#ifndef _LINUX_NFS_XDR_H
#define _LINUX_NFS_XDR_H
-#include <linux/sunrpc/xprt.h>
#include <linux/nfsacl.h>
+#include <linux/nfs3.h>
/*
* To change the maximum rsize and wsize supported by the NFS client, adjust
}
struct nfs_fattr {
- unsigned short valid; /* which fields are valid */
- __u64 pre_size; /* pre_op_attr.size */
- struct timespec pre_mtime; /* pre_op_attr.mtime */
- struct timespec pre_ctime; /* pre_op_attr.ctime */
- enum nfs_ftype type; /* always use NFSv2 types */
- __u32 mode;
+ unsigned int valid; /* which fields are valid */
+ umode_t mode;
__u32 nlink;
__u32 uid;
__u32 gid;
+ dev_t rdev;
__u64 size;
union {
struct {
__u64 used;
} nfs3;
} du;
- dev_t rdev;
struct nfs_fsid fsid;
__u64 fileid;
struct timespec atime;
struct timespec mtime;
struct timespec ctime;
- __u32 bitmap[2]; /* NFSv4 returned attribute bitmap */
__u64 change_attr; /* NFSv4 change attribute */
__u64 pre_change_attr;/* pre-op NFSv4 change attribute */
+ __u64 pre_size; /* pre_op_attr.size */
+ struct timespec pre_mtime; /* pre_op_attr.mtime */
+ struct timespec pre_ctime; /* pre_op_attr.ctime */
unsigned long time_start;
-};
-
-#define NFS_ATTR_WCC 0x0001 /* pre-op WCC data */
-#define NFS_ATTR_FATTR 0x0002 /* post-op attributes */
-#define NFS_ATTR_FATTR_V3 0x0004 /* NFSv3 attributes */
-#define NFS_ATTR_FATTR_V4 0x0008 /* NFSv4 change attribute */
-#define NFS_ATTR_FATTR_V4_REFERRAL 0x0010 /* NFSv4 referral */
+ unsigned long gencount;
+};
+
+#define NFS_ATTR_FATTR_TYPE (1U << 0)
+#define NFS_ATTR_FATTR_MODE (1U << 1)
+#define NFS_ATTR_FATTR_NLINK (1U << 2)
+#define NFS_ATTR_FATTR_OWNER (1U << 3)
+#define NFS_ATTR_FATTR_GROUP (1U << 4)
+#define NFS_ATTR_FATTR_RDEV (1U << 5)
+#define NFS_ATTR_FATTR_SIZE (1U << 6)
+#define NFS_ATTR_FATTR_PRESIZE (1U << 7)
+#define NFS_ATTR_FATTR_BLOCKS_USED (1U << 8)
+#define NFS_ATTR_FATTR_SPACE_USED (1U << 9)
+#define NFS_ATTR_FATTR_FSID (1U << 10)
+#define NFS_ATTR_FATTR_FILEID (1U << 11)
+#define NFS_ATTR_FATTR_ATIME (1U << 12)
+#define NFS_ATTR_FATTR_MTIME (1U << 13)
+#define NFS_ATTR_FATTR_CTIME (1U << 14)
+#define NFS_ATTR_FATTR_PREMTIME (1U << 15)
+#define NFS_ATTR_FATTR_PRECTIME (1U << 16)
+#define NFS_ATTR_FATTR_CHANGE (1U << 17)
+#define NFS_ATTR_FATTR_PRECHANGE (1U << 18)
+#define NFS_ATTR_FATTR_V4_REFERRAL (1U << 19) /* NFSv4 referral */
+
+#define NFS_ATTR_FATTR (NFS_ATTR_FATTR_TYPE \
+ | NFS_ATTR_FATTR_MODE \
+ | NFS_ATTR_FATTR_NLINK \
+ | NFS_ATTR_FATTR_OWNER \
+ | NFS_ATTR_FATTR_GROUP \
+ | NFS_ATTR_FATTR_RDEV \
+ | NFS_ATTR_FATTR_SIZE \
+ | NFS_ATTR_FATTR_FSID \
+ | NFS_ATTR_FATTR_FILEID \
