android_kernel_motorola_sm6225/include/linux/sunrpc/svcsock.h
NeilBrown cda1fd4abd [PATCH] knfsd: fix recently introduced problem with shutting down a busy NFS server
When the last thread of nfsd exits, it shuts down all related sockets.  It
currently uses svc_close_socket to do this, but that only is immediately
effective if the socket is not SK_BUSY.

If the socket is busy - i.e.  if a request has arrived that has not yet been
processes - svc_close_socket is not effective and the shutdown process spins.

So create a new svc_force_close_socket which removes the SK_BUSY flag is set
and then calls svc_close_socket.

Also change some open-codes loops in svc_destroy to use
list_for_each_entry_safe.

Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-03-06 09:30:26 -08:00

87 lines
2.7 KiB
C

/*
* linux/include/linux/sunrpc/svcsock.h
*
* RPC server socket I/O.
*
* Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
*/
#ifndef SUNRPC_SVCSOCK_H
#define SUNRPC_SVCSOCK_H
#include <linux/sunrpc/svc.h>
/*
* RPC server socket.
*/
struct svc_sock {
struct list_head sk_ready; /* list of ready sockets */
struct list_head sk_list; /* list of all sockets */
struct socket * sk_sock; /* berkeley socket layer */
struct sock * sk_sk; /* INET layer */
struct svc_pool * sk_pool; /* current pool iff queued */
struct svc_serv * sk_server; /* service for this socket */
atomic_t sk_inuse; /* use count */
unsigned long sk_flags;
#define SK_BUSY 0 /* enqueued/receiving */
#define SK_CONN 1 /* conn pending */
#define SK_CLOSE 2 /* dead or dying */
#define SK_DATA 3 /* data pending */
#define SK_TEMP 4 /* temp (TCP) socket */
#define SK_DEAD 6 /* socket closed */
#define SK_CHNGBUF 7 /* need to change snd/rcv buffer sizes */
#define SK_DEFERRED 8 /* request on sk_deferred */
#define SK_OLD 9 /* used for temp socket aging mark+sweep */
#define SK_DETACHED 10 /* detached from tempsocks list */
atomic_t sk_reserved; /* space on outq that is reserved */
spinlock_t sk_defer_lock; /* protects sk_deferred */
struct list_head sk_deferred; /* deferred requests that need to
* be revisted */
struct mutex sk_mutex; /* to serialize sending data */
int (*sk_recvfrom)(struct svc_rqst *rqstp);
int (*sk_sendto)(struct svc_rqst *rqstp);
/* We keep the old state_change and data_ready CB's here */
void (*sk_ostate)(struct sock *);
void (*sk_odata)(struct sock *, int bytes);
void (*sk_owspace)(struct sock *);
/* private TCP part */
int sk_reclen; /* length of record */
int sk_tcplen; /* current read length */
time_t sk_lastrecv; /* time of last received request */
/* cache of various info for TCP sockets */
void *sk_info_authunix;
struct sockaddr_storage sk_remote; /* remote peer's address */
int sk_remotelen; /* length of address */
};
/*
* Function prototypes.
*/
int svc_makesock(struct svc_serv *, int, unsigned short, int flags);
void svc_force_close_socket(struct svc_sock *);
int svc_recv(struct svc_rqst *, long);
int svc_send(struct svc_rqst *);
void svc_drop(struct svc_rqst *);
void svc_sock_update_bufs(struct svc_serv *serv);
int svc_sock_names(char *buf, struct svc_serv *serv, char *toclose);
int svc_addsock(struct svc_serv *serv,
int fd,
char *name_return,
int *proto);
/*
* svc_makesock socket characteristics
*/
#define SVC_SOCK_DEFAULTS (0U)
#define SVC_SOCK_ANONYMOUS (1U << 0) /* don't register with pmap */
#define SVC_SOCK_TEMPORARY (1U << 1) /* flag socket as temporary */
#endif /* SUNRPC_SVCSOCK_H */