![Trond Myklebust](/assets/img/avatar_default.png)
Use a cred from the nfs4_client->cl_state_owners list. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
283 lines
9 KiB
C
283 lines
9 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
|
|
|
|
#ifdef CONFIG_NFS_V4
|
|
|
|
struct idmap;
|
|
|
|
/*
|
|
* In a seqid-mutating op, this macro controls which error return
|
|
* values trigger incrementation of the seqid.
|
|
*
|
|
* from rfc 3010:
|
|
* The client MUST monotonically increment the sequence number for the
|
|
* CLOSE, LOCK, LOCKU, OPEN, OPEN_CONFIRM, and OPEN_DOWNGRADE
|
|
* operations. This is true even in the event that the previous
|
|
* operation that used the sequence number received an error. The only
|
|
* exception to this rule is if the previous operation received one of
|
|
* the following errors: NFSERR_STALE_CLIENTID, NFSERR_STALE_STATEID,
|
|
* NFSERR_BAD_STATEID, NFSERR_BAD_SEQID, NFSERR_BADXDR,
|
|
* NFSERR_RESOURCE, NFSERR_NOFILEHANDLE.
|
|
*
|
|
*/
|
|
#define seqid_mutating_err(err) \
|
|
(((err) != NFSERR_STALE_CLIENTID) && \
|
|
((err) != NFSERR_STALE_STATEID) && \
|
|
((err) != NFSERR_BAD_STATEID) && \
|
|
((err) != NFSERR_BAD_SEQID) && \
|
|
((err) != NFSERR_BAD_XDR) && \
|
|
((err) != NFSERR_RESOURCE) && \
|
|
((err) != NFSERR_NOFILEHANDLE))
|
|
|
|
enum nfs4_client_state {
|
|
NFS4CLNT_STATE_RECOVER = 0,
|
|
NFS4CLNT_LEASE_EXPIRED,
|
|
};
|
|
|
|
/*
|
|
* The nfs4_client identifies our client state to the server.
|
|
*/
|
|
struct nfs4_client {
|
|
struct list_head cl_servers; /* Global list of servers */
|
|
struct in_addr cl_addr; /* Server identifier */
|
|
u64 cl_clientid; /* constant */
|
|
nfs4_verifier cl_confirm;
|
|
unsigned long cl_state;
|
|
|
|
u32 cl_lockowner_id;
|
|
|
|
/*
|
|
* The following rwsem ensures exclusive access to the server
|
|
* while we recover the state following a lease expiration.
|
|
*/
|
|
struct rw_semaphore cl_sem;
|
|
|
|
struct list_head cl_delegations;
|
|
struct list_head cl_state_owners;
|
|
struct list_head cl_unused;
|
|
int cl_nunused;
|
|
spinlock_t cl_lock;
|
|
atomic_t cl_count;
|
|
|
|
struct rpc_clnt * cl_rpcclient;
|
|
|
|
struct list_head cl_superblocks; /* List of nfs_server structs */
|
|
|
|
unsigned long cl_lease_time;
|
|
unsigned long cl_last_renewal;
|
|
struct work_struct cl_renewd;
|
|
struct work_struct cl_recoverd;
|
|
|
|
struct rpc_wait_queue cl_rpcwaitq;
|
|
|
|
/* used for the setclientid verifier */
|
|
struct timespec cl_boot_time;
|
|
|
|
/* idmapper */
|
|
struct idmap * cl_idmap;
|
|
|
|
/* Our own IP address, as a null-terminated string.
|
|
* This is used to generate the clientid, and the callback address.
|
|
*/
|
|
char cl_ipaddr[16];
|
|
unsigned char cl_id_uniquifier;
|
|
};
|
|
|
|
/*
|
|
* struct rpc_sequence ensures that RPC calls are sent in the exact
|
|
* order that they appear on the list.
|
|
*/
|
|
struct rpc_sequence {
|
|
struct rpc_wait_queue wait; /* RPC call delay queue */
|
|
spinlock_t lock; /* Protects the list */
|
|
struct list_head list; /* Defines sequence of RPC calls */
|
|
};
|
|
|
|
#define NFS_SEQID_CONFIRMED 1
|
|
struct nfs_seqid_counter {
|
|
struct rpc_sequence *sequence;
|
|
int flags;
|
|
u32 counter;
|
|
};
|
|
|
|
struct nfs_seqid {
|
|
struct nfs_seqid_counter *sequence;
|
|
struct list_head list;
|
|
};
|
|
|
|
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 {
|
|
spinlock_t so_lock;
|
|
struct list_head so_list; /* per-clientid list of state_owners */
|
|
struct nfs4_client *so_client;
|
|
u32 so_id; /* 32-bit identifier, unique */
|
|
atomic_t so_count;
|
|
|
|
struct rpc_cred *so_cred; /* Associated cred */
|
|
struct list_head so_states;
|
|
struct list_head so_delegations;
|
|
struct nfs_seqid_counter so_seqid;
|
|
struct rpc_sequence so_sequence;
|
|
};
|
|
|
|
/*
|
|
* 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_state {
|
|
struct list_head ls_locks; /* Other lock stateids */
|
|
struct nfs4_state * ls_state; /* Pointer to open state */
|
|
fl_owner_t ls_owner; /* POSIX lock owner */
|
|
#define NFS_LOCK_INITIALIZED 1
|
|
int ls_flags;
|
|
struct nfs_seqid_counter ls_seqid;
|
|
u32 ls_id;
|
|
nfs4_stateid ls_stateid;
|
|
atomic_t ls_count;
