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- #ifndef _IPXE_NVO_H
- #define _IPXE_NVO_H
-
- /** @file
- *
- * Non-volatile stored options
- *
- */
-
- FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
-
- #include <stdint.h>
- #include <ipxe/dhcpopts.h>
- #include <ipxe/settings.h>
-
- struct nvs_device;
- struct refcnt;
-
- /**
- * A block of non-volatile stored options
- */
- struct nvo_block {
- /** Settings block */
- struct settings settings;
- /** Underlying non-volatile storage device */
- struct nvs_device *nvs;
- /** Address within NVS device */
- unsigned int address;
- /** Length of options data */
- size_t len;
- /** Option-containing data */
- void *data;
- /**
- * Resize non-volatile stored option block
- *
- * @v nvo Non-volatile options block
- * @v len New size
- * @ret rc Return status code
- */
- int ( * resize ) ( struct nvo_block *nvo, size_t len );
- /** DHCP options block */
- struct dhcp_options dhcpopts;
- };
-
- /** Name of non-volatile options settings block */
- #define NVO_SETTINGS_NAME "nvo"
-
- extern int nvo_applies ( struct settings *settings,
- const struct setting *setting );
- extern void nvo_init ( struct nvo_block *nvo, struct nvs_device *nvs,
- size_t address, size_t len,
- int ( * resize ) ( struct nvo_block *nvo, size_t len ),
- struct refcnt *refcnt );
- extern int register_nvo ( struct nvo_block *nvo, struct settings *parent );
- extern void unregister_nvo ( struct nvo_block *nvo );
-
- #endif /* _IPXE_NVO_H */
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