bit integer setting type.

An unsigned 8-bit integer setting type.

A signed 32-bit integer setting type.

A signed 16-bit integer setting type.

A signed 8-bit integer setting type.

An IPv6 address setting type.

An IPv4 address setting type.

A URI-encoded string setting type.

Definition at line 245 of file settings.h.

SETTINGS_APPLICATORS

#define SETTINGS_APPLICATORS   __table ( struct settings_applicator, "settings_applicators" )

Settings applicator table.

Definition at line 260 of file settings.h.

__settings_applicator

#define __settings_applicator   __table_entry ( SETTINGS_APPLICATORS, 01 )

Declare a settings applicator.

Definition at line 264 of file settings.h.

BUILTIN_SETTINGS

#define BUILTIN_SETTINGS   __table ( struct builtin_setting, "builtin_settings" )

Built-in settings table.

Definition at line 280 of file settings.h.

__builtin_setting

struct builtin_setting unixtime_builtin_setting __builtin_setting   __table_entry ( BUILTIN_SETTINGS, 01 )

Declare a built-in setting.

Current time built-in setting.

Version built-in setting.

Platform built-in setting.

Build architecture built-in setting.

Definition at line 283 of file settings.h.

Typedef Documentation

get_child_settings_t

typedef struct settings*( * get_child_settings_t) (struct settings *settings, const char *name)

A child settings block locator function.

Definition at line 306 of file settings.h.

Function Documentation

FILE_LICENCE()

FILE_LICENCE

(

GPL2_OR_LATER_OR_UBDL

)

generic_settings_store()

int generic_settings_store	(	struct settings *	settings,
		const struct setting *	setting,
		const void *	data,
		size_t	len
	)

Store value of generic setting.

Parameters

settings	Settings block
setting	Setting to store
data	Setting data, or NULL to clear setting
len	Length of setting data

Return values

rc	Return status code

Definition at line 126 of file settings.c.

                                                            {
        struct generic_settings *generics =
                container_of ( settings, struct generic_settings, settings );
        struct generic_setting *old;
        struct generic_setting *new = NULL;
        size_t name_len;

        /* Identify existing generic setting, if any */
        old = find_generic_setting ( generics, setting );

        /* Create new generic setting, if required */
        if ( len ) {
                /* Allocate new generic setting */
                name_len = ( strlen ( setting->name ) + 1 );
                new = zalloc ( sizeof ( *new ) + name_len + len );
                if ( ! new )
                        return -ENOMEM;

                /* Populate new generic setting */
                new->name_len = name_len;
                new->data_len = len;
                memcpy ( &new->setting, setting, sizeof ( new->setting ) );
                new->setting.name = generic_setting_name ( new );
                memcpy ( generic_setting_name ( new ),
                         setting->name, name_len );
                memcpy ( generic_setting_data ( new ), data, len );
        }

        /* Delete existing generic setting, if any */
        if ( old ) {
                list_del ( &old->list );
                free ( old );
        }

        /* Add new setting to list, if any */
        if ( new )
                list_add ( &new->list, &generics->list );

        return 0;
}

References container_of, data, ENOMEM, find_generic_setting(), free, generic_setting_data(), generic_setting_name(), len, generic_settings::list, list_add, list_del, memcpy(), setting::name, generic_setting::name_len, NULL, old, strlen(), and zalloc().

Referenced by netdev_store().

generic_settings_fetch()

int generic_settings_fetch	(	struct settings *	settings,
		struct setting *	setting,
		void *	data,
		size_t	len
	)

Fetch value of generic setting.

Parameters

settings	Settings block
setting	Setting to fetch
data	Buffer to fill with setting data
len	Length of buffer

Return values

len	Length of setting data, or negative error

Definition at line 178 of file settings.c.

                                                      {
        struct generic_settings *generics =
                container_of ( settings, struct generic_settings, settings );
        struct generic_setting *generic;

        /* Find generic setting */
        generic = find_generic_setting ( generics, setting );
        if ( ! generic )
                return -ENOENT;

        /* Copy out generic setting data */
        if ( len > generic->data_len )
                len = generic->data_len;
        memcpy ( data, generic_setting_data ( generic ), len );

        /* Set setting type, if not yet specified */
        if ( ! setting->type )
                setting->type = generic->setting.type;

        return generic->data_len;
}

References container_of, data, ENOENT, find_generic_setting(), generic, generic_setting_data(), len, memcpy(), and setting::type.

Referenced by netdev_fetch().

generic_settings_clear()

void generic_settings_clear

(

struct settings *

settings

)

Clear generic settings block.

Parameters

settings

Settings block

Definition at line 207 of file settings.c.

                                                          {
        struct generic_settings *generics =
                container_of ( settings, struct generic_settings, settings );
        struct generic_setting *generic;
        struct generic_setting *tmp;

        list_for_each_entry_safe ( generic, tmp, &generics->list, list ) {
                list_del ( &generic->list );
                free ( generic );
        }
        assert ( list_empty ( &generics->list ) );
}

References assert(), container_of, free, generic, generic_settings::list, generic_setting::list, list_del, list_empty, list_for_each_entry_safe, and tmp.

Referenced by autovivified_settings_free(), and netdev_clear().

register_settings()

int register_settings	(	struct settings *	settings,
		struct settings *	parent,
		const char *	name
	)

Register settings block.

Parameters

settings	Settings block
parent	Parent settings block, or NULL
name	Settings block name

Return values

rc	Return status code

Definition at line 475 of file settings.c.

                                           {
        struct settings *old_settings;

        /* Sanity check */
        assert ( settings != NULL );

        /* Find target parent settings block */
        parent = settings_target ( parent );

        /* Apply settings block name */
        settings->name = name;

        /* Remove any existing settings with the same name */
        if ( ( old_settings = find_child_settings ( parent, settings->name ) ))
                unregister_settings ( old_settings );

        /* Add to list of settings */
        ref_get ( settings->refcnt );
        ref_get ( parent->refcnt );
        settings->parent = parent;
        list_add_tail ( &settings->siblings, &parent->children );
        DBGC ( settings, "Settings %p (\"%s\") registered\n",
               settings, settings_name ( settings ) );

        /* Fix up settings priority */
        reprioritise_settings ( settings );

        /* Apply potentially-updated settings */
        apply_settings();

        return 0;
}

References apply_settings(), assert(), settings::children, DBGC, find_child_settings(), list_add_tail, settings::name, name, NULL, settings::parent, ref_get, settings::refcnt, reprioritise_settings(), settings_name(), settings_target(), settings::siblings, and unregister_settings().

