405 lines
13 KiB
C
405 lines
13 KiB
C
|
/*
|
||
|
|
* linux/include/nfsd/state.h
|
||
|
|
*
|
||
|
|
* Copyright (c) 2001 The Regents of the University of Michigan.
|
||
|
|
* All rights reserved.
|
||
|
|
*
|
||
|
|
* Kendrick Smith <kmsmith@umich.edu>
|
||
|
|
* Andy Adamson <andros@umich.edu>
|
||
|
|
*
|
||
|
|
* Redistribution and use in source and binary forms, with or without
|
||
|
|
* modification, are permitted provided that the following conditions
|
||
|
|
* are met:
|
||
|
|
*
|
||
|
|
* 1. Redistributions of source code must retain the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer.
|
||
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer in the
|
||
|
|
* documentation and/or other materials provided with the distribution.
|
||
|
|
* 3. Neither the name of the University nor the names of its
|
||
|
|
* contributors may be used to endorse or promote products derived
|
||
|
|
* from this software without specific prior written permission.
|
||
|
|
*
|
||
|
|
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
|
||
|
|
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
||
|
|
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
||
|
|
* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
||
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
||
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
||
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
|
||
|
|
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
|
||
|
|
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
||
|
|
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
||
|
|
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef _NFSD4_STATE_H
|
||
|
|
#define _NFSD4_STATE_H
|
||
|
|
|
||
|
|
#include <linux/list.h>
|
||
|
|
#include <linux/kref.h>
|
||
|
|
#include <linux/sunrpc/clnt.h>
|
||
|
|
|
||
|
|
typedef struct {
|
||
|
|
u32 cl_boot;
|
||
|
|
u32 cl_id;
|
||
|
|
} clientid_t;
|
||
|
|
|
||
|
|
typedef struct {
|
||
|
|
u32 so_boot;
|
||
|
|
u32 so_stateownerid;
|
||
|
|
u32 so_fileid;
|
||
|
|
} stateid_opaque_t;
|
||
|
|
|
||
|
|
typedef struct {
|
||
|
|
u32 si_generation;
|
||
|
|
stateid_opaque_t si_opaque;
|
||
|
|
} stateid_t;
|
||
|
|
#define si_boot si_opaque.so_boot
|
||
|
|
#define si_stateownerid si_opaque.so_stateownerid
|
||
|
|
#define si_fileid si_opaque.so_fileid
|
||
|
|
|
||
|
|
struct nfsd4_cb_sequence {
|
||
|
|
/* args/res */
|
||
|
|
u32 cbs_minorversion;
|
||
|
|
struct nfs4_client *cbs_clp;
|
||
|
|
};
|
||
|
|
|
||
|
|
struct nfs4_delegation {
|
||
|
|
struct list_head dl_perfile;
|
||
|
|
struct list_head dl_perclnt;
|
||
|
|
struct list_head dl_recall_lru; /* delegation recalled */
|
||
|
|
atomic_t dl_count; /* ref count */
|
||
|
|
struct nfs4_client *dl_client;
|
||
|
|
struct nfs4_file *dl_file;
|
||
|
|
struct file_lock *dl_flock;
|
||
|
|
struct file *dl_vfs_file;
|
||
|
|
u32 dl_type;
|
||
|
|
time_t dl_time;
|
||
|
|
/* For recall: */
|
||
|
|
u32 dl_ident;
|
||
|
|
stateid_t dl_stateid;
|
||
|
|
struct knfsd_fh dl_fh;
|
||
|
|
int dl_retries;
|
||
|
|
};
|
||
|
|
|
||
|
|
/* client delegation callback info */
|
||
|
|
struct nfs4_cb_conn {
|
||
|
|
/* SETCLIENTID info */
