24c8dbbb5f
Generalise the nfs_client structure by:
(1) Moving nfs_client to a more general place (nfs_fs_sb.h).
(2) Renaming its maintenance routines to be non-NFS4 specific.
(3) Move those maintenance routines to a new non-NFS4 specific file (client.c)
and move the declarations to internal.h.
(4) Make nfs_find/get_client() take a full sockaddr_in to include the port
number (will be required for NFS2/3).
(5) Make nfs_find/get_client() take the NFS protocol version (again will be
required to differentiate NFS2, 3 & 4 client records).
Also:
(6) Make nfs_client construction proceed akin to inodes, marking them as under
construction and providing a function to indicate completion.
(7) Make nfs_get_client() wait interruptibly if it finds a client that it can
share, but that client is currently being constructed.
(8) Make nfs4_create_client() use (6) and (7) instead of locking cl_sem.
Signed-Off-By: David Howells <dhowells@redhat.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
126 lines
3.8 KiB
C
126 lines
3.8 KiB
C
#ifndef _NFS_FS_SB
|
|
#define _NFS_FS_SB
|
|
|
|
#include <linux/list.h>
|
|
#include <linux/backing-dev.h>
|
|
|
|
struct nfs_iostats;
|
|
|
|
/*
|
|
* The nfs_client identifies our client state to the server.
|
|
*/
|
|
struct nfs_client {
|
|
atomic_t cl_count;
|
|
int cl_cons_state; /* current construction state (-ve: init error) */
|
|
#define NFS_CS_READY 0 /* ready to be used */
|
|
#define NFS_CS_INITING 1 /* busy initialising */
|
|
int cl_nfsversion; /* NFS protocol version */
|
|
unsigned long cl_res_state; /* NFS resources state */
|
|
#define NFS_CS_RPCIOD 0 /* - rpciod started */
|
|
#define NFS_CS_CALLBACK 1 /* - callback started */
|
|
#define NFS_CS_IDMAP 2 /* - idmap started */
|
|
struct sockaddr_in cl_addr; /* server identifier */
|
|
char * cl_hostname; /* hostname of server */
|
|
struct list_head cl_share_link; /* link in global client list */
|
|
struct list_head cl_superblocks; /* List of nfs_server structs */
|
|
|
|
struct rpc_clnt * cl_rpcclient;
|
|
|
|
#ifdef CONFIG_NFS_V4
|
|
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;
|
|
|
|
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;
|
|
#endif
|
|
};
|
|
|
|
/*
|
|
* NFS client parameters stored in the superblock.
|
|
*/
|
|
struct nfs_server {
|
|
struct rpc_clnt * client; /* RPC client handle */
|
|
struct rpc_clnt * client_sys; /* 2nd handle for FSINFO */
|
|
struct rpc_clnt * client_acl; /* ACL RPC client handle */
|
|
struct nfs_rpc_ops * rpc_ops; /* NFS protocol vector */
|
|
struct nfs_iostats * io_stats; /* I/O statistics */
|
|
struct backing_dev_info backing_dev_info;
|
|
int flags; /* various flags */
|
|
unsigned int caps; /* server capabilities */
|
|
unsigned int rsize; /* read size */
|
|
unsigned int rpages; /* read size (in pages) */
|
|
unsigned int wsize; /* write size */
|
|
unsigned int wpages; /* write size (in pages) */
|
|
unsigned int wtmult; /* server disk block size */
|
|
unsigned int dtsize; /* readdir size */
|
|
unsigned int bsize; /* server block size */
|
|
unsigned int acregmin; /* attr cache timeouts */
|
|
unsigned int acregmax;
|
|
unsigned int acdirmin;
|
|
unsigned int acdirmax;
|
|
unsigned long retrans_timeo; /* retransmit timeout */
|
|
unsigned int retrans_count; /* number of retransmit tries */
|
|
unsigned int namelen;
|
|
char * hostname; /* remote hostname */
|
|
struct nfs_fh fh;
|
|
struct sockaddr_in addr;
|
|
struct nfs_fsid fsid;
|
|
unsigned long mount_time; /* when this fs was mounted */
|
|
#ifdef CONFIG_NFS_V4
|
|
/* Our own IP address, as a null-terminated string.
|
|
* This is used to generate the clientid, and the callback address.
|
|
*/
|
|
char ip_addr[16];
|
|
char * mnt_path;
|
|
struct nfs_client * nfs_client; /* all NFSv4 state starts here */
|
|
struct list_head nfs4_siblings; /* List of other nfs_server structs
|
|
* that share the same clientid
|
|
*/
|
|
u32 attr_bitmask[2];/* V4 bitmask representing the set
|
|
of attributes supported on this
|
|
filesystem */
|
|
u32 acl_bitmask; /* V4 bitmask representing the ACEs
|
|
that are supported on this
|
|
filesystem */
|
|
#endif
|
|
};
|
|
|
|
/* Server capabilities */
|
|
#define NFS_CAP_READDIRPLUS (1U << 0)
|
|
#define NFS_CAP_HARDLINKS (1U << 1)
|
|
#define NFS_CAP_SYMLINKS (1U << 2)
|
|
#define NFS_CAP_ACLS (1U << 3)
|
|
#define NFS_CAP_ATOMIC_OPEN (1U << 4)
|
|
|
|
#endif
|