+ | NFS_ATTR_FATTR_ATIME \
+ | NFS_ATTR_FATTR_MTIME \
+ | NFS_ATTR_FATTR_CTIME)
+#define NFS_ATTR_FATTR_V2 (NFS_ATTR_FATTR \
+ | NFS_ATTR_FATTR_BLOCKS_USED)
+#define NFS_ATTR_FATTR_V3 (NFS_ATTR_FATTR \
+ | NFS_ATTR_FATTR_SPACE_USED)
+#define NFS_ATTR_FATTR_V4 (NFS_ATTR_FATTR \
+ | NFS_ATTR_FATTR_SPACE_USED \
+ | NFS_ATTR_FATTR_CHANGE)
/*
* Info on the file system
};
struct nfs_seqid;
+
+/* nfs41 sessions channel attributes */
+struct nfs4_channel_attrs {
+ u32 headerpadsz;
+ u32 max_rqst_sz;
+ u32 max_resp_sz;
+ u32 max_resp_sz_cached;
+ u32 max_ops;
+ u32 max_reqs;
+};
+
+/* nfs41 sessions slot seqid */
+struct nfs4_slot {
+ u32 seq_nr;
+};
+
+struct nfs4_sequence_args {
+ struct nfs4_session *sa_session;
+ u8 sa_slotid;
+ u8 sa_cache_this;
+};
+
+struct nfs4_sequence_res {
+ struct nfs4_session *sr_session;
+ u8 sr_slotid; /* slot used to send request */
+ int sr_status; /* sequence operation status */
+ unsigned long sr_renewal_time;
+ u32 sr_status_flags;
+};
+
+struct nfs4_get_lease_time_args {
+ struct nfs4_sequence_args la_seq_args;
+};
+
+struct nfs4_get_lease_time_res {
+ struct nfs_fsinfo *lr_fsinfo;
+ struct nfs4_sequence_res lr_seq_res;
+};
+
/*
* Arguments to the open call.
*/
const struct nfs_fh * fh;
struct nfs_seqid * seqid;
int open_flags;
+ fmode_t fmode;
__u64 clientid;
- __u32 id;
+ __u64 id;
union {
struct iattr * attrs; /* UNCHECKED, GUARDED */
nfs4_verifier verifier; /* EXCLUSIVE */
nfs4_stateid delegation; /* CLAIM_DELEGATE_CUR */
- int delegation_type; /* CLAIM_PREVIOUS */
+ fmode_t delegation_type; /* CLAIM_PREVIOUS */
} u;
const struct qstr * name;
const struct nfs_server *server; /* Needed for ID mapping */
const u32 * bitmask;
__u32 claim;
+ struct nfs4_sequence_args seq_args;
};
struct nfs_openres {
__u32 rflags;
struct nfs_fattr * f_attr;
struct nfs_fattr * dir_attr;
+ struct nfs_seqid * seqid;
const struct nfs_server *server;
- int delegation_type;
+ fmode_t delegation_type;
nfs4_stateid delegation;
__u32 do_recall;
__u64 maxsize;
+ __u32 attrset[NFS4_BITMAP_SIZE];
+ struct nfs4_sequence_res seq_res;
};
/*
struct nfs_open_confirmres {
nfs4_stateid stateid;
+ struct nfs_seqid * seqid;
};
/*
struct nfs_fh * fh;
nfs4_stateid * stateid;
struct nfs_seqid * seqid;
- int open_flags;
+ fmode_t fmode;
const u32 * bitmask;
+ struct nfs4_sequence_args seq_args;
};
struct nfs_closeres {
nfs4_stateid stateid;
struct nfs_fattr * fattr;
+ struct nfs_seqid * seqid;
const struct nfs_server *server;
+ struct nfs4_sequence_res seq_res;
};
/*
* * Arguments to the lock,lockt, and locku call.
