diff options
Diffstat (limited to 'include/linux/nfs_fs_sb.h')
| -rw-r--r-- | include/linux/nfs_fs_sb.h | 228 |
1 files changed, 228 insertions, 0 deletions
diff --git a/include/linux/nfs_fs_sb.h b/include/linux/nfs_fs_sb.h new file mode 100644 index 00000000..87694ca8 --- /dev/null +++ b/include/linux/nfs_fs_sb.h @@ -0,0 +1,228 @@ +#ifndef _NFS_FS_SB +#define _NFS_FS_SB + +#include <linux/list.h> +#include <linux/backing-dev.h> +#include <linux/wait.h> +#include <linux/nfs_xdr.h> +#include <linux/sunrpc/xprt.h> + +#include <asm/atomic.h> + +struct nfs4_session; +struct nfs_iostats; +struct nlm_host; +struct nfs4_sequence_args; +struct nfs4_sequence_res; +struct nfs_server; +struct nfs4_minor_version_ops; + +/* + * 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 */ +#define NFS_CS_SESSION_INITING 2 /* busy initialising session */ + unsigned long cl_res_state; /* NFS resources state */ +#define NFS_CS_CALLBACK 1 /* - callback started */ +#define NFS_CS_IDMAP 2 /* - idmap started */ +#define NFS_CS_RENEWD 3 /* - renewd started */ +#define NFS_CS_STOP_RENEW 4 /* no more state to renew */ +#define NFS_CS_CHECK_LEASE_TIME 5 /* need to check lease time */ + struct sockaddr_storage cl_addr; /* server identifier */ + size_t cl_addrlen; + 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; + const struct nfs_rpc_ops *rpc_ops; /* NFS protocol vector */ + int cl_proto; /* Network transport protocol */ + + u32 cl_minorversion;/* NFSv4 minorversion */ + struct rpc_cred *cl_machine_cred; + +#ifdef CONFIG_NFS_V4 + u64 cl_clientid; /* constant */ + nfs4_verifier cl_confirm; /* Clientid verifier */ + unsigned long cl_state; + + spinlock_t cl_lock; + + unsigned long cl_lease_time; + unsigned long cl_last_renewal; + struct delayed_work cl_renewd; + + 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[48]; + unsigned char cl_id_uniquifier; + u32 cl_cb_ident; /* v4.0 callback identifier */ + const struct nfs4_minor_version_ops *cl_mvops; + + /* The sequence id to use for the next CREATE_SESSION */ + u32 cl_seqid; + /* The flags used for obtaining the clientid during EXCHANGE_ID */ + u32 cl_exchange_flags; + struct nfs4_session *cl_session; /* sharred session */ + struct list_head cl_layouts; +#endif /* CONFIG_NFS_V4 */ + +#ifdef CONFIG_NFS_FSCACHE + struct fscache_cookie *fscache; /* client index cache cookie */ +#endif +}; + +/* + * NFS client parameters stored in the superblock. + */ +struct nfs_server { + struct nfs_client * nfs_client; /* shared client and NFS4 state */ + struct list_head client_link; /* List of other nfs_server structs + * that share the same client + */ + struct list_head master_link; /* link in master servers list */ + struct rpc_clnt * client; /* RPC client handle */ + struct rpc_clnt * client_acl; /* ACL RPC client handle */ + struct nlm_host *nlm_host; /* NLM client handle */ + struct nfs_iostats __percpu *io_stats; /* I/O statistics */ + struct backing_dev_info backing_dev_info; + atomic_long_t writeback; /* number of writeback pages */ + 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 short port; /* "port=" setting */ + unsigned int bsize; /* server block size */ + unsigned int acregmin; /* attr cache timeouts */ + unsigned int acregmax; + unsigned int acdirmin; + unsigned int