drbd-utils/user/v84/drbdadm.h

#ifndef DRBDADM_H
#define DRBDADM_H

#include <stdbool.h>
#include <sys/utsname.h>
#include <sys/types.h>
#include <net/if.h>
#include <stdint.h>
#include <stdarg.h>
#include <fcntl.h>

#ifndef O_CLOEXEC
#warning "O_CLOEXEC undefined, redefining to 0"
#define O_CLOEXEC 0
#endif

#include "config.h"
#include "shared_main.h"

#define API_VERSION 1
struct d_name
{
  char *name;
  struct d_name *next;
};

struct d_proxy_info
{
  struct d_name *on_hosts;
  char* inside_addr;
  char* inside_port;
  char* inside_af;
  char* outside_addr;
  char* outside_port;
  char* outside_af;
  struct d_option *options; /* named proxy_options in other places */
  struct d_option *plugins; /* named proxy_plugins in other places */
};

struct d_volume
{
  unsigned vnr;
  char* device;
  unsigned device_minor;
  char* disk;
  char* meta_disk;
  char* meta_index;
  int meta_major;
  int meta_minor;
  struct d_volume *next;
  struct d_option* disk_options; /* Additional per volume options */

  /* Do not dump an explicit volume section */
  unsigned int implicit :1 ;

  /* flags for "drbdadm adjust" */
  unsigned int adj_del_minor :1;
  unsigned int adj_add_minor :1;
  unsigned int adj_detach :1;
  unsigned int adj_attach :1;
  unsigned int adj_resize :1;
  unsigned int adj_disk_opts :1;
};

struct d_host_info
{
  struct d_name *on_hosts;
  struct d_volume *volumes;
  char* address;
  char* port;
  char* address_family;
  char* alt_address;
  char* alt_port;
  char* alt_address_family;
  struct d_proxy_info *proxy;
  struct d_host_info* next;
  struct d_resource* lower;  /* for device stacking */
  char *lower_name;          /* for device stacking, before bind_stacked_res() */
  int config_line;
  unsigned int by_address:1; /* Match to machines by address, not by names (=on_hosts) */
  struct d_option* res_options; /* Additional per host options */
};

struct d_option
{
  char* name;
  char* value;
  struct d_option* next;
  unsigned int mentioned  :1 ; // for the adjust command.
  unsigned int is_escaped :1 ;
  unsigned int adj_skip :1;
};

struct d_resource
{
  char* name;

  struct d_volume *volumes;   /* gets propagated to host_info sections later. */

  struct d_host_info* me;
  struct d_host_info* peer;
  struct d_host_info* all_hosts;
  struct d_option* net_options;
  struct d_option* disk_options;
  struct d_option* res_options;
  struct d_option* startup_options;
  struct d_option* handlers;
  struct d_option* proxy_options;
  struct d_option* proxy_plugins;
  struct d_resource* next;
  struct d_name *become_primary_on;
  char *config_file; /* The config file this resource is define in.*/
  int start_line;
  unsigned int stacked_timeouts:1;
  unsigned int ignore:1;
  unsigned int stacked:1;        /* Stacked on this node */
  unsigned int stacked_on_one:1; /* Stacked either on me or on peer */

  /* if a prerequisite command failed, don't try any further commands.
   * see run_deferred_cmds() */
  unsigned int skip_further_deferred_command:1;
};

struct adm_cmd;

struct cfg_ctx {
	/* res == NULL: does not care for resources, or iterates over all
	 * resources in the global "struct d_resource *config" */
	struct d_resource *res;
	/* vol == NULL: operate on the resource itself, or iterates over all
	 * volumes in res */
	struct d_volume *vol;

	const char *arg;
};


extern char *canonify_path(char *path);

extern int adm_adjust(struct cfg_ctx *);
extern int adm_new_minor(struct cfg_ctx *ctx);
extern int adm_new_resource(struct cfg_ctx *);
extern int adm_res_options(struct cfg_ctx *);
extern int adm_set_default_res_options(struct cfg_ctx *);
extern int adm_attach(struct cfg_ctx *);
extern int adm_disk_options(struct cfg_ctx *);
extern int adm_set_default_disk_options(struct cfg_ctx *);
extern int adm_resize(struct cfg_ctx *);
extern int adm_connect(struct cfg_ctx *);
extern int adm_net_options(struct cfg_ctx *);
extern int adm_set_default_net_options(struct cfg_ctx *);
extern int adm_disconnect(struct cfg_ctx *);
extern int adm_generic_s(struct cfg_ctx *);

extern int adm_create_md(struct cfg_ctx *);
extern int _admm_generic(struct cfg_ctx *, int flags);

extern struct d_option* find_opt(struct d_option*,char*);
extern void validate_resource(struct d_resource *, enum pp_flags);
/* stages of configuration, as performed on "drbdadm up"
 * or "drbdadm adjust":
 */
enum drbd_cfg_stage {
	/* prerequisite stage: create objects, start daemons, ... */
	CFG_PREREQ,

	/* run time changeable settings of resources */
	CFG_RESOURCE,

	/* detach/attach local disks, */
	CFG_DISK_PREREQ,
	CFG_DISK,

	/* The stage to discard network configuration, during adjust.
	 * This is after the DISK stage, because we don't want to cut access to
	 * good data while in primary role.  And before the SETTINGS stage, as
	 * some proxy or syncer settings may cause side effects and additional
	 * handshakes while we have an established connection.
	 */
	CFG_NET_PREREQ,

