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#ifndef _LINUX_REBOOT_H
#define _LINUX_REBOOT_H

/*
 * Magic values required to use _reboot() system call.
 */

#define	LINUX_REBOOT_MAGIC1	0xfee1dead
#define	LINUX_REBOOT_MAGIC2	672274793
#define	LINUX_REBOOT_MAGIC2A	85072278
#define	LINUX_REBOOT_MAGIC2B	369367448
#define	LINUX_REBOOT_MAGIC2C	537993216


/*
 * Commands accepted by the _reboot() system call.
 *
 * RESTART     Restart system using default command and mode.
 * HALT        Stop OS and give system control to ROM monitor, if any.
 * CAD_ON      Ctrl-Alt-Del sequence causes RESTART command.
 * CAD_OFF     Ctrl-Alt-Del sequence sends SIGINT to init task.
 * POWER_OFF   Stop OS and remove all power from system, if possible.
 * RESTART2    Restart system using given command string.
 * SW_SUSPEND  Suspend system using software suspend if compiled in.
 * KEXEC       Restart system using a previously loaded Linux kernel
 */

#define	LINUX_REBOOT_CMD_RESTART	0x01234567
#define	LINUX_REBOOT_CMD_HALT		0xCDEF0123
#define	LINUX_REBOOT_CMD_CAD_ON		0x89ABCDEF
#define	LINUX_REBOOT_CMD_CAD_OFF	0x00000000
#define	LINUX_REBOOT_CMD_POWER_OFF	0x4321FEDC
#define	LINUX_REBOOT_CMD_RESTART2	0xA1B2C3D4
#define	LINUX_REBOOT_CMD_SW_SUSPEND	0xD000FCE2
#define	LINUX_REBOOT_CMD_KEXEC		0x45584543


#ifdef __KERNEL__

#include <linux/notifier.h>

extern int register_reboot_notifier(struct notifier_block *);
extern int unregister_reboot_notifier(struct notifier_block *);


/*
 * Architecture-specific implementations of sys_reboot commands.
 */

extern void machine_restart(char *cmd);
extern void machine_halt(void);
extern void machine_power_off(void);

extern void machine_shutdown(void);
struct pt_regs;
extern void machine_crash_shutdown(struct pt_regs *);

/* 
 * Architecture independent implemenations of sys_reboot commands.
 */

extern void kernel_shutdown_prepare(enum system_states state);

extern void kernel_restart(char *cmd);
extern void kernel_halt(void);
extern void kernel_power_off(void);

void ctrl_alt_del(void);

