1f7977c136
Confine it to the nfs4_do_close() code. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
415 lines
14 KiB
C
415 lines
14 KiB
C
/*
|
|
* linux/fs/nfs/nfs4_fs.h
|
|
*
|
|
* Copyright (C) 2005 Trond Myklebust
|
|
*
|
|
* NFSv4-specific filesystem definitions and declarations
|
|
*/
|
|
|
|
#ifndef __LINUX_FS_NFS_NFS4_FS_H
|
|
#define __LINUX_FS_NFS_NFS4_FS_H
|
|
|
|
#if IS_ENABLED(CONFIG_NFS_V4)
|
|
|
|
struct idmap;
|
|
|
|
enum nfs4_client_state {
|
|
NFS4CLNT_MANAGER_RUNNING = 0,
|
|
NFS4CLNT_CHECK_LEASE,
|
|
NFS4CLNT_LEASE_EXPIRED,
|
|
NFS4CLNT_RECLAIM_REBOOT,
|
|
NFS4CLNT_RECLAIM_NOGRACE,
|
|
NFS4CLNT_DELEGRETURN,
|
|
NFS4CLNT_SESSION_RESET,
|
|
NFS4CLNT_RECALL_SLOT,
|
|
NFS4CLNT_LEASE_CONFIRM,
|
|
NFS4CLNT_SERVER_SCOPE_MISMATCH,
|
|
NFS4CLNT_PURGE_STATE,
|
|
NFS4CLNT_BIND_CONN_TO_SESSION,
|
|
};
|
|
|
|
enum nfs4_session_state {
|
|
NFS4_SESSION_INITING,
|
|
NFS4_SESSION_DRAINING,
|
|
};
|
|
|
|
#define NFS4_RENEW_TIMEOUT 0x01
|
|
#define NFS4_RENEW_DELEGATION_CB 0x02
|
|
|
|
struct nfs4_minor_version_ops {
|
|
u32 minor_version;
|
|
|
|
int (*call_sync)(struct rpc_clnt *clnt,
|
|
struct nfs_server *server,
|
|
struct rpc_message *msg,
|
|
struct nfs4_sequence_args *args,
|
|
struct nfs4_sequence_res *res,
|
|
int cache_reply);
|
|
bool (*match_stateid)(const nfs4_stateid *,
|
|
const nfs4_stateid *);
|
|
int (*find_root_sec)(struct nfs_server *, struct nfs_fh *,
|
|
struct nfs_fsinfo *);
|
|
const struct nfs4_state_recovery_ops *reboot_recovery_ops;
|
|
const struct nfs4_state_recovery_ops *nograce_recovery_ops;
|
|
const struct nfs4_state_maintenance_ops *state_renewal_ops;
|
|
};
|
|
|
|
#define NFS_SEQID_CONFIRMED 1
|
|
struct nfs_seqid_counter {
|
|
ktime_t create_time;
|
|
int owner_id;
|
|
int flags;
|
|
u32 counter;
|
|
spinlock_t lock; /* Protects the list */
|
|
struct list_head list; /* Defines sequence of RPC calls */
|
|
struct rpc_wait_queue wait; /* RPC call delay queue */
|
|
};
|
|
|
|
struct nfs_seqid {
|
|
struct nfs_seqid_counter *sequence;
|
|
struct list_head list;
|
|
struct rpc_task *task;
|
|
};
|
|
|
|
static inline void nfs_confirm_seqid(struct nfs_seqid_counter *seqid, int status)
|
|
{
|
|
if (seqid_mutating_err(-status))
|
|
seqid->flags |= NFS_SEQID_CONFIRMED;
|
|
}
|
|
|
|
/*
|
|
* NFS4 state_owners and lock_owners are simply labels for ordered
|
|
* sequences of RPC calls. Their sole purpose is to provide once-only
|
|
* semantics by allowing the server to identify replayed requests.