	/* discard/set connection parameters */
	CFG_NET,

	__CFG_LAST
};

extern void schedule_deferred_cmd( int (*function)(struct cfg_ctx *),
				   struct cfg_ctx *ctx,
				   const char *arg,
				   enum drbd_cfg_stage stage);

extern int version_code_kernel(void);
extern int version_code_userland(void);
extern void warn_on_version_mismatch(void);
extern void maybe_exec_drbdadm_83(char **argv);
extern void uc_node(enum usage_count_type type);
extern void convert_discard_opt(struct d_resource* res);
extern void convert_after_option(struct d_resource* res);
extern int have_ip(const char *af, const char *ip);

enum pr_flags {
  NoneHAllowed  = 4,
  PARSE_FOR_ADJUST = 8
};

extern struct d_resource* parse_resource_for_adjust(struct cfg_ctx *ctx);
extern struct d_resource* parse_resource(char*, enum pr_flags);
extern void post_parse(struct d_resource *config, enum pp_flags);
extern struct d_option *new_opt(char *name, char *value);
extern int name_in_names(char *name, struct d_name *names);
extern char *_names_to_str(char* buffer, struct d_name *names);
extern char *_names_to_str_c(char* buffer, struct d_name *names, char c);
#define NAMES_STR_SIZE 255
#define names_to_str(N) _names_to_str(alloca(NAMES_STR_SIZE+1), N)
#define names_to_str_c(N, C) _names_to_str_c(alloca(NAMES_STR_SIZE+1), N, C)
extern void free_names(struct d_name *names);
extern void set_me_in_resource(struct d_resource* res, int match_on_proxy);
extern void set_peer_in_resource(struct d_resource* res, int peer_required);
extern void set_on_hosts_in_res(struct d_resource *res);
extern void set_disk_in_res(struct d_resource *res);
extern int _proxy_connect_name_len(struct d_resource *res);
extern char *_proxy_connection_name(char *conn_name, struct d_resource *res);
#define proxy_connection_name(RES) \
	_proxy_connection_name(alloca(_proxy_connect_name_len(RES)), RES)
int parse_proxy_options_section(struct d_resource *res);
/* conn_name is optional and mostly for compatibility with dcmd */
int do_proxy_conn_up(struct cfg_ctx *ctx);
int do_proxy_conn_down(struct cfg_ctx *ctx);
int do_proxy_conn_plugins(struct cfg_ctx *ctx);

extern char *config_file;
extern char *config_save;
extern int config_valid;
extern struct d_resource* config;
extern struct d_resource* common;
extern int line, fline;
extern struct hsearch_data global_htable;

extern int no_tty;
extern int dry_run;
extern int verbose;
extern char* drbdsetup;
extern char* drbd_proxy_ctl;
extern char* drbdadm_83;
extern char ss_buffer[1024];
extern struct utsname nodeinfo;
extern char* connect_to_host;

struct setup_option {
	bool explicit;
	char *option;
};
struct setup_option *setup_options;

extern void add_setup_option(bool explicit, char *option);

/* ssprintf() places the result of the printf in the current stack
   frame and sets ptr to the resulting string. If the current stack
   frame is destroyed (=function returns), the allocated memory is
   freed automatically */

/*
  // This is the nicer version, that does not need the ss_buffer.
  // But it only works with very new glibcs.

#define ssprintf(...) \
	 ({ int _ss_size = snprintf(0, 0, ##__VA_ARGS__);        \
	 char *_ss_ret = __builtin_alloca(_ss_size+1);           \
	 snprintf(_ss_ret, _ss_size+1, ##__VA_ARGS__);           \
	 _ss_ret; })
*/

#define ssprintf(ptr,...) \
  ptr=strcpy(alloca(snprintf(ss_buffer,sizeof(ss_buffer),##__VA_ARGS__)+1),ss_buffer)

/* CAUTION: arguments may not have side effects! */
#define for_each_resource(res,tmp,config) \
	for (res = (config); res && (tmp = res->next, 1); res = tmp)

#define for_each_volume(v_,volumes_) \
	for (v_ = volumes_; v_; v_ = v_->next)

#define APPEND(LIST,ITEM) ({		      \
  typeof((LIST)) _l = (LIST);		      \
  typeof((ITEM)) _i = (ITEM);		      \
  typeof((ITEM)) _t;			      \
  _i->next = NULL;			      \
  if (_l == NULL) { _l = _i; }		      \
  else {				      \
    for (_t = _l; _t->next; _t = _t->next);   \
    _t->next = _i;			      \
  };					      \
  _l;					      \
})

#define INSERT_SORTED(LIST,ITEM,SORT) ({	\
	typeof((LIST)) _l = (LIST);	\
	typeof((ITEM)) _i = (ITEM);	\
	typeof((ITEM)) _t, _p = NULL;	\
	for (_t = _l; _t && _t->SORT <= _i->SORT; _p = _t, _t = _t->next); \
	if (_p)				\
		_p->next = _i;		\
	else				\
		_l = _i;		\
	_i->next = _t;			\
	_l;				\
})

#define SPLICE(LIST,ITEMS) ({		      \
  typeof((LIST)) _l = (LIST);		      \
  typeof((ITEMS)) _i = (ITEMS);		      \
  typeof((ITEMS)) _t;			      \
  if (_l == NULL) { _l = _i; }		      \
  else {				      \
    for (_t = _l; _t->next; _t = _t->next);   \
    _t->next = _i;			      \
  };					      \
  _l;					      \
})


#endif