|
||
|
|
struct sockaddr_storage cb_addr;
|
||
|
|
size_t cb_addrlen;
|
||
|
|
u32 cb_prog;
|
||
|
|
u32 cb_minorversion;
|
||
|
|
u32 cb_ident; /* minorversion 0 only */
|
||
|
|
/* RPC client info */
|
||
|
|
atomic_t cb_set; /* successful CB_NULL call */
|
||
|
|
struct rpc_clnt * cb_client;
|
||
|
|
};
|
||
|
|
|
||
|
|
/* Maximum number of slots per session. 160 is useful for long haul TCP */
|
||
|
|
#define NFSD_MAX_SLOTS_PER_SESSION 160
|
||
|
|
/* Maximum number of operations per session compound */
|
||
|
|
#define NFSD_MAX_OPS_PER_COMPOUND 16
|
||
|
|
/* Maximum session per slot cache size */
|
||
|
|
#define NFSD_SLOT_CACHE_SIZE 1024
|
||
|
|
/* Maximum number of NFSD_SLOT_CACHE_SIZE slots per session */
|
||
|
|
#define NFSD_CACHE_SIZE_SLOTS_PER_SESSION 32
|
||
|
|
#define NFSD_MAX_MEM_PER_SESSION \
|
||
|
|
(NFSD_CACHE_SIZE_SLOTS_PER_SESSION * NFSD_SLOT_CACHE_SIZE)
|
||
|
|
|
||
|
|
struct nfsd4_slot {
|
||
|
|
bool sl_inuse;
|
||
|
|
bool sl_cachethis;
|
||
|
|
u16 sl_opcnt;
|
||
|
|
u32 sl_seqid;
|
||
|
|
__be32 sl_status;
|
||
|
|
u32 sl_datalen;
|
||
|
|
char sl_data[];
|
||
|
|
};
|
||
|
|
|
||
|
|
struct nfsd4_channel_attrs {
|
||
|
|
u32 headerpadsz;
|
||
|
|
u32 maxreq_sz;
|
||
|
|
u32 maxresp_sz;
|
||
|
|
u32 maxresp_cached;
|
||
|
|
u32 maxops;
|
||
|
|
u32 maxreqs;
|
||
|
|
u32 nr_rdma_attrs;
|
||
|
|
u32 rdma_attrs;
|
||
|
|
};
|
||
|
|
|
||
|
|
struct nfsd4_create_session {
|
||
|
|
clientid_t clientid;
|
||
|
|
struct nfs4_sessionid sessionid;
|
||
|
|
u32 seqid;
|
||
|
|
u32 flags;
|
||
|
|
struct nfsd4_channel_attrs fore_channel;
|
||
|
|
struct nfsd4_channel_attrs back_channel;
|
||
|
|
u32 callback_prog;
|
||
|
|
u32 uid;
|
||
|
|
u32 gid;
|
||
|
|
};
|
||
|
|
|
||
|
|
/* The single slot clientid cache structure */
|
||
|
|
struct nfsd4_clid_slot {
|
||
|
|
u32 sl_seqid;
|
||
|
|
__be32 sl_status;
|
||
|
|
struct nfsd4_create_session sl_cr_ses;
|
||
|
|
};
|
||
|
|
|
||
|
|
struct nfsd4_session {
|
||
|
|
struct kref se_ref;
|
||
|
|
struct list_head se_hash; /* hash by sessionid */
|
||
|
|
struct list_head se_perclnt;
|
||
|
|
u32 se_flags;
|
||
|
|
struct nfs4_client *se_client; /* for expire_client */
|
||
|
|
struct nfs4_sessionid se_sessionid;
|
||
|
|
struct nfsd4_channel_attrs se_fchannel;
|
||
|
|
struct nfsd4_channel_attrs se_bchannel;
|
||
|
|
struct nfsd4_slot *se_slots[]; /* forward channel slots */
|
||
|
|
};
|
||
|
|
|
||
|
|
static inline void
|
||
|
|
nfsd4_put_session(struct nfsd4_session *ses)
|
||
|
|
{
|
||
|
|
extern void free_session(struct kref *kref);
|
||
|
|
kref_put(&ses->se_ref, free_session);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void
|
||
|
|
nfsd4_get_session(struct nfsd4_session *ses)
|
||
|
|
{
|
||
|
|
kref_get(&ses->se_ref);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* formatted contents of nfs4_sessionid */
|
||
|
|
struct nfsd4_sessionid {
|
||
|
|
clientid_t clientid;
|
||
|
|
u32 sequence;
|
||
|
|
u32 reserved;
|
||
|
|
};
|
||
|
|
|
||
|
|
#define HEXDIR_LEN 33 /* hex version of 16 byte md5 of cl_name plus '\0' */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* struct nfs4_client - one per client. Clientids live here.