Referenced by acpi_settings_init(), autovivify_child_settings(), builtin_init(), cachedhcp_apply(), cpuid_settings_init(), dhcp_proxy_rx(), dhcp_pxebs_rx(), dhcp_request_rx(), dhcpv6_register(), guestinfo_init(), guestinfo_net_probe(), ipv6_register_settings(), lldp_probe(), memmap_settings_init(), ndp_register_settings(), netdev_redirect_settings_init(), pci_settings_init(), phantom_probe(), register_netdev(), register_nvo(), settings_test_exec(), and smbios_init().

unregister_settings()

void unregister_settings

(

struct settings *

settings

)

Unregister settings block.

Parameters

settings

Settings block

Definition at line 514 of file settings.c.

                                                       {
        struct settings *child;

        /* Unregister child settings */
        while ( ( child = list_first_entry ( &settings->children,
                                             struct settings, siblings ) ) ) {
                unregister_settings ( child );
        }

        DBGC ( settings, "Settings %p (\"%s\") unregistered\n",
               settings, settings_name ( settings ) );

        /* Remove from list of settings */
        ref_put ( settings->parent->refcnt );
        settings->parent = NULL;
        list_del ( &settings->siblings );
        ref_put ( settings->refcnt );

        /* Apply potentially-updated settings */
        apply_settings();
}

References apply_settings(), settings::children, DBGC, list_del, list_first_entry, NULL, settings::parent, ref_put, settings::refcnt, settings_name(), settings::siblings, and unregister_settings().

Referenced by dhcp_request_rx(), guestinfo_net_remove(), lldp_probe(), ndp_register_settings(), phantom_probe(), phantom_remove(), register_netdev(), register_settings(), settings_test_exec(), unregister_netdev(), unregister_nvo(), and unregister_settings().

settings_target()

struct settings* settings_target

(

struct settings *

settings

)

Redirect to target settings block.

Parameters

settings

Settings block, or NULL

Return values

settings

Underlying settings block

Definition at line 549 of file settings.c.

                                                                {

        /* NULL settings implies the global settings root */
        if ( ! settings )
                settings = &settings_root;

        /* Redirect to underlying settings block, if applicable */
        if ( settings->op->redirect )
                return settings->op->redirect ( settings );

        /* Otherwise, return this settings block */
        return settings;
}

References settings::op, settings_operations::redirect, and settings_root.

Referenced by autovivify_child_settings(), clear_settings(), fetch_setting(), find_child_settings(), register_settings(), select_settings(), setting_applies(), setting_name(), settings_name(), and store_setting().

setting_applies()

int setting_applies	(	struct settings *	settings,
		const struct setting *	setting
	)

Check applicability of setting.

Parameters

settings	Settings block
setting	Setting

Return values

applies

Setting applies within this settings block

Definition at line 570 of file settings.c.

                                                      {

        /* Find target settings block */
        settings = settings_target ( settings );

        /* Check applicability of setting */
        return ( settings->op->applies ?
                 settings->op->applies ( settings, setting ) : 1 );
}

References settings_operations::applies, settings::op, and settings_target().

Referenced by applicable_setting(), select_setting_row(), and store_setting().

store_setting()

int store_setting	(	struct settings *	settings,
		const struct setting *	setting,
		const void *	data,
		size_t	len
	)

Store value of setting.

Parameters

settings	Settings block, or NULL
setting	Setting to store
data	Setting data, or NULL to clear setting
len	Length of setting data

Return values

rc	Return status code

Definition at line 615 of file settings.c.

                                                   {
        int rc;

        /* Find target settings block */
        settings = settings_target ( settings );

        /* Fail if setting does not apply to this settings block */
        if ( ! setting_applies ( settings, setting ) )
                return -ENOTTY;

        /* Sanity check */
        if ( ! settings->op->store )
                return -ENOTSUP;

        /* Store setting */
        if ( ( rc = settings->op->store ( settings, setting,
                                          data, len ) ) != 0 )
                return rc;

        /* Reprioritise settings if necessary */
        if ( setting_cmp ( setting, &priority_setting ) == 0 )
                reprioritise_settings ( settings );

        /* If these settings are registered, apply potentially-updated
         * settings
         */
        for ( ; settings ; settings = settings->parent ) {
                if ( settings == &settings_root ) {
                        apply_settings();
                        break;
                }
        }

        return 0;
}

References apply_settings(), data, ENOTSUP, ENOTTY, len, settings::op, settings::parent, rc, reprioritise_settings(), setting_applies(), setting_cmp(), settings_root, settings_target(), and settings_operations::store.

Referenced by delete_setting(), login_ui(), nslookup_resolv_done(), storef_setting(), and storen_setting().

fetch_setting()

int fetch_setting	(	struct settings *	settings,
		const struct setting *	setting,
		struct settings **	origin,
		struct setting *	fetched,
		void *	data,
		size_t	len
	)

Fetch setting.

Parameters

settings	Settings block, or NULL to search all blocks
setting	Setting to fetch
origin	Origin of setting to fill in, or NULL
fetched	Fetched setting to fill in, or NULL
data	Buffer to fill with setting data
len	Length of buffer

Return values

len	Length of setting data, or negative error

The actual length of the setting will be returned even if the buffer was too small.

Definition at line 666 of file settings.c.

                                             {
        const struct setting *applicable;
        struct settings *child;
        struct setting tmp;
        int ret;

        /* Avoid returning uninitialised data on error */
        memset ( data, 0, len );
        if ( origin )
                *origin = NULL;
        if ( fetched )
                memcpy ( fetched, setting, sizeof ( *fetched ) );

        /* Find target settings block */
        settings = settings_target ( settings );

        /* Sanity check */
        if ( ! settings->op->fetch )
                return -ENOTSUP;

        /* Try this block first, if an applicable setting exists */
        if ( ( applicable = applicable_setting ( settings, setting ) ) ) {

                /* Create modifiable copy of setting */
                memcpy ( &tmp, applicable, sizeof ( tmp ) );
                if ( ( ret = settings->op->fetch ( settings, &tmp,
                                                   data, len ) ) >= 0 ) {

                        /* Default to string type, if not yet specified */
                        if ( ! tmp.type )
                                tmp.type = &setting_type_string;

                        /* Record origin, if applicable */
                        if ( origin )
                                *origin = settings;

                        /* Record fetched setting, if applicable */
                        if ( fetched )
                                memcpy ( fetched, &tmp, sizeof ( *fetched ) );

                        return ret;
                }
        }

        /* Recurse into each child block in turn */
        list_for_each_entry ( child, &settings->children, siblings ) {
                if ( ( ret = fetch_setting ( child, setting, origin, fetched,
                                             data, len ) ) >= 0 )
                        return ret;
        }

        return -ENOENT;
}

References applicable_setting(), settings::children, data, ENOENT, ENOTSUP, settings_operations::fetch, fetch_setting(), len, list_for_each_entry, memcpy(), memset(), NULL, settings::op, origin, settings_target(), and tmp.

