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>
127 lines
3.8 KiB
C
127 lines
3.8 KiB
C
#ifndef _NFS_FS_SB
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#define _NFS_FS_SB
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#include <linux/list.h>
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#include <linux/backing-dev.h>
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struct nfs_iostats;
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/*
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* The nfs_client identifies our client state to the server.
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*/
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struct nfs_client {
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atomic_t cl_count;
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int cl_cons_state; /* current construction state (-ve: init error) */
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#define NFS_CS_READY 0 /* ready to be used */
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#define NFS_CS_INITING 1 /* busy initialising */
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int cl_nfsversion; /* NFS protocol version */
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unsigned long cl_res_state; /* NFS resources state */
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#define NFS_CS_RPCIOD 0 /* - rpciod started */
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#define NFS_CS_CALLBACK 1 /* - callback started */
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#define NFS_CS_IDMAP 2 /* - idmap started */
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struct sockaddr_in cl_addr; /* server identifier */
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char * cl_hostname; /* hostname of server */
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struct list_head cl_share_link; /* link in global client list */
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struct list_head cl_superblocks; /* List of nfs_server structs */
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struct rpc_clnt * cl_rpcclient;
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#ifdef CONFIG_NFS_V4
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u64 cl_clientid; /* constant */
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nfs4_verifier cl_confirm;
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unsigned long cl_state;
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u32 cl_lockowner_id;
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/*
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* The following rwsem ensures exclusive access to the server
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* while we recover the state following a lease expiration.
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*/
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struct rw_semaphore cl_sem;
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struct list_head cl_delegations;
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struct list_head cl_state_owners;
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struct list_head cl_unused;
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int cl_nunused;
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spinlock_t cl_lock;
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unsigned long cl_lease_time;
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unsigned long cl_last_renewal;
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struct work_struct cl_renewd;
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struct work_struct cl_recoverd;
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struct rpc_wait_queue cl_rpcwaitq;
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/* used for the setclientid verifier */
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struct timespec cl_boot_time;
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/* idmapper */
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struct idmap * cl_idmap;
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/* Our own IP address, as a null-terminated string.
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* This is used to generate the clientid, and the callback address.
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*/
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char cl_ipaddr[16];
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unsigned char cl_id_uniquifier;
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#endif
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};
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/*
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* NFS client parameters stored in the superblock.
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*/
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struct nfs_server {
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struct rpc_clnt * client; /* RPC client handle */
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struct rpc_clnt * client_sys; /* 2nd handle for FSINFO */
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struct rpc_clnt * client_acl; /* ACL RPC client handle */
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struct nfs_rpc_ops * rpc_ops; /* NFS protocol vector */
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struct nfs_iostats * io_stats; /* I/O statistics */
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struct backing_dev_info backing_dev_info;
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int flags; /* various flags */
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unsigned int caps; /* server capabilities */
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unsigned int rsize; /* read size */
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unsigned int rpages; /* read size (in pages) */
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unsigned int wsize; /* write size */
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unsigned int wpages; /* write size (in pages) */
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unsigned int wtmult; /* server disk block size */
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unsigned int dtsize; /* readdir size */
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unsigned int bsize; /* server block size */
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unsigned int acregmin; /* attr cache timeouts */
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unsigned int acregmax;
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unsigned int acdirmin;
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unsigned int acdirmax;
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unsigned long retrans_timeo; /* retransmit timeout */
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unsigned int retrans_count; /* number of retransmit tries */
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unsigned int namelen;
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char * hostname; /* remote hostname */
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struct nfs_fh fh;
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struct sockaddr_in addr;
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struct nfs_fsid fsid;
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unsigned long mount_time; /* when this fs was mounted */
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#ifdef CONFIG_NFS_V4
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/* Our own IP address, as a null-terminated string.
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* This is used to generate the clientid, and the callback address.
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*/
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char ip_addr[16];
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char * mnt_path;
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struct nfs_client * nfs_client; /* all NFSv4 state starts here */
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struct list_head nfs4_siblings; /* List of other nfs_server structs
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* that share the same clientid
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*/
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u32 attr_bitmask[2];/* V4 bitmask representing the set
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of attributes supported on this
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filesystem */
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u32 acl_bitmask; /* V4 bitmask representing the ACEs
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that are supported on this
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filesystem */
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#endif
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};
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/* Server capabilities */
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#define NFS_CAP_READDIRPLUS (1U << 0)
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#define NFS_CAP_HARDLINKS (1U << 1)
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#define NFS_CAP_SYMLINKS (1U << 2)
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#define NFS_CAP_ACLS (1U << 3)
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#define NFS_CAP_ATOMIC_OPEN (1U << 4)
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#endif
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