|
||
|
|
* o Each nfs4_client is hashed by clientid.
|
||
|
|
*
|
||
|
|
* o Each nfs4_clients is also hashed by name
|
||
|
|
* (the opaque quantity initially sent by the client to identify itself).
|
||
|
|
*
|
||
|
|
* o cl_perclient list is used to ensure no dangling stateowner references
|
||
|
|
* when we expire the nfs4_client
|
||
|
|
*/
|
||
|
|
struct nfs4_client {
|
||
|
|
struct list_head cl_idhash; /* hash by cl_clientid.id */
|
||
|
|
struct list_head cl_strhash; /* hash by cl_name */
|
||
|
|
struct list_head cl_openowners;
|
||
|
|
struct list_head cl_delegations;
|
||
|
|
struct list_head cl_lru; /* tail queue */
|
||
|
|
struct xdr_netobj cl_name; /* id generated by client */
|
||
|
|
char cl_recdir[HEXDIR_LEN]; /* recovery dir */
|
||
|
|
nfs4_verifier cl_verifier; /* generated by client */
|
||
|
|
time_t cl_time; /* time of last lease renewal */
|
||
|
|
struct sockaddr_storage cl_addr; /* client ipaddress */
|
||
|
|
u32 cl_flavor; /* setclientid pseudoflavor */
|
||
|
|
char *cl_principal; /* setclientid principal name */
|
||
|
|
struct svc_cred cl_cred; /* setclientid principal */
|
||
|
|
clientid_t cl_clientid; /* generated by server */
|
||
|
|
nfs4_verifier cl_confirm; /* generated by server */
|
||
|
|
struct nfs4_cb_conn cl_cb_conn; /* callback info */
|
||
|
|
atomic_t cl_count; /* ref count */
|
||
|
|
u32 cl_firststate; /* recovery dir creation */
|
||
|
|
|
||
|
|
/* for nfs41 */
|
||
|
|
struct list_head cl_sessions;
|
||
|
|
struct nfsd4_clid_slot cl_cs_slot; /* create_session slot */
|
||
|
|
u32 cl_exchange_flags;
|
||
|
|
struct nfs4_sessionid cl_sessionid;
|
||
|
|
|
||
|
|
/* for nfs41 callbacks */
|
||
|
|
/* We currently support a single back channel with a single slot */
|
||
|
|
unsigned long cl_cb_slot_busy;
|
||
|
|
u32 cl_cb_seq_nr;
|
||
|
|
struct svc_xprt *cl_cb_xprt; /* 4.1 callback transport */
|
||
|
|
struct rpc_wait_queue cl_cb_waitq; /* backchannel callers may */
|
||
|
|
/* wait here for slots */
|
||
|
|
};
|
||
|
|
|
||
|
|
/* struct nfs4_client_reset
|
||
|
|
* one per old client. Populates reset_str_hashtbl. Filled from conf_id_hashtbl
|
||
|
|
* upon lease reset, or from upcall to state_daemon (to read in state
|
||
|
|
* from non-volitile storage) upon reboot.
|
||
|
|
*/
|
||
|
|
struct nfs4_client_reclaim {
|
||
|
|
struct list_head cr_strhash; /* hash by cr_name */
|
||
|
|
char cr_recdir[HEXDIR_LEN]; /* recover dir */
|
||
|
|
};
|
||
|
|
|
||
|
|
static inline void
|
||
|
|
update_stateid(stateid_t *stateid)
|
||
|
|
{
|
||
|
|
stateid->si_generation++;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* A reasonable value for REPLAY_ISIZE was estimated as follows:
|
||
|
|
* The OPEN response, typically the largest, requires
|
||
|
|
* 4(status) + 8(stateid) + 20(changeinfo) + 4(rflags) + 8(verifier) +
|
||
|
|
* 4(deleg. type) + 8(deleg. stateid) + 4(deleg. recall flag) +
|
||
|
|
* 20(deleg. space limit) + ~32(deleg. ace) = 112 bytes
|
||
|
|
*/
|
||
|
|
|
||
|
|
#define NFSD4_REPLAY_ISIZE 112
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Replay buffer, where the result of the last seqid-mutating operation
|
||
|
|
* is cached.