* */
struct nfs_lowner {
__u64 clientid;
- u32 id;
+ __u64 id;
};
struct nfs_lock_args {
unsigned char block : 1;
unsigned char reclaim : 1;
unsigned char new_lock_owner : 1;
+ struct nfs4_sequence_args seq_args;
};
struct nfs_lock_res {
- nfs4_stateid stateid;
+ nfs4_stateid stateid;
+ struct nfs_seqid * lock_seqid;
+ struct nfs_seqid * open_seqid;
+ struct nfs4_sequence_res seq_res;
};
struct nfs_locku_args {
struct file_lock * fl;
struct nfs_seqid * seqid;
nfs4_stateid * stateid;
+ struct nfs4_sequence_args seq_args;
};
struct nfs_locku_res {
- nfs4_stateid stateid;
+ nfs4_stateid stateid;
+ struct nfs_seqid * seqid;
+ struct nfs4_sequence_res seq_res;
};
struct nfs_lockt_args {
struct nfs_fh * fh;
struct file_lock * fl;
struct nfs_lowner lock_owner;
+ struct nfs4_sequence_args seq_args;
};
struct nfs_lockt_res {
struct file_lock * denied; /* LOCK, LOCKT failed */
+ struct nfs4_sequence_res seq_res;
};
struct nfs4_delegreturnargs {
const struct nfs_fh *fhandle;
const nfs4_stateid *stateid;
const u32 * bitmask;
+ struct nfs4_sequence_args seq_args;
};
struct nfs4_delegreturnres {
struct nfs_fattr * fattr;
const struct nfs_server *server;
+ struct nfs4_sequence_res seq_res;
};
/*
__u32 count;
unsigned int pgbase;
struct page ** pages;
+ struct nfs4_sequence_args seq_args;
};
struct nfs_readres {
struct nfs_fattr * fattr;
__u32 count;
int eof;
+ struct nfs4_sequence_res seq_res;
};
/*
unsigned int pgbase;
struct page ** pages;
const u32 * bitmask;
+ struct nfs4_sequence_args seq_args;
};
struct nfs_writeverf {
enum nfs3_stable_how committed;
- __u32 verifier[2];
+ __be32 verifier[2];
};
struct nfs_writeres {
struct nfs_writeverf * verf;
__u32 count;
const struct nfs_server *server;
+ struct nfs4_sequence_res seq_res;
+};
+
+/*
+ * Common arguments to the unlink call
+ */
+struct nfs_removeargs {
+ const struct nfs_fh *fh;
+ struct qstr name;
+ const u32 * bitmask;
+ struct nfs4_sequence_args seq_args;
+};
+
+struct nfs_removeres {
+ const struct nfs_server *server;
+ struct nfs4_change_info cinfo;
+ struct nfs_fattr dir_attr;
+ struct nfs4_sequence_res seq_res;
};
/*
struct iattr * iap;
const struct nfs_server * server; /* Needed for name mapping */
const u32 * bitmask;
+ struct nfs4_sequence_args seq_args;
};
struct nfs_setaclargs {
size_t acl_len;
unsigned int acl_pgbase;
struct page ** acl_pages;
+ struct nfs4_sequence_args seq_args;
+};
+
+struct nfs_setaclres {
+ struct nfs4_sequence_res seq_res;
};
struct nfs_getaclargs {
size_t acl_len;
unsigned int acl_pgbase;
struct page ** acl_pages;
+ struct nfs4_sequence_args seq_args;
+};
+
+struct nfs_getaclres {
+ size_t acl_len;
+ struct nfs4_sequence_res seq_res;
};
struct nfs_setattrres {
struct nfs_fattr * fattr;
const struct nfs_server * server;
+ struct nfs4_sequence_res seq_res;
};
struct nfs_linkargs {
struct nfs_fh * fromfh;
const char * fromname;
unsigned int fromlen;
- const char * topath;
- unsigned int tolen;
+ struct page ** pages;
+ unsigned int pathlen;
struct iattr * sattr;
};
int mask;
struct posix_acl * acl_access;
struct posix_acl * acl_default;
+ size_t len;
+ unsigned int npages;
struct page ** pages;
};
unsigned int len;
struct iattr * sattr;
enum nfs3_createmode createmode;
- __u32 verifier[2];
+ __be32 verifier[2];
};
struct nfs3_mkdirargs {
struct nfs_fh * fromfh;
const char * fromname;
unsigned int fromlen;
- const char * topath;
- unsigned int tolen;
+ struct page ** pages;