/*
 * Emergency restart, callable from an interrupt handler.
 */

extern void emergency_restart(void);
#include <asm/emergency-restart.h>

#endif

#endif /* _LINUX_REBOOT_H */
generated by cgit v1.2.2 (git 2.25.0) at 2025-12-01 21:18:22 -0500
len = id - spec; id++; /* Anything after here requires a partial match on the ID string */ kid = asymmetric_key_id(key); if (!kid) return 0; idlen = strlen(id); kidlen = strlen(kid); if (idlen > kidlen) return 0; kid += kidlen - idlen; if (strcasecmp(id, kid) != 0) return 0; if (speclen == 2 && memcmp(spec, "id", 2) == 0) return 1; if (speclen == subtype->name_len && memcmp(spec, subtype->name, speclen) == 0) return 1; return 0; } /* * Describe the asymmetric key */ static void asymmetric_key_describe(const struct key *key, struct seq_file *m) { const struct asymmetric_key_subtype *subtype = asymmetric_key_subtype(key); const char *kid = asymmetric_key_id(key); size_t n; seq_puts(m, key->description); if (subtype) { seq_puts(m, ": "); subtype->describe(key, m); if (kid) { seq_putc(m, ' '); n = strlen(kid); if (n <= 8) seq_puts(m, kid); else seq_puts(m, kid + n - 8); } seq_puts(m, " ["); /* put something here to indicate the key's capabilities */ seq_putc(m, ']'); } } /* * Preparse a asymmetric payload to get format the contents appropriately for the * internal payload to cut down on the number of scans of the data performed. * * We also generate a proposed description from the contents of the key that * can be used to name the key if the user doesn't want to provide one. */ static int asymmetric_key_preparse(struct key_preparsed_payload *prep) { struct asymmetric_key_parser *parser; int ret; pr_devel("==>%s()\n", __func__); if (prep->datalen == 0) return -EINVAL; down_read(&asymmetric_key_parsers_sem); ret = -EBADMSG; list_for_each_entry(parser, &asymmetric_key_parsers, link) { pr_debug("Trying parser '%s'\n", parser->name); ret = parser->parse(prep); if (ret != -EBADMSG) { pr_debug("Parser recognised the format (ret %d)\n", ret); break; } } up_read(&asymmetric_key_parsers_sem); pr_devel("<==%s() = %d\n", __func__, ret); return ret; } /* * Clean up the preparse data */ static void asymmetric_key_free_preparse(struct key_preparsed_payload *prep) { struct asymmetric_key_subtype *subtype = prep->type_data[0]; pr_devel("==>%s()\n", __func__); if (subtype) { subtype->destroy(prep->payload); module_put(subtype->owner); } kfree(prep->type_data[1]); kfree(prep->description); } /* * Instantiate a asymmetric_key defined key. The key was preparsed, so we just * have to transfer the data here. */ static int asymmetric_key_instantiate(struct key *key, struct key_preparsed_payload *prep) { int ret; pr_devel("==>%s()\n", __func__); ret = key_payload_reserve(key, prep->quotalen); if (ret == 0) { key->type_data.p[0] = prep->type_data[0]; key->type_data.p[1] = prep->type_data[1]; key->payload.data = prep->payload; prep->type_data[0] = NULL; prep->type_data[1] = NULL; prep->payload = NULL; } pr_devel("<==%s() = %d\n", __func__, ret); return ret; } /* * dispose of the data dangling from the corpse of a asymmetric key */ static void asymmetric_key_destroy(struct key *key) { struct asymmetric_key_subtype *subtype = asymmetric_key_subtype(key); if (subtype) { subtype->destroy(key->payload.data); module_put(subtype->owner); key->type_data.p[0] = NULL; } kfree(key->type_data.p[1]); key->type_data.p[1] = NULL; } struct key_type key_type_asymmetric = { .name = "asymmetric", .preparse = asymmetric_key_preparse, .free_preparse = asymmetric_key_free_preparse, .instantiate = asymmetric_key_instantiate, .match = asymmetric_key_match, .destroy = asymmetric_key_destroy, .describe = asymmetric_key_describe, .def_lookup_type = KEYRING_SEARCH_LOOKUP_ITERATE, }; EXPORT_SYMBOL_GPL(key_type_asymmetric); /** * register_asymmetric_key_parser - Register a asymmetric key blob parser * @parser: The parser to register */ int register_asymmetric_key_parser(struct asymmetric_key_parser *parser) { struct asymmetric_key_parser *cursor; int ret; down_write(&asymmetric_key_parsers_sem); list_for_each_entry(cursor, &asymmetric_key_parsers, link) { if (strcmp(cursor->name, parser->name) == 0) { pr_err("Asymmetric key parser '%s' already registered\n", parser->name); ret = -EEXIST; goto out; } } list_add_tail(&parser->link, &asymmetric_key_parsers); pr_notice("Asymmetric key parser '%s' registered\n", parser->name); ret = 0; out: up_write(&asymmetric_key_parsers_sem); return ret; } EXPORT_SYMBOL_GPL(register_asymmetric_key_parser); /** * unregister_asymmetric_key_parser - Unregister a asymmetric key blob parser * @parser: The parser to unregister */ void unregister_asymmetric_key_parser(struct asymmetric_key_parser *parser) { down_write(&asymmetric_key_parsers_sem); list_del(&parser->link); up_write(&asymmetric_key_parsers_sem); pr_notice("Asymmetric key parser '%s' unregistered\n", parser->name); } EXPORT_SYMBOL_GPL(unregister_asymmetric_key_parser); /* * Module stuff */ static int __init asymmetric_key_init(void) { return register_key_type(&key_type_asymmetric); } static void __exit asymmetric_key_cleanup(void) { unregister_key_type(&key_type_asymmetric); } module_init(asymmetric_key_init); module_exit(asymmetric_key_cleanup);
generated by cgit v1.2.2 (git 2.25.0) at 2025-12-01 21:18:22 -0500