acdirmax; + unsigned int namelen; + unsigned int options; /* extra options enabled by mount */ +#define NFS_OPTION_FSCACHE 0x00000001 /* - local caching enabled */ + + struct nfs_fsid fsid; + __u64 maxfilesize; /* maximum file size */ + struct timespec time_delta; /* smallest time granularity */ + unsigned long mount_time; /* when this fs was mounted */ + dev_t s_dev; /* superblock dev numbers */ + +#ifdef CONFIG_NFS_FSCACHE + struct nfs_fscache_key *fscache_key; /* unique key for superblock */ + struct fscache_cookie *fscache; /* superblock cookie */ +#endif + +#ifdef CONFIG_NFS_V4 + u32 attr_bitmask[2];/* V4 bitmask representing the set + of attributes supported on this + filesystem */ + u32 cache_consistency_bitmask[2]; + /* V4 bitmask representing the subset + of change attribute, size, ctime + and mtime attributes supported by + the server */ + u32 acl_bitmask; /* V4 bitmask representing the ACEs + that are supported on this + filesystem */ + struct pnfs_layoutdriver_type *pnfs_curr_ld; /* Active layout driver */ + struct rpc_wait_queue roc_rpcwaitq; + + /* the following fields are protected by nfs_client->cl_lock */ + struct rb_root state_owners; + struct rb_root openowner_id; + struct rb_root lockowner_id; +#endif + struct list_head delegations; + void (*destroy)(struct nfs_server *); + + atomic_t active; /* Keep trace of any activity to this server */ + + /* mountd-related mount options */ + struct sockaddr_storage mountd_address; + size_t mountd_addrlen; + u32 mountd_version; + unsigned short mountd_port; + unsigned short mountd_protocol; +}; + +/* 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) +#define NFS_CAP_CHANGE_ATTR (1U << 5) +#define NFS_CAP_FILEID (1U << 6) +#define NFS_CAP_MODE (1U << 7) +#define NFS_CAP_NLINK (1U << 8) +#define NFS_CAP_OWNER (1U << 9) +#define NFS_CAP_OWNER_GROUP (1U << 10) +#define NFS_CAP_ATIME (1U << 11) +#define NFS_CAP_CTIME (1U << 12) +#define NFS_CAP_MTIME (1U << 13) +#define NFS_CAP_POSIX_LOCK (1U << 14) +#define NFS_CAP_UIDGID_NOMAP (1U << 15) + + +/* maximum number of slots to use */ +#define NFS4_MAX_SLOT_TABLE RPC_MAX_SLOT_TABLE + +#if defined(CONFIG_NFS_V4) + +/* Sessions */ +#define SLOT_TABLE_SZ (NFS4_MAX_SLOT_TABLE/(8*sizeof(long))) +struct nfs4_slot_table { + struct nfs4_slot *slots; /* seqid per slot */ + unsigned long used_slots[SLOT_TABLE_SZ]; /* used/unused bitmap */ + spinlock_t slot_tbl_lock; + struct rpc_wait_queue slot_tbl_waitq; /* allocators may wait here */ + int max_slots; /* # slots in table */ + int highest_used_slotid; /* sent to server on each SEQ. + * op for dynamic resizing */ + int target_max_slots; /* Set by CB_RECALL_SLOT as + * the new max_slots */ + struct completion complete; +}; + +static inline int slot_idx(struct nfs4_slot_table *tbl, struct nfs4_slot *sp) +{ + return sp - tbl->slots; +} + +/* + * Session related parameters + */ +struct nfs4_session { + struct nfs4_sessionid sess_id; + u32 flags; + unsigned long session_state; + u32 hash_alg; + u32 ssv_len; + + /* The fore and back channel */ + struct nfs4_channel_attrs fc_attrs; + struct nfs4_slot_table fc_slot_table; + struct nfs4_channel_attrs bc_attrs; + struct nfs4_slot_table bc_slot_table; + struct nfs_client *clp; +}; + +#endif /* CONFIG_NFS_V4 */ +#endif |