|
|
*/
|
|
struct nfs4_state_owner {
|
|
struct nfs_server *so_server;
|
|
struct list_head so_lru;
|
|
unsigned long so_expires;
|
|
struct rb_node so_server_node;
|
|
|
|
struct rpc_cred *so_cred; /* Associated cred */
|
|
|
|
spinlock_t so_lock;
|
|
atomic_t so_count;
|
|
unsigned long so_flags;
|
|
struct list_head so_states;
|
|
struct nfs_seqid_counter so_seqid;
|
|
};
|
|
|
|
enum {
|
|
NFS_OWNER_RECLAIM_REBOOT,
|
|
NFS_OWNER_RECLAIM_NOGRACE
|
|
};
|
|
|
|
#define NFS_LOCK_NEW 0
|
|
#define NFS_LOCK_RECLAIM 1
|
|
#define NFS_LOCK_EXPIRED 2
|
|
|
|
/*
|
|
* struct nfs4_state maintains the client-side state for a given
|
|
* (state_owner,inode) tuple (OPEN) or state_owner (LOCK).
|
|
*
|
|
* OPEN:
|
|
* In order to know when to OPEN_DOWNGRADE or CLOSE the state on the server,
|
|
* we need to know how many files are open for reading or writing on a
|
|
* given inode. This information too is stored here.
|
|
*
|
|
* LOCK: one nfs4_state (LOCK) to hold the lock stateid nfs4_state(OPEN)
|
|
*/
|
|
|
|
struct nfs4_lock_owner {
|
|
unsigned int lo_type;
|
|
#define NFS4_ANY_LOCK_TYPE (0U)
|
|
#define NFS4_FLOCK_LOCK_TYPE (1U << 0)
|
|
#define NFS4_POSIX_LOCK_TYPE (1U << 1)
|
|
union {
|
|
fl_owner_t posix_owner;
|
|
pid_t flock_owner;
|
|
} lo_u;
|
|
};
|
|
|
|
struct nfs4_lock_state {
|
|
struct list_head ls_locks; /* Other lock stateids */
|
|
struct nfs4_state * ls_state; /* Pointer to open state */
|
|
#define NFS_LOCK_INITIALIZED 0
|
|
unsigned long ls_flags;
|
|
struct nfs_seqid_counter ls_seqid;
|
|
nfs4_stateid ls_stateid;
|
|
atomic_t ls_count;
|
|
struct nfs4_lock_owner ls_owner;
|
|
};
|
|
|
|
/* bits for nfs4_state->flags */
|
|
enum {
|
|
LK_STATE_IN_USE,
|
|
NFS_DELEGATED_STATE, /* Current stateid is delegation */
|
|
NFS_O_RDONLY_STATE, /* OPEN stateid has read-only state */
|
|
NFS_O_WRONLY_STATE, /* OPEN stateid has write-only state */
|
|
NFS_O_RDWR_STATE, /* OPEN stateid has read/write state */
|
|
NFS_STATE_RECLAIM_REBOOT, /* OPEN stateid server rebooted */
|
|
NFS_STATE_RECLAIM_NOGRACE, /* OPEN stateid needs to recover state */
|
|
NFS_STATE_POSIX_LOCKS, /* Posix locks are supported */
|
|
};
|
|
|
|
struct nfs4_state {
|
|
struct list_head open_states; /* List of states for the same state_owner */
|
|
struct list_head inode_states; /* List of states for the same inode */
|
|
struct list_head lock_states; /* List of subservient lock stateids */
|
|
|
|
struct nfs4_state_owner *owner; /* Pointer to the open owner */
|
|
struct inode *inode; /* Pointer to the inode */
|
|
|
|
unsigned long flags; /* Do we hold any locks? */
|
|
spinlock_t state_lock; /* Protects the lock_states list */
|
|
|
|
seqlock_t seqlock; /* Protects the stateid/open_stateid */
|
|
nfs4_stateid stateid; /* Current stateid: may be delegation */
|
|
nfs4_stateid open_stateid; /* OPEN stateid */
|
|
|
|
/* The following 3 fields are protected by owner->so_lock */
|
|
unsigned int n_rdonly; /* Number of read-only references */
|
|
unsigned int n_wronly; /* Number of write-only references */
|
|
unsigned int n_rdwr; /* Number of read/write references */
|
|
fmode_t state; /* State on the server (R,W, or RW) */
|
|
atomic_t count;
|
|
};
|
|
|
|
|
|
struct nfs4_exception {