Referenced by fetch_next_server_and_filename(), fetch_raw_setting(), fetch_setting(), fetch_setting_alloc(), ibft_fill_nic(), ibft_set_string_setting(), ipv6_create_routes(), and setting_exists().

fetch_setting_copy()

int fetch_setting_copy	(	struct settings *	settings,
		const struct setting *	setting,
		struct settings **	origin,
		struct setting *	fetched,
		void **	data
	)

Fetch copy of setting.

Parameters

settings	Settings block, or NULL to search all blocks
setting	Setting to fetch
origin	Origin of setting to fill in, or NULL
fetched	Fetched setting to fill in, or NULL
data	Buffer to allocate and fill with setting data

Return values

len	Length of setting, or negative error

The caller is responsible for eventually freeing the allocated buffer.

Definition at line 785 of file settings.c.

                                       {

        return fetch_setting_alloc ( settings, setting, origin, fetched,
                                     data, malloc );
}

References data, fetch_setting_alloc(), malloc(), and origin.

Referenced by fetch_raw_setting_copy(), fetchf_setting(), and fetchn_setting().

fetch_raw_setting()

int fetch_raw_setting	(	struct settings *	settings,
		const struct setting *	setting,
		void *	data,
		size_t	len
	)

Fetch value of setting.

Parameters

settings	Settings block, or NULL to search all blocks
setting	Setting to fetch
data	Buffer to fill with setting string data
len	Length of buffer

Return values

len	Length of setting, or negative error

Definition at line 803 of file settings.c.

                                                 {

        return fetch_setting ( settings, setting, NULL, NULL, data, len );
}

References data, fetch_setting(), len, and NULL.

Referenced by dhcp_create_request(), dhcpv6_user_class(), fetch_ipv4_array_setting(), fetch_ipv6_array_setting(), fetch_numeric_setting(), fetch_string_setting(), fetch_uuid_setting(), pxe_menu_parse(), start_pxebs(), trivial_change_key(), and trivial_init().

fetch_raw_setting_copy()

int fetch_raw_setting_copy	(	struct settings *	settings,
		const struct setting *	setting,
		void **	data
	)

Fetch value of setting.

Parameters

settings	Settings block, or NULL to search all blocks
setting	Setting to fetch
data	Buffer to allocate and fill with setting data

Return values

len	Length of setting, or negative error

The caller is responsible for eventually freeing the allocated buffer.

Definition at line 821 of file settings.c.

                                           {

        return fetch_setting_copy ( settings, setting, NULL, NULL, data );
}

References data, fetch_setting_copy(), and NULL.

Referenced by apply_dns_search(), apply_dns_servers(), certstore_apply_settings(), copy_encap_settings(), dhcp_create_request(), privkey_apply_settings(), and rootcert_init().

fetch_string_setting()

int fetch_string_setting	(	struct settings *	settings,
		const struct setting *	setting,
		char *	data,
		size_t	len
	)

Fetch value of string setting.

Parameters

settings	Settings block, or NULL to search all blocks
setting	Setting to fetch
data	Buffer to fill with setting string data
len	Length of buffer

Return values

len	Length of string setting, or negative error

The resulting string is guaranteed to be correctly NUL-terminated. The returned length will be the length of the underlying setting data.

Definition at line 841 of file settings.c.

                                                    {

        memset ( data, 0, len );
        return fetch_raw_setting ( settings, setting, data,
                                   ( ( len > 0 ) ? ( len - 1 ) : 0 ) );
}

References data, fetch_raw_setting(), len, and memset().

Referenced by have_pxe_menu(), ib_sma_node_desc(), ibft_set_string_setting(), login_ui(), net80211_autoassociate(), net80211_check_settings_update(), wpa_psk_start(), and xsigo_xds_complete().

fetch_string_setting_copy()

int fetch_string_setting_copy	(	struct settings *	settings,
		const struct setting *	setting,
		char **	data
	)

Fetch value of string setting.

Parameters

settings	Settings block, or NULL to search all blocks
setting	Setting to fetch
data	Buffer to allocate and fill with setting string data

Return values

len	Length of string setting, or negative error

The resulting string is guaranteed to be correctly NUL-terminated. The returned length will be the length of the underlying setting data. The caller is responsible for eventually freeing the allocated buffer.

Definition at line 873 of file settings.c.

                                                                             {

        return fetch_setting_alloc ( settings, setting, NULL, NULL,
                                     ( ( void ** ) data ),
                                     fetch_string_setting_copy_alloc );
}

References data, fetch_setting_alloc(), fetch_string_setting_copy_alloc(), and NULL.

Referenced by apply_dns_search(), apply_peerdisc_settings(), apply_syslog_settings(), apply_syslogs_settings(), efi_veto(), fetch_next_server_and_filename(), fetch_root_path(), fetch_san_filename(), ipxe(), iscsi_fetch_settings(), keymap_apply(), oncrpc_init_cred_sys(), and validator_start_download().

fetch_ipv4_array_setting()

int fetch_ipv4_array_setting	(	struct settings *	settings,
		const struct setting *	setting,
		struct in_addr *	inp,
		unsigned int	count
	)

Fetch value of IPv4 address setting.

Parameters

settings	Settings block, or NULL to search all blocks
setting	Setting to fetch
inp	IPv4 addresses to fill in
count	Maximum number of IPv4 addresses

Return values

len	Length of setting, or negative error

Definition at line 890 of file settings.c.

                                                                         {
        int len;

        len = fetch_raw_setting ( settings, setting, inp,
                                  ( sizeof ( *inp ) * count ) );
        if ( len < 0 )
                return len;
        if ( ( len % sizeof ( *inp ) ) != 0 )
                return -ERANGE;
        return len;
}

References count, ERANGE, fetch_raw_setting(), and len.

Referenced by fetch_ipv4_setting(), and ibft_set_ipaddr_setting().

fetch_ipv4_setting()

int fetch_ipv4_setting	(	struct settings *	settings,
		const struct setting *	setting,
		struct in_addr *	inp
	)

Fetch value of IPv4 address setting.

Parameters

settings	Settings block, or NULL to search all blocks
setting	Setting to fetch
inp	IPv4 address to fill in

Return values

len	Length of setting, or negative error

Definition at line 912 of file settings.c.

                                               {

        return fetch_ipv4_array_setting ( settings, setting, inp, 1 );
}

References fetch_ipv4_array_setting().

Referenced by apply_syslog_settings(), create_fakepxebsack(), efi_pxe_install(), efi_pxe_ip(), fetch_next_server_and_filename(), gdbudp_configure(), ibft_fill_nic(), ipv4_settings(), start_pxebs(), and tftp_apply_settings().

fetch_ipv6_array_setting()

int fetch_ipv6_array_setting	(	struct settings *	settings,
		const struct setting *	setting,
		struct in6_addr *	inp,
		unsigned int	count
	)

Fetch value of IPv6 address setting.