+ unsigned int pathlen;
struct iattr * sattr;
};
struct nfs3_readdirargs {
struct nfs_fh * fh;
__u64 cookie;
- __u32 verf[2];
+ __be32 verf[2];
int plus;
unsigned int count;
struct page ** pages;
struct nfs3_readdirres {
struct nfs_fattr * dir_attr;
- __u32 * verf;
+ __be32 * verf;
int plus;
};
struct nfs4_accessargs {
const struct nfs_fh * fh;
+ const u32 * bitmask;
u32 access;
+ struct nfs4_sequence_args seq_args;
};
struct nfs4_accessres {
+ const struct nfs_server * server;
+ struct nfs_fattr * fattr;
u32 supported;
u32 access;
+ struct nfs4_sequence_res seq_res;
};
struct nfs4_create_arg {
u32 ftype;
union {
- struct qstr * symlink; /* NF4LNK */
+ struct {
+ struct page ** pages;
+ unsigned int len;
+ } symlink; /* NF4LNK */
struct {
u32 specdata1;
u32 specdata2;
const struct iattr * attrs;
const struct nfs_fh * dir_fh;
const u32 * bitmask;
+ struct nfs4_sequence_args seq_args;
};
struct nfs4_create_res {
struct nfs_fattr * fattr;
struct nfs4_change_info dir_cinfo;
struct nfs_fattr * dir_fattr;
+ struct nfs4_sequence_res seq_res;
};
struct nfs4_fsinfo_arg {
const struct nfs_fh * fh;
const u32 * bitmask;
+ struct nfs4_sequence_args seq_args;
+};
+
+struct nfs4_fsinfo_res {
+ struct nfs_fsinfo *fsinfo;
+ struct nfs4_sequence_res seq_res;
};
struct nfs4_getattr_arg {
const struct nfs_fh * fh;
const u32 * bitmask;
+ struct nfs4_sequence_args seq_args;
};
struct nfs4_getattr_res {
const struct nfs_server * server;
struct nfs_fattr * fattr;
+ struct nfs4_sequence_res seq_res;
};
struct nfs4_link_arg {
const struct nfs_fh * dir_fh;
const struct qstr * name;
const u32 * bitmask;
+ struct nfs4_sequence_args seq_args;
};
struct nfs4_link_res {
struct nfs_fattr * fattr;
struct nfs4_change_info cinfo;
struct nfs_fattr * dir_attr;
+ struct nfs4_sequence_res seq_res;
};
const struct nfs_fh * dir_fh;
const struct qstr * name;
const u32 * bitmask;
+ struct nfs4_sequence_args seq_args;
};
struct nfs4_lookup_res {
const struct nfs_server * server;
struct nfs_fattr * fattr;
struct nfs_fh * fh;
+ struct nfs4_sequence_res seq_res;
};
struct nfs4_lookup_root_arg {
const u32 * bitmask;
+ struct nfs4_sequence_args seq_args;
};
struct nfs4_pathconf_arg {
const struct nfs_fh * fh;
const u32 * bitmask;
+ struct nfs4_sequence_args seq_args;
+};
+
+struct nfs4_pathconf_res {
+ struct nfs_pathconf *pathconf;
+ struct nfs4_sequence_res seq_res;
};
struct nfs4_readdir_arg {
struct page ** pages; /* zero-copy data */
unsigned int pgbase; /* zero-copy data */
const u32 * bitmask;
+ struct nfs4_sequence_args seq_args;
};
struct nfs4_readdir_res {
nfs4_verifier verifier;
unsigned int pgbase;
+ struct nfs4_sequence_res seq_res;
};
struct nfs4_readlink {
unsigned int pgbase;
unsigned int pglen; /* zero-copy data */
struct page ** pages; /* zero-copy data */
+ struct nfs4_sequence_args seq_args;
};
-struct nfs4_remove_arg {
- const struct nfs_fh * fh;
- const struct qstr * name;
- const u32 * bitmask;
-};
-
-struct nfs4_remove_res {
- const struct nfs_server * server;
- struct nfs4_change_info cinfo;
- struct nfs_fattr * dir_attr;
+struct nfs4_readlink_res {
+ struct nfs4_sequence_res seq_res;
};
struct nfs4_rename_arg {
const struct qstr * old_name;
const struct qstr * new_name;
const u32 * bitmask;
+ struct nfs4_sequence_args seq_args;
};
struct nfs4_rename_res {
struct nfs_fattr * old_fattr;
struct nfs4_change_info new_cinfo;
struct nfs_fattr * new_fattr;
+ struct nfs4_sequence_res seq_res;