|
|
};
|
|
|
|
/* bits for nfs4_state->flags */
|
|
enum {
|
|
LK_STATE_IN_USE,
|
|
NFS_DELEGATED_STATE,
|
|
};
|
|
|
|
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 */
|
|
|
|
nfs4_stateid stateid;
|
|
|
|
unsigned int n_rdonly;
|
|
unsigned int n_wronly;
|
|
unsigned int n_rdwr;
|
|
int state; /* State on the server (R,W, or RW) */
|
|
atomic_t count;
|
|
};
|
|
|
|
|
|
struct nfs4_exception {
|
|
long timeout;
|
|
int retry;
|
|
};
|
|
|
|
struct nfs4_state_recovery_ops {
|
|
int (*recover_open)(struct nfs4_state_owner *, struct nfs4_state *);
|
|
int (*recover_lock)(struct nfs4_state *, struct file_lock *);
|
|
};
|
|
|
|
extern struct dentry_operations nfs4_dentry_operations;
|
|
extern struct inode_operations nfs4_dir_inode_operations;
|
|
|
|
/* inode.c */
|
|
extern ssize_t nfs4_getxattr(struct dentry *, const char *, void *, size_t);
|
|
extern int nfs4_setxattr(struct dentry *, const char *, const void *, size_t, int);
|
|
extern ssize_t nfs4_listxattr(struct dentry *, char *, size_t);
|
|
|
|
|
|
/* nfs4proc.c */
|
|
extern int nfs4_map_errors(int err);
|
|
extern int nfs4_proc_setclientid(struct nfs4_client *, u32, unsigned short, struct rpc_cred *);
|
|
extern int nfs4_proc_setclientid_confirm(struct nfs4_client *, struct rpc_cred *);
|
|
extern int nfs4_proc_async_renew(struct nfs4_client *, struct rpc_cred *);
|
|
extern int nfs4_proc_renew(struct nfs4_client *, struct rpc_cred *);
|
|
extern int nfs4_do_close(struct inode *inode, struct nfs4_state *state);
|
|
extern struct dentry *nfs4_atomic_open(struct inode *, struct dentry *, struct nameidata *);
|
|
extern int nfs4_open_revalidate(struct inode *, struct dentry *, int, struct nameidata *);
|
|
|
|
extern struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops;
|
|
extern struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops;
|
|
|
|
extern const u32 nfs4_fattr_bitmap[2];
|
|
extern const u32 nfs4_statfs_bitmap[2];
|
|
extern const u32 nfs4_pathconf_bitmap[2];
|
|
extern const u32 nfs4_fsinfo_bitmap[2];
|
|
|
|
/* nfs4renewd.c */
|
|
extern void nfs4_schedule_state_renewal(struct nfs4_client *);
|
|
extern void nfs4_renewd_prepare_shutdown(struct nfs_server *);
|
|
extern void nfs4_kill_renewd(struct nfs4_client *);
|
|
extern void nfs4_renew_state(void *);
|
|
|
|
/* nfs4state.c */
|
|
extern void init_nfsv4_state(struct nfs_server *);
|
|
extern void destroy_nfsv4_state(struct nfs_server *);
|
|
extern struct nfs4_client *nfs4_get_client(struct in_addr *);
|
|
extern void nfs4_put_client(struct nfs4_client *clp);
|
|
extern struct nfs4_client *nfs4_find_client(struct in_addr *);
|
|
struct rpc_cred *nfs4_get_renew_cred(struct nfs4_client *clp);
|
|
extern u32 nfs4_alloc_lockowner_id(struct nfs4_client *);
|
|
|
|
extern struct nfs4_state_owner * nfs4_get_state_owner(struct nfs_server *, struct rpc_cred *);
|
|
extern void nfs4_put_state_owner(struct nfs4_state_owner *);
|
|
extern void nfs4_drop_state_owner(struct nfs4_state_owner *);
|
|
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 *, mode_t);
|
|
extern void nfs4_state_set_mode_locked(struct nfs4_state *, mode_t);
|
|
extern void nfs4_schedule_state_recovery(struct nfs4_client *);
|
|
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_copy_stateid(nfs4_stateid *, struct nfs4_state *, fl_owner_t);
|
|
|
|
extern struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter);
|
|
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_free_seqid(struct nfs_seqid *seqid);
|
|
|
|
extern const nfs4_stateid zero_stateid;
|
|
|
|
/* nfs4xdr.c */
|
|
extern uint32_t *nfs4_decode_dirent(uint32_t *p, struct nfs_entry *entry, int plus);
|
|
extern struct rpc_procinfo nfs4_procedures[];
|
|
|
|
struct nfs4_mount_data;
|
|
|
|
/* callback_xdr.c */
|
|
extern struct svc_version nfs4_callback_version1;
|
|
|
|
#else
|
|
|
|
#define init_nfsv4_state(server) do { } while (0)
|
|
#define destroy_nfsv4_state(server) do { } while (0)
|
|
#define nfs4_put_state_owner(inode, owner) do { } while (0)
|
|
#define nfs4_put_open_state(state) do { } while (0)
|
|
#define nfs4_close_state(a, b) do { } while (0)
|
|
|
|
#endif /* CONFIG_NFS_V4 */
|
|
#endif /* __LINUX_FS_NFS_NFS4_FS.H */
|