Parameters

settings	Settings block, or NULL to search all blocks
setting	Setting to fetch
inp	IPv6 addresses to fill in
count	Maximum number of IPv6 addresses

Return values

len	Length of setting, or negative error

Definition at line 928 of file settings.c.

                                                                          {
        int len;

        len = fetch_raw_setting ( settings, setting, inp,
                                  ( sizeof ( *inp ) * count ) );
        if ( len < 0 )
                return len;
        if ( ( len % sizeof ( *inp ) ) != 0 )
                return -ERANGE;
        return len;
}

References count, ERANGE, fetch_raw_setting(), and len.

Referenced by fetch_ipv6_setting().

fetch_ipv6_setting()

int fetch_ipv6_setting	(	struct settings *	settings,
		const struct setting *	setting,
		struct in6_addr *	inp
	)

Fetch value of IPv6 address setting.

Parameters

settings	Settings block, or NULL to search all blocks
setting	Setting to fetch
inp	IPv6 address to fill in

Return values

len	Length of setting, or negative error

Definition at line 950 of file settings.c.

                                                {

        return fetch_ipv6_array_setting ( settings, setting, inp, 1 );
}

References fetch_ipv6_array_setting().

Referenced by apply_syslog_settings().

fetch_int_setting()

int fetch_int_setting	(	struct settings *	settings,
		const struct setting *	setting,
		long *	value
	)

Fetch value of signed integer setting.

Parameters

settings	Settings block, or NULL to search all blocks
setting	Setting to fetch
value	Integer value to fill in

Return values

len	Length of setting, or negative error

Definition at line 1023 of file settings.c.

                                      {

        return fetch_numeric_setting ( settings, setting,
                                       ( ( unsigned long * ) value ), 1 );
}

References fetch_numeric_setting(), and value.

Referenced by apply_peerdist_settings().

fetch_uint_setting()

int fetch_uint_setting	(	struct settings *	settings,
		const struct setting *	setting,
		unsigned long *	value
	)

Fetch value of unsigned integer setting.

Parameters

settings	Settings block, or NULL to search all blocks
setting	Setting to fetch
value	Integer value to fill in

Return values

len	Length of setting, or negative error

Definition at line 1039 of file settings.c.

                                                {

        return fetch_numeric_setting ( settings, setting, value, 0 );
}

References fetch_numeric_setting(), and value.

Referenced by san_default_drive(), and sandev_apply().

fetch_intz_setting()

long fetch_intz_setting	(	struct settings *	settings,
		const struct setting *	setting
	)

Fetch value of signed integer setting, or zero.

Parameters

settings	Settings block, or NULL to search all blocks
setting	Setting to fetch

Return values

value

Setting value, or zero

Definition at line 1053 of file settings.c.

                                                          {
        unsigned long value;

        fetch_numeric_setting ( settings, setting, &value, 1 );
        return value;
}

References fetch_numeric_setting(), and value.

Referenced by net80211_step_associate(), reprioritise_settings(), and uriboot().

fetch_uintz_setting()

unsigned long fetch_uintz_setting	(	struct settings *	settings,
		const struct setting *	setting
	)

Fetch value of unsigned integer setting, or zero.

Parameters

settings	Settings block, or NULL to search all blocks
setting	Setting to fetch

Return values

value

Setting value, or zero

Definition at line 1068 of file settings.c.

                                                                    {
        unsigned long value;

        fetch_numeric_setting ( settings, setting, &value, 0 );
        return value;
}

References fetch_numeric_setting(), and value.

Referenced by apply_netdev_settings(), have_pxe_menu(), oncrpc_init_cred_sys(), and start_pxebs().

fetch_uuid_setting()

int fetch_uuid_setting	(	struct settings *	settings,
		const struct setting *	setting,
		union uuid *	uuid
	)

Fetch value of UUID setting.

Parameters

settings	Settings block, or NULL to search all blocks
setting	Setting to fetch
uuid	UUID to fill in

Return values

len	Length of setting, or negative error

Definition at line 1084 of file settings.c.

                                            {
        int len;

        len = fetch_raw_setting ( settings, setting, uuid, sizeof ( *uuid ) );
        if ( len < 0 )
                return len;
        if ( len != sizeof ( *uuid ) )
                return -ERANGE;
        return len;
}

References ERANGE, fetch_raw_setting(), and len.

Referenced by dhcp_create_request(), iscsi_fetch_settings(), rbg_startup(), and start_dhcpv6().

clear_settings()

void clear_settings

(

struct settings *

settings

)

Clear settings block.

Parameters

settings

Settings block

Definition at line 1102 of file settings.c.

                                                  {

        /* Find target settings block */
        settings = settings_target ( settings );

        /* Clear settings, if applicable */
        if ( settings->op->clear )
                settings->op->clear ( settings );
}

References settings_operations::clear, settings::op, and settings_target().

Referenced by free_netdev(), register_netdev(), settings_test_exec(), and unregister_netdev().

setting_cmp()

int setting_cmp	(	const struct setting *	a,
		const struct setting *	b
	)

Compare two settings.

Parameters

a	Setting to compare
b	Setting to compare

Return values

0	Settings are the same
non-zero	Settings are not the same

Definition at line 1120 of file settings.c.

                                                                     {

        /* If the settings have tags, compare them */
        if ( a->tag && ( a->tag == b->tag ) && ( a->scope == b->scope ) )
                return 0;

        /* Otherwise, if the settings have names, compare them */
        if ( a->name && b->name && a->name[0] )
                return strcmp ( a->name, b->name );

        /* Otherwise, return a non-match */
        return ( ! 0 );
}

References a, b, and strcmp().

Referenced by applicable_setting(), builtin_fetch(), dhcpv6_applies(), dhcpv6_fetch(), efi_snp_hii_questions(), find_generic_setting(), ipv6_fetch(), ndp_prefix_fetch(), netdev_fetch(), netdev_store(), parse_setting_name(), phantom_clp_setting(), select_setting_row(), and store_setting().

find_child_settings()

struct settings* find_child_settings	(	struct settings *	parent,
		const char *	name
	)

Find child settings block.

Parameters

parent	Parent settings block
name	Name within this parent

Return values

settings

Settings block, or NULL

Definition at line 279 of file settings.c.

                                                           {
        struct settings *settings;

        /* Find target parent settings block */
        parent = settings_target ( parent );

        /* Treat empty name as meaning "this block" */
        if ( ! *name )
                return parent;

        /* Look for child with matching name */
        list_for_each_entry ( settings, &parent->children, siblings ) {
                if ( strcmp ( settings->name, name ) == 0 )
                        return settings_target ( settings );
        }

        return NULL;
}

References settings::children, list_for_each_entry, settings::name, name, NULL, settings_target(), and strcmp().