};
+#define NFS4_SETCLIENTID_NAMELEN (127)
struct nfs4_setclientid {
- const nfs4_verifier * sc_verifier; /* request */
+ const nfs4_verifier * sc_verifier;
unsigned int sc_name_len;
- char sc_name[32]; /* request */
- u32 sc_prog; /* request */
+ char sc_name[NFS4_SETCLIENTID_NAMELEN + 1];
+ u32 sc_prog;
unsigned int sc_netid_len;
- char sc_netid[4]; /* request */
+ char sc_netid[RPCBIND_MAXNETIDLEN + 1];
unsigned int sc_uaddr_len;
- char sc_uaddr[24]; /* request */
- u32 sc_cb_ident; /* request */
+ char sc_uaddr[RPCBIND_MAXUADDRLEN + 1];
+ u32 sc_cb_ident;
};
struct nfs4_statfs_arg {
const struct nfs_fh * fh;
const u32 * bitmask;
+ struct nfs4_sequence_args seq_args;
+};
+
+struct nfs4_statfs_res {
+ struct nfs_fsstat *fsstat;
+ struct nfs4_sequence_res seq_res;
+};
+
+struct nfs4_server_caps_arg {
+ struct nfs_fh *fhandle;
+ struct nfs4_sequence_args seq_args;
};
struct nfs4_server_caps_res {
u32 acl_bitmask;
u32 has_links;
u32 has_symlinks;
+ struct nfs4_sequence_res seq_res;
};
struct nfs4_string {
const struct qstr *name;
struct page *page;
const u32 *bitmask;
+ struct nfs4_sequence_args seq_args;
+};
+
+struct nfs4_fs_locations_res {
+ struct nfs4_fs_locations *fs_locations;
+ struct nfs4_sequence_res seq_res;
};
#endif /* CONFIG_NFS_V4 */
+struct nfstime4 {
+ u64 seconds;
+ u32 nseconds;
+};
+
+#ifdef CONFIG_NFS_V4_1
+struct nfs_impl_id4 {
+ u32 domain_len;
+ char *domain;
+ u32 name_len;
+ char *name;
+ struct nfstime4 date;
+};
+
+#define NFS4_EXCHANGE_ID_LEN (48)
+struct nfs41_exchange_id_args {
+ struct nfs_client *client;
+ nfs4_verifier *verifier;
+ unsigned int id_len;
+ char id[NFS4_EXCHANGE_ID_LEN];
+ u32 flags;
+};
+
+struct server_owner {
+ uint64_t minor_id;
+ uint32_t major_id_sz;
+ char major_id[NFS4_OPAQUE_LIMIT];
+};
+
+struct server_scope {
+ uint32_t server_scope_sz;
+ char server_scope[NFS4_OPAQUE_LIMIT];
+};
+
+struct nfs41_exchange_id_res {
+ struct nfs_client *client;
+ u32 flags;
+};
+
+struct nfs41_create_session_args {
+ struct nfs_client *client;
+ uint32_t flags;
+ uint32_t cb_program;
+ struct nfs4_channel_attrs fc_attrs; /* Fore Channel */
+ struct nfs4_channel_attrs bc_attrs; /* Back Channel */
+};
+
+struct nfs41_create_session_res {
+ struct nfs_client *client;
+};
+
+struct nfs41_reclaim_complete_args {
+ /* In the future extend to include curr_fh for use with migration */
+ unsigned char one_fs:1;
+ struct nfs4_sequence_args seq_args;
+};
+
+struct nfs41_reclaim_complete_res {
+ struct nfs4_sequence_res seq_res;
+};
+#endif /* CONFIG_NFS_V4_1 */
+
struct nfs_page;
#define NFS_PAGEVEC_SIZE (8U)
struct list_head pages; /* Coalesced read requests */
struct nfs_page *req; /* multi ops per nfs_page */
struct page **pagevec;
- unsigned int npages; /* active pages in pagevec */
+ unsigned int npages; /* Max length of pagevec */
struct nfs_readargs args;
struct nfs_readres res;
#ifdef CONFIG_NFS_V4
struct list_head pages; /* Coalesced requests we wish to flush */
struct nfs_page *req; /* multi ops per nfs_page */
struct page **pagevec;
- unsigned int npages; /* active pages in pagevec */
+ unsigned int npages; /* Max length of pagevec */
struct nfs_writeargs args; /* argument struct */
struct nfs_writeres res; /* result struct */
#ifdef CONFIG_NFS_V4
* RPC procedure vector for NFSv2/NFSv3 demuxing
*/
struct nfs_rpc_ops {
- int version; /* Protocol version */
- struct dentry_operations *dentry_ops;