|
||
|
|
*/
|
||
|
|
struct nfs4_replay {
|
||
|
|
__be32 rp_status;
|
||
|
|
unsigned int rp_buflen;
|
||
|
|
char *rp_buf;
|
||
|
|
unsigned intrp_allocated;
|
||
|
|
struct knfsd_fh rp_openfh;
|
||
|
|
char rp_ibuf[NFSD4_REPLAY_ISIZE];
|
||
|
|
};
|
||
|
|
|
||
|
|
/*
|
||
|
|
* nfs4_stateowner can either be an open_owner, or a lock_owner
|
||
|
|
*
|
||
|
|
* so_idhash: stateid_hashtbl[] for open owner, lockstateid_hashtbl[]
|
||
|
|
* for lock_owner
|
||
|
|
* so_strhash: ownerstr_hashtbl[] for open_owner, lock_ownerstr_hashtbl[]
|
||
|
|
* for lock_owner
|
||
|
|
* so_perclient: nfs4_client->cl_perclient entry - used when nfs4_client
|
||
|
|
* struct is reaped.
|
||
|
|
* so_perfilestate: heads the list of nfs4_stateid (either open or lock)
|
||
|
|
* and is used to ensure no dangling nfs4_stateid references when we
|
||
|
|
* release a stateowner.
|
||
|
|
* so_perlockowner: (open) nfs4_stateid->st_perlockowner entry - used when
|
||
|
|
* close is called to reap associated byte-range locks
|
||
|
|
* so_close_lru: (open) stateowner is placed on this list instead of being
|
||
|
|
* reaped (when so_perfilestate is empty) to hold the last close replay.
|
||
|
|
* reaped by laundramat thread after lease period.
|
||
|
|
*/
|
||
|
|
struct nfs4_stateowner {
|
||
|
|
struct kref so_ref;
|
||
|
|
struct list_head so_idhash; /* hash by so_id */
|
||
|
|
struct list_head so_strhash; /* hash by op_name */
|
||
|
|
struct list_head so_perclient;
|
||
|
|
struct list_head so_stateids;
|
||
|
|
struct list_head so_perstateid; /* for lockowners only */
|
||
|
|
struct list_head so_close_lru; /* tail queue */
|
||
|
|
time_t so_time; /* time of placement on so_close_lru */
|
||
|
|
int so_is_open_owner; /* 1=openowner,0=lockowner */
|
||
|
|
u32 so_id;
|
||
|
|
struct nfs4_client * so_client;
|
||
|
|
/* after increment in ENCODE_SEQID_OP_TAIL, represents the next
|
||
|
|
* sequence id expected from the client: */
|
||
|
|
u32 so_seqid;
|
||
|
|
struct xdr_netobj so_owner; /* open owner name */
|
||
|
|
int so_confirmed; /* successful OPEN_CONFIRM? */
|
||
|
|
struct nfs4_replay so_replay;
|
||
|
|
};
|
||
|
|
|
||
|
|
/*
|
||
|
|
* nfs4_file: a file opened by some number of (open) nfs4_stateowners.
|
||
|
|
* o fi_perfile list is used to search for conflicting
|
||
|
|
* share_acces, share_deny on the file.
|
||
|
|
*/
|
||
|
|
struct nfs4_file {
|
||
|
|
atomic_t fi_ref;
|
||
|
|
struct list_head fi_hash; /* hash by "struct inode *" */
|
||
|
|
struct list_head fi_stateids;
|
||
|
|
struct list_head fi_delegations;
|
||
|
|
struct inode *fi_inode;
|
||
|
|
u32 fi_id; /* used with stateowner->so_id
|
||
|
|
* for stateid_hashtbl hash */
|
||
|
|
bool fi_had_conflict;
|
||
|
|
};
|
||
|
|
|
||
|
|
/*
|
||
|
|
* nfs4_stateid can either be an open stateid or (eventually) a lock stateid
|
||
|
|
*
|
||
|
|
* (open)nfs4_stateid: one per (open)nfs4_stateowner, nfs4_file
|
||
|
|
*
|
||
|
|
* st_hash: stateid_hashtbl[] entry or lockstateid_hashtbl entry
|
||
|
|
* st_perfile: file_hashtbl[] entry.