Referenced by autovivify_child_settings(), efi_snp_hii_settings(), expand_settings(), find_settings(), parse_existing_setting(), and register_settings().

autovivify_child_settings()

struct settings* autovivify_child_settings	(	struct settings *	parent,
		const char *	name
	)

Find or create child settings block.

Parameters

parent	Parent settings block
name	Name within this parent

Return values

settings

Settings block, or NULL

Definition at line 306 of file settings.c.

                                                                 {
        struct {
                struct autovivified_settings autovivified;
                char name[ strlen ( name ) + 1 /* NUL */ ];
        } *new_child;
        struct settings *settings;

        /* Find target parent settings block */
        parent = settings_target ( parent );

        /* Return existing settings, if existent */
        if ( ( settings = find_child_settings ( parent, name ) ) != NULL )
                return settings;

        /* Create new generic settings block */
        new_child = zalloc ( sizeof ( *new_child ) );
        if ( ! new_child ) {
                DBGC ( parent, "Settings %p could not create child %s\n",
                       parent, name );
                return NULL;
        }
        memcpy ( new_child->name, name, sizeof ( new_child->name ) );
        ref_init ( &new_child->autovivified.refcnt,
                   autovivified_settings_free );
        generic_settings_init ( &new_child->autovivified.generic,
                                &new_child->autovivified.refcnt );
        settings = &new_child->autovivified.generic.settings;
        register_settings ( settings, parent, new_child->name );
        ref_put ( settings->refcnt );
        return settings;
}

References autovivified_settings_free(), DBGC, find_child_settings(), generic_settings_init(), memcpy(), settings::name, name, NULL, ref_init, ref_put, settings::refcnt, register_settings(), settings_target(), strlen(), and zalloc().

Referenced by nslookup_resolv_done(), and parse_autovivified_setting().

settings_name()

const char* settings_name

(

struct settings *

settings

)

Return settings block name.

Parameters

settings

Settings block

Return values

name	Settings block name

Definition at line 345 of file settings.c.

                                                         {
        static char buf[16];
        char tmp[ 1 /* '.' */ + sizeof ( buf ) ];

        /* Find target settings block */
        settings = settings_target ( settings );

        /* Construct name */
        buf[0] = '\0';
        tmp[0] = '\0';
        for ( ; settings->parent ; settings = settings->parent ) {
                memcpy ( ( tmp + 1 ), buf, ( sizeof ( tmp ) - 1 ) );
                snprintf ( buf, sizeof ( buf ), "%s%s", settings->name, tmp );
                tmp[0] = '.';
        }
        return buf;
}

References memcpy(), settings::name, settings::parent, settings_target(), snprintf(), and tmp.

Referenced by draw_title_row(), parse_setting_name(), register_settings(), setting_name(), and unregister_settings().

find_settings()

struct settings* find_settings

(

const char *

name

)

Find settings block.

Parameters

name

Name

Return values

settings

Settings block, or NULL

Definition at line 406 of file settings.c.

                                                     {

        return parse_settings_name ( name, find_child_settings );
}

References find_child_settings(), name, and parse_settings_name().

Referenced by create_fakepxebsack(), dhcp_request_rx(), parse_settings(), and pxe_menu_boot().

find_setting()

struct setting* find_setting

(

const char *

name

)

Find predefined setting.

Parameters

name

Name

Return values

setting

Setting, or NULL

Definition at line 1466 of file settings.c.

                                                   {
        struct setting *setting;

        for_each_table_entry ( setting, SETTINGS ) {
                if ( strcmp ( name, setting->name ) == 0 )
                        return setting;
        }
        return NULL;
}

References for_each_table_entry, setting::name, name, NULL, generic_setting::setting, SETTINGS, and strcmp().

Referenced by efi_snp_hii_fetch(), efi_snp_hii_store(), and guestinfo_fetch_type().

parse_setting_name()

int parse_setting_name	(	char *	name,
		get_child_settings_t	get_child,
		struct settings **	settings,
		struct setting *	setting
	)

Parse setting name.

Parameters

name	Name of setting
get_child	Function to find or create child settings block
settings	Settings block to fill in
setting	Setting to fill in

Return values

rc	Return status code

Interprets a name of the form "[settings_name/]tag_name[:type_name]" and fills in the appropriate fields.

Note that on success, this function will have modified the original setting name.

Definition at line 1528 of file settings.c.

                                                                               {
        char *settings_name;
        char *setting_name;
        char *type_name;
        struct setting *predefined;
        int rc;

        /* Set defaults */
        *settings = &settings_root;
        memset ( setting, 0, sizeof ( *setting ) );
        setting->name = "";

        /* Split name into "[settings_name/]setting_name[:type_name]" */
        if ( ( setting_name = strchr ( name, '/' ) ) != NULL ) {
                *(setting_name++) = 0;
                settings_name = name;
        } else {
                setting_name = name;
                settings_name = NULL;
        }
        if ( ( type_name = strchr ( setting_name, ':' ) ) != NULL )
                *(type_name++) = 0;

        /* Identify settings block, if specified */
        if ( settings_name ) {
                *settings = parse_settings_name ( settings_name, get_child );
                if ( *settings == NULL ) {
                        DBG ( "Unrecognised settings block \"%s\" in \"%s\"\n",
                              settings_name, name );
                        rc = -ENODEV;
                        goto err;
                }
        }

        /* Identify setting */
        setting->tag = parse_setting_tag ( setting_name );
        setting->scope = (*settings)->default_scope;
        setting->name = setting_name;
        for_each_table_entry ( predefined, SETTINGS ) {
                /* Matches a predefined setting; use that setting */
                if ( setting_cmp ( predefined, setting ) == 0 ) {
                        memcpy ( setting, predefined, sizeof ( *setting ) );
                        break;
                }
        }

        /* Identify setting type, if specified */
        if ( type_name ) {
                setting->type = find_setting_type ( type_name );
                if ( setting->type == NULL ) {
                        DBG ( "Invalid setting type \"%s\" in \"%s\"\n",
                              type_name, name );
                        rc = -ENOTSUP;
                        goto err;
                }
        }

        return 0;

 err:
        /* Restore original name */
        if ( settings_name )
                *( setting_name - 1 ) = '/';
        if ( type_name )
                *( type_name - 1 ) = ':';
        return rc;
}

References DBG, ENODEV, ENOTSUP, find_setting_type(), for_each_table_entry, memcpy(), memset(), setting::name, name, NULL, parse_setting_tag(), parse_settings_name(), rc, setting::scope, setting_cmp(), setting_name(), SETTINGS, settings_name(), settings_root, strchr(), setting::tag, and setting::type.

Referenced by expand_settings(), nslookup_resolv_done(), and parse_setting().

setting_name()

int setting_name	(	struct settings *	settings,
		const struct setting *	setting,
		char *	buf,
		size_t	len
	)

Return full setting name.