- struct inode_operations *dir_inode_ops;
- struct inode_operations *file_inode_ops;
+ u32 version; /* Protocol version */
+ const struct dentry_operations *dentry_ops;
+ const struct inode_operations *dir_inode_ops;
+ const struct inode_operations *file_inode_ops;
int (*getroot) (struct nfs_server *, struct nfs_fh *,
struct nfs_fsinfo *);
+ int (*lookupfh)(struct nfs_server *, struct nfs_fh *,
+ struct qstr *, struct nfs_fh *,
+ struct nfs_fattr *);
int (*getattr) (struct nfs_server *, struct nfs_fh *,
struct nfs_fattr *);
int (*setattr) (struct dentry *, struct nfs_fattr *,
int (*access) (struct inode *, struct nfs_access_entry *);
int (*readlink)(struct inode *, struct page *, unsigned int,
unsigned int);
- int (*read) (struct nfs_read_data *);
- int (*write) (struct nfs_write_data *);
- int (*commit) (struct nfs_write_data *);
int (*create) (struct inode *, struct dentry *,
struct iattr *, int, struct nameidata *);
int (*remove) (struct inode *, struct qstr *);
- int (*unlink_setup) (struct rpc_message *,
- struct dentry *, struct qstr *);
- int (*unlink_done) (struct dentry *, struct rpc_task *);
+ void (*unlink_setup) (struct rpc_message *, struct inode *dir);
+ int (*unlink_done) (struct rpc_task *, struct inode *);
int (*rename) (struct inode *, struct qstr *,
struct inode *, struct qstr *);
int (*link) (struct inode *, struct inode *, struct qstr *);
- int (*symlink) (struct inode *, struct qstr *, struct qstr *,
- struct iattr *, struct nfs_fh *,
- struct nfs_fattr *);
+ int (*symlink) (struct inode *, struct dentry *, struct page *,
+ unsigned int, struct iattr *);
int (*mkdir) (struct inode *, struct dentry *, struct iattr *);
int (*rmdir) (struct inode *, struct qstr *);
int (*readdir) (struct dentry *, struct rpc_cred *,
struct nfs_fsinfo *);
int (*pathconf) (struct nfs_server *, struct nfs_fh *,
struct nfs_pathconf *);
- u32 * (*decode_dirent)(u32 *, struct nfs_entry *, int plus);
- void (*read_setup) (struct nfs_read_data *);
+ int (*set_capabilities)(struct nfs_server *, struct nfs_fh *);
+ __be32 *(*decode_dirent)(__be32 *, struct nfs_entry *, int plus);
+ void (*read_setup) (struct nfs_read_data *, struct rpc_message *);
int (*read_done) (struct rpc_task *, struct nfs_read_data *);
- void (*write_setup) (struct nfs_write_data *, int how);
+ void (*write_setup) (struct nfs_write_data *, struct rpc_message *);
int (*write_done) (struct rpc_task *, struct nfs_write_data *);
- void (*commit_setup) (struct nfs_write_data *, int how);
+ void (*commit_setup) (struct nfs_write_data *, struct rpc_message *);
int (*commit_done) (struct rpc_task *, struct nfs_write_data *);
- int (*file_open) (struct inode *, struct file *);
- int (*file_release) (struct inode *, struct file *);
int (*lock)(struct file *, int, struct file_lock *);
+ int (*lock_check_bounds)(const struct file_lock *);
void (*clear_acl_cache)(struct inode *);
+ void (*close_context)(struct nfs_open_context *ctx, int);
};
/*
/*
* Function vectors etc. for the NFS client
*/
-extern struct nfs_rpc_ops nfs_v2_clientops;
-extern struct nfs_rpc_ops nfs_v3_clientops;
-extern struct nfs_rpc_ops nfs_v4_clientops;
+extern const struct nfs_rpc_ops nfs_v2_clientops;
+extern const struct nfs_rpc_ops nfs_v3_clientops;
+extern const struct nfs_rpc_ops nfs_v4_clientops;
extern struct rpc_version nfs_version2;
extern struct rpc_version nfs_version3;
extern struct rpc_version nfs_version4;