1#ifndef _NFS_FS_SB 2#define _NFS_FS_SB 3 4#include <linux/list.h> 5#include <linux/backing-dev.h> 6#include <linux/wait.h> 7 8#include <asm/atomic.h> 9 10struct nfs_iostats; 11struct nlm_host; 12 13/* 14 * The nfs_client identifies our client state to the server. 15 */ 16struct nfs_client { 17 atomic_t cl_count; 18 int cl_cons_state; /* current construction state (-ve: init error) */ 19#define NFS_CS_READY 0 /* ready to be used */ 20#define NFS_CS_INITING 1 /* busy initialising */ 21 unsigned long cl_res_state; /* NFS resources state */ 22#define NFS_CS_CALLBACK 1 /* - callback started */ 23#define NFS_CS_IDMAP 2 /* - idmap started */ 24#define NFS_CS_RENEWD 3 /* - renewd started */ 25 struct sockaddr_storage cl_addr; /* server identifier */ 26 size_t cl_addrlen; 27 char * cl_hostname; /* hostname of server */ 28 struct list_head cl_share_link; /* link in global client list */ 29 struct list_head cl_superblocks; /* List of nfs_server structs */ 30 31 struct rpc_clnt * cl_rpcclient; 32 const struct nfs_rpc_ops *rpc_ops; /* NFS protocol vector */ 33 int cl_proto; /* Network transport protocol */ 34 35 struct rpc_cred *cl_machine_cred; 36 37#ifdef CONFIG_NFS_V4 38 u64 cl_clientid; /* constant */ 39 nfs4_verifier cl_confirm; 40 unsigned long cl_state; 41 42 struct rb_root cl_openowner_id; 43 struct rb_root cl_lockowner_id; 44 45 /* 46 * The following rwsem ensures exclusive access to the server 47 * while we recover the state following a lease expiration. 48 */ 49 struct rw_semaphore cl_sem; 50 51 struct list_head cl_delegations; 52 struct rb_root cl_state_owners; 53 spinlock_t cl_lock; 54 55 unsigned long cl_lease_time; 56 unsigned long cl_last_renewal; 57 struct delayed_work cl_renewd; 58 59 struct rpc_wait_queue cl_rpcwaitq; 60 61 /* used for the setclientid verifier */ 62 struct timespec cl_boot_time; 63 64 /* idmapper */ 65 struct idmap * cl_idmap; 66 67 /* Our own IP address, as a null-terminated string. 68 * This is used to generate the clientid, and the callback address. 69 */ 70 char cl_ipaddr[48]; 71 unsigned char cl_id_uniquifier; 72#endif 73}; 74 75/* 76 * NFS client parameters stored in the superblock. 77 */ 78struct nfs_server { 79 struct nfs_client * nfs_client; /* shared client and NFS4 state */ 80 struct list_head client_link; /* List of other nfs_server structs 81 * that share the same client 82 */ 83 struct list_head master_link; /* link in master servers list */ 84 struct rpc_clnt * client; /* RPC client handle */ 85 struct rpc_clnt * client_acl; /* ACL RPC client handle */ 86 struct nlm_host *nlm_host; /* NLM client handle */ 87 struct nfs_iostats * io_stats; /* I/O statistics */ 88 struct backing_dev_info backing_dev_info; 89 atomic_long_t writeback; /* number of writeback pages */ 90 int flags; /* various flags */ 91 unsigned int caps; /* server capabilities */ 92 unsigned int rsize; /* read size */ 93 unsigned int rpages; /* read size (in pages) */ 94 unsigned int wsize; /* write size */ 95 unsigned int wpages; /* write size (in pages) */ 96 unsigned int wtmult; /* server disk block size */ 97 unsigned int dtsize; /* readdir size */ 98 unsigned short port; /* "port=" setting */ 99 unsigned int bsize; /* server block size */ 100 unsigned int acregmin; /* attr cache timeouts */ 101 unsigned int acregmax; 102 unsigned int acdirmin; 103 unsigned int acdirmax; 104 unsigned int namelen; 105 106 struct nfs_fsid fsid; 107 __u64 maxfilesize; /* maximum file size */ 108 unsigned long mount_time; /* when this fs was mounted */ 109 dev_t s_dev; /* superblock dev numbers */ 110 111#ifdef CONFIG_NFS_V4 112 u32 attr_bitmask[2];/* V4 bitmask representing the set 113 of attributes supported on this 114 filesystem */ 115 u32 acl_bitmask; /* V4 bitmask representing the ACEs 116 that are supported on this 117 filesystem */ 118#endif 119 void (*destroy)(struct nfs_server *); 120 121 atomic_t active; /* Keep trace of any activity to this server */ 122 wait_queue_head_t active_wq; /* Wait for any activity to stop */ 123 124 /* mountd-related mount options */ 125 struct sockaddr_storage mountd_address; 126 size_t mountd_addrlen; 127 u32 mountd_version; 128 unsigned short mountd_port; 129 unsigned short mountd_protocol; 130}; 131 132/* Server capabilities */ 133#define NFS_CAP_READDIRPLUS (1U << 0) 134#define NFS_CAP_HARDLINKS (1U << 1) 135#define NFS_CAP_SYMLINKS (1U << 2) 136#define NFS_CAP_ACLS (1U << 3) 137#define NFS_CAP_ATOMIC_OPEN (1U << 4) 138 139#endif 140