|
||
|
|
* st_perfile_state: nfs4_stateowner->so_perfilestate
|
||
|
|
* st_perlockowner: (open stateid) list of lock nfs4_stateowners
|
||
|
|
* st_access_bmap: used only for open stateid
|
||
|
|
* st_deny_bmap: used only for open stateid
|
||
|
|
* st_openstp: open stateid lock stateid was derived from
|
||
|
|
*
|
||
|
|
* XXX: open stateids and lock stateids have diverged sufficiently that
|
||
|
|
* we should consider defining separate structs for the two cases.
|
||
|
|
*/
|
||
|
|
|
||
|
|
struct nfs4_stateid {
|
||
|
|
struct list_head st_hash;
|
||
|
|
struct list_head st_perfile;
|
||
|
|
struct list_head st_perstateowner;
|
||
|
|
struct list_head st_lockowners;
|
||
|
|
struct nfs4_stateowner * st_stateowner;
|
||
|
|
struct nfs4_file * st_file;
|
||
|
|
stateid_t st_stateid;
|
||
|
|
struct file * st_vfs_file;
|
||
|
|
unsigned long st_access_bmap;
|
||
|
|
unsigned long st_deny_bmap;
|
||
|
|
struct nfs4_stateid * st_openstp;
|
||
|
|
};
|
||
|
|
|
||
|
|
/* flags for preprocess_seqid_op() */
|
||
|
|
#define HAS_SESSION 0x00000001
|
||
|
|
#define CONFIRM 0x00000002
|
||
|
|
#define OPEN_STATE 0x00000004
|
||
|
|
#define LOCK_STATE 0x00000008
|
||
|
|
#define RD_STATE 0x00000010
|
||
|
|
#define WR_STATE 0x00000020
|
||
|
|
#define CLOSE_STATE 0x00000040
|
||
|
|
|
||
|
|
#define seqid_mutating_err(err) \
|
||
|
|
(((err) != nfserr_stale_clientid) && \
|
||
|
|
((err) != nfserr_bad_seqid) && \
|
||
|
|
((err) != nfserr_stale_stateid) && \
|
||
|
|
((err) != nfserr_bad_stateid))
|
||
|
|
|
||
|
|
struct nfsd4_compound_state;
|
||
|
|
|
||
|
|
extern __be32 nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate,
|
||
|
|
stateid_t *stateid, int flags, struct file **filp);
|
||
|
|
extern void nfs4_lock_state(void);
|
||
|
|
extern void nfs4_unlock_state(void);
|
||
|
|
extern int nfs4_in_grace(void);
|
||
|
|
extern __be32 nfs4_check_open_reclaim(clientid_t *clid);
|
||
|
|
extern void put_nfs4_client(struct nfs4_client *clp);
|
||
|
|
extern void nfs4_free_stateowner(struct kref *kref);
|
||
|
|
extern int set_callback_cred(void);
|
||
|
|
extern void nfsd4_probe_callback(struct nfs4_client *clp);
|
||
|
|
extern void nfsd4_cb_recall(struct nfs4_delegation *dp);
|
||
|
|
extern void nfs4_put_delegation(struct nfs4_delegation *dp);
|
||
|
|
extern __be32 nfs4_make_rec_clidname(char *clidname, struct xdr_netobj *clname);
|
||
|
|
extern void nfsd4_init_recdir(char *recdir_name);
|
||
|
|
extern int nfsd4_recdir_load(void);
|
||
|
|
extern void nfsd4_shutdown_recdir(void);
|
||
|
|
extern int nfs4_client_to_reclaim(const char *name);
|
||
|
|
extern int nfs4_has_reclaimed_state(const char *name, bool use_exchange_id);
|
||
|
|
extern void nfsd4_recdir_purge_old(void);
|
||
|
|
extern int nfsd4_create_clid_dir(struct nfs4_client *clp);
|
||
|
|
extern void nfsd4_remove_clid_dir(struct nfs4_client *clp);
|
||
|
|
|
||
|
|
static inline void
|
||
|
|
nfs4_put_stateowner(struct nfs4_stateowner *so)
|
||
|
|
{
|
||
|
|
kref_put(&so->so_ref, nfs4_free_stateowner);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void
|
||
|
|
nfs4_get_stateowner(struct nfs4_stateowner *so)
|
||
|
|
{
|
||
|
|
kref_get(&so->so_ref);
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* NFSD4_STATE_H */
|