mon.c File Reference

#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/ktime.h>
#include <linux/slab.h>
#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/xprtsock.h>
#include <linux/sunrpc/svc.h>
#include <linux/lockd/lockd.h>
#include <asm/unaligned.h>
#include "netns.h"

Go to the source code of this file.

Data Structures
struct	nsm_args
struct	nsm_res

Macros
#define	NLMDBG_FACILITY   NLMDBG_MONITOR
#define	NSM_PROGRAM   100024
#define	NSM_VERSION   1
#define	SM_my_name_sz   (1+XDR_QUADLEN(SM_MAXSTRLEN))
#define	SM_my_id_sz   (SM_my_name_sz+3)
#define	SM_mon_name_sz   (1+XDR_QUADLEN(SM_MAXSTRLEN))
#define	SM_mon_id_sz   (SM_mon_name_sz+SM_my_id_sz)
#define	SM_priv_sz   (XDR_QUADLEN(SM_PRIV_SIZE))
#define	SM_mon_sz   (SM_mon_id_sz+SM_priv_sz)
#define	SM_monres_sz   2
#define	SM_unmonres_sz   1

Enumerations
enum	{   NSMPROC_NULL, NSMPROC_STAT, NSMPROC_MON, NSMPROC_UNMON,   NSMPROC_UNMON_ALL, NSMPROC_SIMU_CRASH, NSMPROC_NOTIFY }

Functions
int	nsm_monitor (const struct nlm_host *host)
void	nsm_unmonitor (const struct nlm_host *host)
struct nsm_handle *	nsm_get_handle (const struct sockaddr *sap, const size_t salen, const char *hostname, const size_t hostname_len)
struct nsm_handle *	nsm_reboot_lookup (const struct nlm_reboot *info)
void	nsm_release (struct nsm_handle *nsm)

Variables
u32 __read_mostly	nsm_local_state
bool __read_mostly	nsm_use_hostnames

Macro Definition Documentation

#define NLMDBG_FACILITY   NLMDBG_MONITOR

Definition at line 23 of file mon.c.

#define NSM_PROGRAM   100024

Definition at line 24 of file mon.c.

#define NSM_VERSION   1

Definition at line 25 of file mon.c.

#define SM_mon_id_sz   (SM_mon_name_sz+SM_my_id_sz)

Definition at line 570 of file mon.c.

#define SM_mon_name_sz   (1+XDR_QUADLEN(SM_MAXSTRLEN))

Definition at line 569 of file mon.c.

#define SM_mon_sz   (SM_mon_id_sz+SM_priv_sz)

Definition at line 572 of file mon.c.

#define SM_monres_sz   2

Definition at line 573 of file mon.c.

#define SM_my_id_sz   (SM_my_name_sz+3)

Definition at line 568 of file mon.c.

#define SM_my_name_sz   (1+XDR_QUADLEN(SM_MAXSTRLEN))

Definition at line 567 of file mon.c.

#define SM_priv_sz   (XDR_QUADLEN(SM_PRIV_SIZE))

Definition at line 571 of file mon.c.

#define SM_unmonres_sz   1

Definition at line 574 of file mon.c.

Enumeration Type Documentation

anonymous enum

Enumerator:

NSMPROC_NULL
NSMPROC_STAT
NSMPROC_MON
NSMPROC_UNMON
NSMPROC_UNMON_ALL
NSMPROC_SIMU_CRASH
NSMPROC_NOTIFY

Definition at line 27 of file mon.c.

Function Documentation

struct nsm_handle* nsm_get_handle ( const struct sockaddr *  sap, const size_t  salen, const char *  hostname, const size_t  hostname_len  )

read

nsm_get_handle - Find or create a cached nsm_handle : pointer to socket address of handle to find : length of socket address : pointer to C string containing hostname to find : length of C string

Behavior is modulated by the global nsm_use_hostnames variable.

Returns a cached nsm_handle after bumping its ref count, or returns a fresh nsm_handle if a handle that matches and/or cannot be found in the handle cache. Returns NULL if an error occurs.

Definition at line 360 of file mon.c.

int nsm_monitor

(

const struct nlm_host *

host

)

nsm_monitor - Notify a peer in case we reboot : pointer to nlm_host of peer to notify

If this peer is not already monitored, this function sends an upcall to the local rpc.statd to record the name/address of the peer to notify in case we reboot.

Returns zero if the peer is monitored by the local rpc.statd; otherwise a negative errno value is returned.

Definition at line 182 of file mon.c.

struct nsm_handle* nsm_reboot_lookup ( const struct nlm_reboot *  info )

read

nsm_reboot_lookup - match NLMPROC_SM_NOTIFY arguments to an nsm_handle : pointer to NLMPROC_SM_NOTIFY arguments

Returns a matching nsm_handle if found in the nsm cache. The returned nsm_handle's reference count is bumped. Otherwise returns NULL if some error occurred.

Definition at line 418 of file mon.c.

void nsm_release

(

struct nsm_handle *

nsm

)

nsm_release - Release an NSM handle : pointer to handle to be released

Definition at line 446 of file mon.c.

void nsm_unmonitor

(

const struct nlm_host *

host

)

nsm_unmonitor - Unregister peer notification : pointer to nlm_host of peer to stop monitoring

If this peer is monitored, this function sends an upcall to tell the local rpc.statd not to send this peer a notification when we reboot.

Definition at line 232 of file mon.c.

Variable Documentation

u32 __read_mostly nsm_local_state

Definition at line 59 of file mon.c.

bool __read_mostly nsm_use_hostnames

Definition at line 60 of file mon.c.