Parameters

settings	Settings block, or NULL
setting	Setting
buf	Buffer
len	Length of buffer

Return values

len	Length of setting name, or negative error

Definition at line 1606 of file settings.c.

                                           {
        const char *name;

        settings = settings_target ( settings );
        name = settings_name ( settings );
        return snprintf ( buf, len, "%s%s%s:%s", name, ( name[0] ? "/" : "" ),
                          setting->name, setting->type->name );
}

References len, setting::name, setting_type::name, name, settings_name(), settings_target(), snprintf(), and setting::type.

Referenced by draw_info_row(), nslookup(), nslookup_exec(), parse_setting_name(), resolv_setting(), and show_exec().

setting_format()

int setting_format	(	const struct setting_type *	type,
		const void *	raw,
		size_t	raw_len,
		char *	buf,
		size_t	len
	)

Format setting value as a string.

Parameters

type	Setting type
raw	Raw setting value
raw_len	Length of raw setting value
buf	Buffer to contain formatted value
len	Length of buffer

Return values

len	Length of formatted value, or negative error

Definition at line 1151 of file settings.c.

                                                             {

        /* Sanity check */
        if ( ! type->format )
                return -ENOTSUP;

        return type->format ( type, raw, raw_len, buf, len );
}

References ENOTSUP, len, raw, raw_len, and type.

Referenced by fetchf_setting().

setting_parse()

int setting_parse	(	const struct setting_type *	type,
		const char *	value,
		void *	buf,
		size_t	len
	)

Parse formatted string to setting value.

Parameters

type	Setting type
value	Formatted setting value
buf	Buffer to contain raw value
len	Length of buffer

Return values

len	Length of raw value, or negative error

Definition at line 1170 of file settings.c.

                                            {

        /* Sanity check */
        if ( ! type->parse )
                return -ENOTSUP;

        return type->parse ( type, value, buf, len );
}

References ENOTSUP, len, type, and value.

Referenced by guestinfo_fetch_type(), and storef_setting().

setting_numerate()

int setting_numerate	(	const struct setting_type *	type,
		const void *	raw,
		size_t	raw_len,
		unsigned long *	value
	)

Convert setting value to number.

Parameters

type	Setting type
raw	Raw setting value
raw_len	Length of raw setting value

Return values

value	Numeric value
rc	Return status code

Definition at line 1189 of file settings.c.

                                                              {

        /* Sanity check */
        if ( ! type->numerate )
                return -ENOTSUP;

        return type->numerate ( type, raw, raw_len, value );
}

References ENOTSUP, raw, raw_len, type, and value.

Referenced by fetchn_setting().

setting_denumerate()

int setting_denumerate	(	const struct setting_type *	type,
		unsigned long	value,
		void *	buf,
		size_t	len
	)

Convert number to setting value.

Parameters

type	Setting type
value	Numeric value
buf	Buffer to contain raw value
len	Length of buffer

Return values

len	Length of raw value, or negative error

Definition at line 1208 of file settings.c.

                                                 {

        /* Sanity check */
        if ( ! type->denumerate )
                return -ENOTSUP;

        return type->denumerate ( type, value, buf, len );
}

References ENOTSUP, len, type, and value.

Referenced by storen_setting().

fetchf_setting()

int fetchf_setting	(	struct settings *	settings,
		const struct setting *	setting,
		struct settings **	origin,
		struct setting *	fetched,
		char *	buf,
		size_t	len
	)

Fetch formatted value of setting.

Parameters

settings	Settings block, or NULL to search all blocks
setting	Setting to fetch
origin	Origin of setting to fill in, or NULL
fetched	Fetched setting to fill in, or NULL
buf	Buffer to contain formatted value
len	Length of buffer

Return values

len	Length of formatted value, or negative error

Definition at line 1229 of file settings.c.

                                             {
        struct setting tmp_fetched;
        void *raw;
        int raw_len;
        int ret;

        /* Use local buffers if necessary */
        if ( ! fetched )
                fetched = &tmp_fetched;

        /* Fetch raw value */
        raw_len = fetch_setting_copy ( settings, setting, origin, fetched,
                                       &raw );
        if ( raw_len < 0 ) {
                ret = raw_len;
                goto err_fetch_copy;
        }

        /* Sanity check */
        assert ( fetched->type != NULL );

        /* Format setting */
        if ( ( ret = setting_format ( fetched->type, raw, raw_len, buf,
                                      len ) ) < 0 )
                goto err_format;

 err_format:
        free ( raw );
 err_fetch_copy:
        return ret;
}

References assert(), fetch_setting_copy(), free, len, NULL, origin, raw, raw_len, setting_format(), and setting::type.

Referenced by efi_snp_hii_fetch(), fetchf_setting_copy(), and select_setting_row().

fetchf_setting_copy()

int fetchf_setting_copy	(	struct settings *	settings,
		const struct setting *	setting,
		struct settings **	origin,
		struct setting *	fetched,
		char **	value
	)

Fetch copy of formatted value of setting.

Parameters

settings	Settings block, or NULL to search all blocks
setting	Setting to fetch
origin	Origin of setting to fill in, or NULL
fetched	Fetched setting to fill in, or NULL
value	Buffer to allocate and fill with formatted value

Return values

len	Length of formatted value, or negative error

The caller is responsible for eventually freeing the allocated buffer.

Definition at line 1276 of file settings.c.

                                         {
        struct settings *tmp_origin;
        struct setting tmp_fetched;
        int len;
        int check_len;

        /* Use local buffers if necessary */
        if ( ! origin )
                origin = &tmp_origin;
        if ( ! fetched )
                fetched = &tmp_fetched;

        /* Avoid returning uninitialised data on error */
        *value = NULL;

        /* Check existence, and fetch formatted value length */
        len = fetchf_setting ( settings, setting, origin, fetched, NULL, 0 );
        if ( len < 0 )
                return len;

        /* Allocate buffer */
        *value = zalloc ( len + 1 /* NUL */ );
        if ( ! *value )
                return -ENOMEM;

        /* Fetch formatted value */
        check_len = fetchf_setting ( *origin, fetched, NULL, NULL, *value,
                                     ( len + 1 /* NUL */ ) );
        assert ( check_len == len );
        return len;
}

References assert(), ENOMEM, fetchf_setting(), len, NULL, origin, value, and zalloc().

Referenced by expand_settings(), read_value(), and show_exec().

storef_setting()

int storef_setting	(	struct settings *	settings,
		const struct setting *	setting,
		const char *	value
	)

Store formatted value of setting.

Parameters

settings	Settings block
setting	Setting to store
value	Formatted setting data, or NULL

Return values

rc	Return status code

Definition at line 1319 of file settings.c.

