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