|
|
long timeout;
|
|
int retry;
|
|
struct nfs4_state *state;
|
|
struct inode *inode;
|
|
};
|
|
|
|
struct nfs4_state_recovery_ops {
|
|
int owner_flag_bit;
|
|
int state_flag_bit;
|
|
int (*recover_open)(struct nfs4_state_owner *, struct nfs4_state *);
|
|
int (*recover_lock)(struct nfs4_state *, struct file_lock *);
|
|
int (*establish_clid)(struct nfs_client *, struct rpc_cred *);
|
|
struct rpc_cred * (*get_clid_cred)(struct nfs_client *);
|
|
int (*reclaim_complete)(struct nfs_client *);
|
|
};
|
|
|
|
struct nfs4_state_maintenance_ops {
|
|
int (*sched_state_renewal)(struct nfs_client *, struct rpc_cred *, unsigned);
|
|
struct rpc_cred * (*get_state_renewal_cred_locked)(struct nfs_client *);
|
|
int (*renew_lease)(struct nfs_client *, struct rpc_cred *);
|
|
};
|
|
|
|
extern const struct dentry_operations nfs4_dentry_operations;
|
|
|
|
/* dir.c */
|
|
int nfs_atomic_open(struct inode *, struct dentry *, struct file *,
|
|
unsigned, umode_t, int *);
|
|
|
|
/* super.c */
|
|
extern struct file_system_type nfs4_fs_type;
|
|
|
|
/* nfs4namespace.c */
|
|
rpc_authflavor_t nfs_find_best_sec(struct nfs4_secinfo_flavors *);
|
|
struct rpc_clnt *nfs4_create_sec_client(struct rpc_clnt *, struct inode *, struct qstr *);
|
|
struct vfsmount *nfs4_submount(struct nfs_server *, struct dentry *,
|
|
struct nfs_fh *, struct nfs_fattr *);
|
|
|
|
/* nfs4proc.c */
|
|
extern int nfs4_proc_setclientid(struct nfs_client *, u32, unsigned short, struct rpc_cred *, struct nfs4_setclientid_res *);
|
|
extern int nfs4_proc_setclientid_confirm(struct nfs_client *, struct nfs4_setclientid_res *arg, struct rpc_cred *);
|
|
extern int nfs4_proc_get_rootfh(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
|
|
extern int nfs4_proc_bind_conn_to_session(struct nfs_client *, struct rpc_cred *cred);
|
|
extern int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred);
|
|
extern int nfs4_destroy_clientid(struct nfs_client *clp);
|
|
extern int nfs4_init_clientid(struct nfs_client *, struct rpc_cred *);
|
|
extern int nfs41_init_clientid(struct nfs_client *, struct rpc_cred *);
|
|
extern int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait);
|
|
extern int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle);
|
|
extern int nfs4_proc_fs_locations(struct rpc_clnt *, struct inode *, const struct qstr *,
|
|
struct nfs4_fs_locations *, struct page *);
|
|
extern struct rpc_clnt *nfs4_proc_lookup_mountpoint(struct inode *, struct qstr *,
|
|
struct nfs_fh *, struct nfs_fattr *);
|
|
extern int nfs4_proc_secinfo(struct inode *, const struct qstr *, struct nfs4_secinfo_flavors *);
|
|
extern int nfs4_release_lockowner(struct nfs4_lock_state *);
|
|
extern const struct xattr_handler *nfs4_xattr_handlers[];
|
|
|
|
#if defined(CONFIG_NFS_V4_1)
|
|
static inline struct nfs4_session *nfs4_get_session(const struct nfs_server *server)
|
|
{
|
|
return server->nfs_client->cl_session;
|
|
}
|
|
|
|
extern bool nfs4_set_task_privileged(struct rpc_task *task, void *dummy);
|
|
extern int nfs4_setup_sequence(const struct nfs_server *server,
|
|
struct nfs4_sequence_args *args, struct nfs4_sequence_res *res,
|
|
struct rpc_task *task);
|
|