                                         {
        void *raw;
        int raw_len;
        int check_len;
        int rc;

        /* NULL value or empty string implies deletion */
        if ( ( ! value ) || ( ! value[0] ) )
                return delete_setting ( settings, setting );

        /* Sanity check */
        assert ( setting->type != NULL );

        /* Get raw value length */
        raw_len = setting_parse ( setting->type, value, NULL, 0 );
        if ( raw_len < 0 ) {
                rc = raw_len;
                goto err_raw_len;
        }

        /* Allocate buffer for raw value */
        raw = malloc ( raw_len );
        if ( ! raw ) {
                rc = -ENOMEM;
                goto err_alloc_raw;
        }

        /* Parse formatted value */
        check_len = setting_parse ( setting->type, value, raw, raw_len );
        assert ( check_len == raw_len );

        /* Store raw value */
        if ( ( rc = store_setting ( settings, setting, raw, raw_len ) ) != 0 )
                goto err_store;

 err_store:
        free ( raw );
 err_alloc_raw:
 err_raw_len:
        return rc;
}

References assert(), delete_setting(), ENOMEM, free, malloc(), NULL, raw, raw_len, rc, setting_parse(), store_setting(), setting::type, and value.

Referenced by choose_exec(), efi_snp_hii_store(), save_setting(), and set_core_exec().

fetchn_setting()

int fetchn_setting	(	struct settings *	settings,
		const struct setting *	setting,
		struct settings **	origin,
		struct setting *	fetched,
		unsigned long *	value
	)

Fetch numeric value of setting.

Parameters

settings	Settings block, or NULL to search all blocks
setting	Setting to fetch
origin	Origin of setting to fill in, or NULL
fetched	Fetched setting to fill in, or NULL
value	Numeric value to fill in

Return values

rc	Return status code

Definition at line 1372 of file settings.c.

                                            {
        struct setting tmp_fetched;
        void *raw;
        int raw_len;
        int rc;

        /* Use local buffers if necessary */
        if ( ! fetched )
                fetched = &tmp_fetched;

        /* Fetch raw value */
        raw_len = fetch_setting_copy ( settings, setting, origin, fetched,
                                       &raw );
        if ( raw_len < 0 ) {
                rc = raw_len;
                goto err_fetch_copy;
        }

        /* Sanity check */
        assert ( fetched->type != NULL );

        /* Numerate setting */
        if ( ( rc = setting_numerate ( fetched->type, raw, raw_len,
                                       value ) ) < 0 )
                goto err_numerate;

 err_numerate:
        free ( raw );
 err_fetch_copy:
        return rc;
}

References assert(), fetch_setting_copy(), free, NULL, origin, raw, raw_len, rc, setting_numerate(), setting::type, and value.

Referenced by inc_exec(), and pciscan_exec().

storen_setting()

int storen_setting	(	struct settings *	settings,
		const struct setting *	setting,
		unsigned long	value
	)

Store numeric value of setting.

Parameters

settings	Settings block
setting	Setting
value	Numeric value

Return values

rc	Return status code

Definition at line 1414 of file settings.c.

                                           {
        void *raw;
        int raw_len;
        int check_len;
        int rc;

        /* Sanity check */
        assert ( setting->type != NULL );

        /* Get raw value length */
        raw_len = setting_denumerate ( setting->type, value, NULL, 0 );
        if ( raw_len < 0 ) {
                rc = raw_len;
                goto err_raw_len;
        }

        /* Allocate buffer for raw value */
        raw = malloc ( raw_len );
        if ( ! raw ) {
                rc = -ENOMEM;
                goto err_alloc_raw;
        }

        /* Denumerate value */
        check_len = setting_denumerate ( setting->type, value, raw, raw_len );
        assert ( check_len == raw_len );

        /* Store raw value */
        if ( ( rc = store_setting ( settings, setting, raw, raw_len ) ) != 0 )
                goto err_store;

 err_store:
        free ( raw );
 err_alloc_raw:
 err_raw_len:
        return rc;
}

References assert(), ENOMEM, free, malloc(), NULL, raw, raw_len, rc, setting_denumerate(), store_setting(), setting::type, and value.

Referenced by inc_exec(), and pciscan_exec().

expand_settings()

char* expand_settings

(

const char *

string

)

Expand variables within string.

Parameters

string

String

Return values

expstr

Expanded string

The expanded string is allocated with malloc() and the caller must eventually free() it.

Definition at line 2297 of file settings.c.

                                              {
        struct settings *settings;
        struct setting setting;
        char *expstr;
        char *start;
        char *end;
        char *head;
        char *name;
        char *tail;
        char *value;
        char *tmp;
        int new_len;
        int rc;

        /* Obtain temporary modifiable copy of string */
        expstr = strdup ( string );
        if ( ! expstr )
                return NULL;

        /* Expand while expansions remain */
        while ( 1 ) {

                head = expstr;

                /* Locate setting to be expanded */
                start = NULL;
                end = NULL;
                for ( tmp = expstr ; *tmp ; tmp++ ) {
                        if ( ( tmp[0] == '$' ) && ( tmp[1] == '{' ) )
                                start = tmp;
                        if ( start && ( tmp[0] == '}' ) ) {
                                end = tmp;
                                break;
                        }
                }
                if ( ! end )
                        break;
                *start = '\0';
                name = ( start + 2 );
                *end = '\0';
                tail = ( end + 1 );

                /* Expand setting */
                if ( ( rc = parse_setting_name ( name, find_child_settings,
                                                 &settings,
                                                 &setting ) ) != 0 ) {
                        /* Treat invalid setting names as empty */
                        value = NULL;
                } else {
                        /* Fetch and format setting value.  Ignore
                         * errors; treat non-existent settings as empty.
                         */
                        fetchf_setting_copy ( settings, &setting, NULL, NULL,
                                              &value );
                }

                /* Construct expanded string and discard old string */
                tmp = expstr;
                new_len = asprintf ( &expstr, "%s%s%s",
                                     head, ( value ? value : "" ), tail );
                free ( value );
                free ( tmp );
                if ( new_len < 0 )
                        return NULL;
        }

        return expstr;
}

References asprintf(), end, fetchf_setting_copy(), find_child_settings(), free, head, name, NULL, parse_setting_name(), rc, generic_setting::setting, start, strdup(), tmp, and value.

Referenced by expand_tokens(), fetch_next_server_and_filename(), fetch_root_path(), and fetch_san_filename().

__setting() [1/27]

const struct setting ip_setting __setting	(	SETTING_IP4	,
		ip
	)

__setting() [2/27]

const struct setting netmask_setting __setting	(	SETTING_IP4	,
		netmask
	)

__setting() [3/27]

const struct setting gateway_setting __setting	(	SETTING_IP4	,
		gateway
	)

__setting() [4/27]

const struct setting dns_setting __setting	(	SETTING_IP4_EXTRA	,
		dns
	)

__setting() [5/27]

const struct setting ip6_setting __setting	(	SETTING_IP6	,
		ip6
	)

__setting() [6/27]

const struct setting len6_setting __setting	(	SETTING_IP6	,
		len6
	)

__setting() [7/27]

const struct setting gateway6_setting __setting	(	SETTING_IP6	,
		gateway6
	)

__setting() [8/27]

const struct setting hostname_setting __setting	(	SETTING_HOST	,
		hostname
	)

__setting() [9/27]

const struct setting domain_setting __setting	(	SETTING_IP_EXTRA	,
		domain
	)

__setting() [10/27]

const struct setting filename_setting __setting	(	SETTING_BOOT	,
		filename
	)

__setting() [11/27]

const struct setting root_path_setting __setting	(	SETTING_SANBOOT	,
		root-	path
	)

__setting() [12/27]

const struct setting san_filename_setting __setting	(	SETTING_SANBOOT	,
		san-	filename
	)

__setting() [13/27]

const struct setting username_setting __setting	(	SETTING_AUTH	,
		username
	)

__setting() [14/27]

const struct setting password_setting __setting	(	SETTING_AUTH	,
		password
	)

__setting() [15/27]

const struct setting priority_setting __setting	(	SETTING_MISC	,
		priority
	)

__setting() [16/27]

const struct setting uuid_setting __setting	(	SETTING_HOST	,
		uuid
	)

__setting() [17/27]

const struct setting next_server_setting __setting	(	SETTING_BOOT	,
		next-	server
	)

__setting() [18/27]

const struct setting mac_setting __setting	(	SETTING_NETDEV	,
		mac
	)

__setting() [19/27]

const struct setting busid_setting __setting	(	SETTING_NETDEV	,
		busid
	)

__setting() [20/27]

const struct setting user_class_setting __setting	(	SETTING_HOST_EXTRA	,
		user-	class
	)

__setting() [21/27]

const struct setting vendor_class_setting __setting	(	SETTING_HOST_EXTRA	,
		vendor-	class
	)

__setting() [22/27]

const struct setting manufacturer_setting __setting	(	SETTING_HOST_EXTRA	,
		manufacturer
	)

__setting() [23/27]

const struct setting product_setting __setting	(	SETTING_HOST_EXTRA	,
		product
	)

__setting() [24/27]

const struct setting serial_setting __setting	(	SETTING_HOST_EXTRA	,
		serial
	)

__setting() [25/27]

const struct setting asset_setting __setting	(	SETTING_HOST_EXTRA	,
		asset
	)

__setting() [26/27]

const struct setting board_serial_setting __setting	(	SETTING_HOST_EXTRA	,
		board-	serial
	)

__setting() [27/27]

const struct setting dhcp_server_setting __setting	(	SETTING_MISC	,
		dhcp-	server
	)

settings_init()

static void settings_init ( struct settings *  settings, struct settings_operations *  op, struct refcnt *  refcnt, const struct settings_scope *  default_scope  )

inlinestatic

Initialise a settings block.

Parameters

settings	Settings block
op	Settings block operations
refcnt	Containing object reference counter, or NULL
default_scope	Default scope

Definition at line 496 of file settings.h.

                                                                               {
        INIT_LIST_HEAD ( &settings->siblings );
        INIT_LIST_HEAD ( &settings->children );
        settings->op = op;
        settings->refcnt = refcnt;
        settings->default_scope = default_scope;
}

References settings::children, settings::default_scope, INIT_LIST_HEAD, settings::op, op, refcnt, settings::refcnt, and settings::siblings.

Referenced by dhcppkt_init(), dhcpv6_register(), generic_settings_init(), guestinfo_net_probe(), ipv6_register_settings(), lldp_probe(), ndp_register_settings(), nvo_init(), and phantom_probe().

generic_settings_init()

static void generic_settings_init ( struct generic_settings *  generics, struct refcnt *  refcnt  )

inlinestatic

Initialise a settings block.

Parameters

generics	Generic settings block
refcnt	Containing object reference counter, or NULL

Definition at line 513 of file settings.h.

                                                                   {
        settings_init ( &generics->settings, &generic_settings_operations,
                        refcnt, NULL );
        INIT_LIST_HEAD ( &generics->list );
}

References generic_settings_operations, INIT_LIST_HEAD, generic_settings::list, NULL, generic_settings::settings, and settings_init().

Referenced by autovivify_child_settings(), and netdev_settings_init().

delete_setting()

static int delete_setting ( struct settings *  settings, const struct setting *  setting  )

inlinestatic

Delete setting.

Parameters

settings	Settings block
setting	Setting to delete

Return values

rc	Return status code

Definition at line 527 of file settings.h.

                                                                   {
        return store_setting ( settings, setting, NULL, 0 );
}

References NULL, and store_setting().

Referenced by main_loop(), and storef_setting().

setting_exists()

static int setting_exists ( struct settings *  settings, const struct setting *  setting  )

inlinestatic

Check existence of predefined setting.

Parameters

settings	Settings block, or NULL to search all blocks
setting	Setting to fetch

Return values

exists

Setting exists

Definition at line 539 of file settings.h.

                                                                   {
        return ( fetch_setting ( settings, setting, NULL, NULL,
                                 NULL, 0 ) >= 0 );
}

References fetch_setting(), and NULL.

Referenced by efi_snp_hii_fetch(), and have_pxe_menu().

Variable Documentation

builtin_scope

const struct settings_scope builtin_scope

Built-in setting scope.

Definition at line 2472 of file settings.c.

Referenced by builtin_applies().

ipv6_settings_scope

const struct settings_scope ipv6_settings_scope

IPv6 setting scope.

IPv6 setting scope.

Definition at line 1120 of file ipv6.c.

Referenced by ipv6_applies(), ipv6_register_settings(), and ndp_prefix_applies().

dhcpv6_scope

const struct settings_scope dhcpv6_scope

DHCPv6 setting scope.

DHCPv6 setting scope.

Definition at line 1792 of file settings.c.

Referenced by dhcpv6_applies(), and dhcpv6_register().

generic_settings_operations

struct settings_operations generic_settings_operations

Generic settings operations.

Definition at line 221 of file settings.c.

Referenced by generic_settings_init().

__setting_type

const struct setting_type setting_type_dnssl __setting_type

A string setting type.

PCI bus:dev.fn setting type.

GUID setting type.

UUID setting type.

A Base64-encoded setting.

A hex-string setting (non-delimited)

A hex-string setting (hyphen-delimited)

A hex-string setting (colon-delimited)

An unsigned 32-bit integer setting type.

An unsigned 16-bit integer setting type.

An unsigned 8-bit integer setting type.

A signed 32-bit integer setting type.

A signed 16-bit integer setting type.

A signed 8-bit integer setting type.

An IPv6 address setting type.

An IPv4 address setting type.

A URI-encoded string setting type.

A string setting type.

Definition at line 415 of file settings.h.