extern int nfs41_setup_sequence(struct nfs4_session *session,
|
|
struct nfs4_sequence_args *args, struct nfs4_sequence_res *res,
|
|
struct rpc_task *task);
|
|
extern void nfs4_destroy_session(struct nfs4_session *session);
|
|
extern struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp);
|
|
extern int nfs4_proc_create_session(struct nfs_client *, struct rpc_cred *);
|
|
extern int nfs4_proc_destroy_session(struct nfs4_session *, struct rpc_cred *);
|
|
extern int nfs4_init_session(struct nfs_server *server);
|
|
extern int nfs4_proc_get_lease_time(struct nfs_client *clp,
|
|
struct nfs_fsinfo *fsinfo);
|
|
extern int nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data,
|
|
bool sync);
|
|
|
|
static inline bool
|
|
is_ds_only_client(struct nfs_client *clp)
|
|
{
|
|
return (clp->cl_exchange_flags & EXCHGID4_FLAG_MASK_PNFS) ==
|
|
EXCHGID4_FLAG_USE_PNFS_DS;
|
|
}
|
|
|
|
static inline bool
|
|
is_ds_client(struct nfs_client *clp)
|
|
{
|
|
return clp->cl_exchange_flags & EXCHGID4_FLAG_USE_PNFS_DS;
|
|
}
|
|
#else /* CONFIG_NFS_v4_1 */
|
|
static inline struct nfs4_session *nfs4_get_session(const struct nfs_server *server)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline int nfs4_setup_sequence(const struct nfs_server *server,
|
|
struct nfs4_sequence_args *args, struct nfs4_sequence_res *res,
|
|
struct rpc_task *task)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int nfs4_init_session(struct nfs_server *server)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline bool
|
|
is_ds_only_client(struct nfs_client *clp)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline bool
|
|
is_ds_client(struct nfs_client *clp)
|
|
{
|
|
return false;
|
|
}
|
|
#endif /* CONFIG_NFS_V4_1 */
|
|
|
|
extern const struct nfs4_minor_version_ops *nfs_v4_minor_ops[];
|
|
|
|
extern const u32 nfs4_fattr_bitmap[3];
|
|
extern const u32 nfs4_statfs_bitmap[2];
|
|
extern const u32 nfs4_pathconf_bitmap[2];
|
|
extern const u32 nfs4_fsinfo_bitmap[3];
|
|
extern const u32 nfs4_fs_locations_bitmap[2];
|
|
|
|
void nfs4_free_client(struct nfs_client *);
|
|
|
|
struct nfs_client *nfs4_alloc_client(const struct nfs_client_initdata *);
|
|
|
|
/* nfs4renewd.c */
|
|
extern void nfs4_schedule_state_renewal(struct nfs_client *);
|
|
extern void nfs4_renewd_prepare_shutdown(struct nfs_server *);
|
|
extern void nfs4_kill_renewd(struct nfs_client *);
|
|
extern void nfs4_renew_state(struct work_struct *);
|
|
|
|
/* nfs4state.c */
|
|
struct rpc_cred *nfs4_get_setclientid_cred(struct nfs_client *clp);
|
|
struct rpc_cred *nfs4_get_renew_cred_locked(struct nfs_client *clp);
|
|
#if defined(CONFIG_NFS_V4_1)
|
|
struct rpc_cred *nfs4_get_machine_cred_locked(struct nfs_client *clp);
|
|
struct rpc_cred *nfs4_get_exchange_id_cred(struct nfs_client *clp);
|
|
extern void nfs4_schedule_session_recovery(struct nfs4_session *, int);
|
|
#else
|
|
static inline void nfs4_schedule_session_recovery(struct nfs4_session *session, int err)
|
|
{
|
|
}
|
|
#endif /* CONFIG_NFS_V4_1 */
|
|
|
|
extern struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *, struct rpc_cred *, gfp_t);
|
|
extern void nfs4_put_state_owner(struct nfs4_state_owner *);
|
|
extern void nfs4_purge_state_owners(struct nfs_server *);
|
|
extern struct nfs4_state * nfs4_get_open_state(struct inode *, struct nfs4_state_owner *);
|
|
extern void nfs4_put_open_state(struct nfs4_state *);
|
|
extern void nfs4_close_state(struct nfs4_state *, fmode_t);
|
|
extern void nfs4_close_sync(struct nfs4_state *, fmode_t);
|
|
extern void nfs4_state_set_mode_locked(struct nfs4_state *, fmode_t);
|
|
extern void nfs_inode_find_state_and_recover(struct inode *inode,
|
|
const nfs4_stateid *stateid);
|
|
extern void nfs4_schedule_lease_recovery(struct nfs_client *);
|
|
extern void nfs4_schedule_state_manager(struct nfs_client *);
|
|
extern void nfs4_schedule_path_down_recovery(struct nfs_client *clp);
|
|
extern void nfs4_schedule_stateid_recovery(const struct nfs_server *, struct nfs4_state *);
|
|
extern void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags);
|
|
extern void nfs41_handle_recall_slot(struct nfs_client *clp);
|
|
extern void nfs41_handle_server_scope(struct nfs_client *,
|
|
struct nfs41_server_scope **);
|
|
extern void nfs4_put_lock_state(struct nfs4_lock_state *lsp);
|
|
extern int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl);
|
|
extern void nfs4_select_rw_stateid(nfs4_stateid *, struct nfs4_state *,
|
|
fmode_t, const struct nfs_lockowner *);
|
|
|
|
extern struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter, gfp_t gfp_mask);
|
|
extern int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task);
|
|
extern void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid);
|
|
extern void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid);
|
|
extern void nfs_release_seqid(struct nfs_seqid *seqid);
|
|
extern void nfs_free_seqid(struct nfs_seqid *seqid);
|
|
|
|
extern void nfs4_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp);
|
|
|
|
extern const nfs4_stateid zero_stateid;
|
|
|
|
/* nfs4super.c */
|
|
struct nfs_mount_info;
|
|
extern struct nfs_subversion nfs_v4;
|
|
struct dentry *nfs4_try_mount(int, const char *, struct nfs_mount_info *, struct nfs_subversion *);
|
|
extern bool nfs4_disable_idmapping;
|
|
extern unsigned short max_session_slots;
|
|
extern unsigned short send_implementation_id;
|
|
|
|
/* nfs4sysctl.c */
|
|
#ifdef CONFIG_SYSCTL
|
|
int nfs4_register_sysctl(void);
|
|
void nfs4_unregister_sysctl(void);
|
|
#else
|
|
static inline int nfs4_register_sysctl(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void nfs4_unregister_sysctl(void)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
/* nfs4xdr.c */
|
|
extern struct rpc_procinfo nfs4_procedures[];
|
|
|
|
struct nfs4_mount_data;
|
|
|
|
/* callback_xdr.c */
|
|
extern struct svc_version nfs4_callback_version1;
|
|
extern struct svc_version nfs4_callback_version4;
|
|
|
|
static inline void nfs4_stateid_copy(nfs4_stateid *dst, const nfs4_stateid *src)
|
|
{
|
|
memcpy(dst, src, sizeof(*dst));
|
|
}
|
|
|
|
static inline bool nfs4_stateid_match(const nfs4_stateid *dst, const nfs4_stateid *src)
|
|
{
|
|
return memcmp(dst, src, sizeof(*dst)) == 0;
|
|
}
|
|
|
|
#else
|
|
|
|
#define nfs4_close_state(a, b) do { } while (0)
|
|
#define nfs4_close_sync(a, b) do { } while (0)
|
|
|
|
#endif /* CONFIG_NFS_V4 */
|
|
#endif /* __LINUX_FS_NFS_NFS4_FS.H */
|