forked from luck/tmp_suning_uos_patched
1c6dcbe5ce
The SEEK operation is used when an application makes an lseek call with either the SEEK_HOLE or SEEK_DATA flags set. I fall back on nfs_file_llseek() if the server does not have SEEK support. Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
236 lines
8.0 KiB
C
236 lines
8.0 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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#include <linux/idr.h>
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#include <linux/wait.h>
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#include <linux/nfs_xdr.h>
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#include <linux/sunrpc/xprt.h>
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#include <linux/atomic.h>
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struct nfs4_session;
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struct nfs_iostats;
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struct nlm_host;
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struct nfs4_sequence_args;
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struct nfs4_sequence_res;
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struct nfs_server;
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struct nfs4_minor_version_ops;
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struct nfs41_server_scope;
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struct nfs41_impl_id;
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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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atomic_t cl_mds_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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#define NFS_CS_SESSION_INITING 2 /* busy initialising session */
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unsigned long cl_res_state; /* NFS resources state */
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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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#define NFS_CS_RENEWD 3 /* - renewd started */
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#define NFS_CS_STOP_RENEW 4 /* no more state to renew */
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#define NFS_CS_CHECK_LEASE_TIME 5 /* need to check lease time */
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unsigned long cl_flags; /* behavior switches */
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#define NFS_CS_NORESVPORT 0 /* - use ephemeral src port */
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#define NFS_CS_DISCRTRY 1 /* - disconnect on RPC retry */
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#define NFS_CS_MIGRATION 2 /* - transparent state migr */
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#define NFS_CS_INFINITE_SLOTS 3 /* - don't limit TCP slots */
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#define NFS_CS_NO_RETRANS_TIMEOUT 4 /* - Disable retransmit timeouts */
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struct sockaddr_storage cl_addr; /* server identifier */
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size_t cl_addrlen;
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char * cl_hostname; /* hostname of server */
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char * cl_acceptor; /* GSSAPI acceptor name */
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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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const struct nfs_rpc_ops *rpc_ops; /* NFS protocol vector */
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int cl_proto; /* Network transport protocol */
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struct nfs_subversion * cl_nfs_mod; /* pointer to nfs version module */
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u32 cl_minorversion;/* NFSv4 minorversion */
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struct rpc_cred *cl_machine_cred;
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#if IS_ENABLED(CONFIG_NFS_V4)
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struct list_head cl_ds_clients; /* auth flavor data servers */
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u64 cl_clientid; /* constant */
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nfs4_verifier cl_confirm; /* Clientid verifier */
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unsigned long cl_state;
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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 delayed_work cl_renewd;
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struct rpc_wait_queue cl_rpcwaitq;
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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 mv0 callback address.
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*/
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char cl_ipaddr[48];
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u32 cl_cb_ident; /* v4.0 callback identifier */
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const struct nfs4_minor_version_ops *cl_mvops;
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unsigned long cl_mig_gen;
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/* NFSv4.0 transport blocking */
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struct nfs4_slot_table *cl_slot_tbl;
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/* The sequence id to use for the next CREATE_SESSION */
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u32 cl_seqid;
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/* The flags used for obtaining the clientid during EXCHANGE_ID */
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u32 cl_exchange_flags;
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struct nfs4_session *cl_session; /* shared session */
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bool cl_preserve_clid;
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struct nfs41_server_owner *cl_serverowner;
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struct nfs41_server_scope *cl_serverscope;
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struct nfs41_impl_id *cl_implid;
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/* nfs 4.1+ state protection modes: */
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unsigned long cl_sp4_flags;
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#define NFS_SP4_MACH_CRED_MINIMAL 1 /* Minimal sp4_mach_cred - state ops
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* must use machine cred */
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#define NFS_SP4_MACH_CRED_CLEANUP 2 /* CLOSE and LOCKU */
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#define NFS_SP4_MACH_CRED_SECINFO 3 /* SECINFO and SECINFO_NO_NAME */
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#define NFS_SP4_MACH_CRED_STATEID 4 /* TEST_STATEID and FREE_STATEID */
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#define NFS_SP4_MACH_CRED_WRITE 5 /* WRITE */
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#define NFS_SP4_MACH_CRED_COMMIT 6 /* COMMIT */
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#endif /* CONFIG_NFS_V4 */
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#ifdef CONFIG_NFS_FSCACHE
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struct fscache_cookie *fscache; /* client index cache cookie */
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#endif
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struct net *cl_net;
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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 nfs_client * nfs_client; /* shared client and NFS4 state */
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struct list_head client_link; /* List of other nfs_server structs
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* that share the same client
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*/
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struct list_head master_link; /* link in master servers list */
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struct rpc_clnt * client; /* RPC client handle */
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struct rpc_clnt * client_acl; /* ACL RPC client handle */
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struct nlm_host *nlm_host; /* NLM client handle */
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struct nfs_iostats __percpu *io_stats; /* I/O statistics */
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struct backing_dev_info backing_dev_info;
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atomic_long_t writeback; /* number of writeback pages */
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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 short port; /* "port=" setting */
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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 int namelen;
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unsigned int options; /* extra options enabled by mount */
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#define NFS_OPTION_FSCACHE 0x00000001 /* - local caching enabled */
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#define NFS_OPTION_MIGRATION 0x00000002 /* - NFSv4 migration enabled */
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struct nfs_fsid fsid;
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__u64 maxfilesize; /* maximum file size */
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struct timespec time_delta; /* smallest time granularity */
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unsigned long mount_time; /* when this fs was mounted */
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struct super_block *super; /* VFS super block */
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dev_t s_dev; /* superblock dev numbers */
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struct nfs_auth_info auth_info; /* parsed auth flavors */
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#ifdef CONFIG_NFS_FSCACHE
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struct nfs_fscache_key *fscache_key; /* unique key for superblock */
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struct fscache_cookie *fscache; /* superblock cookie */
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#endif
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u32 pnfs_blksize; /* layout_blksize attr */
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#if IS_ENABLED(CONFIG_NFS_V4)
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u32 attr_bitmask[3];/* V4 bitmask representing the set
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of attributes supported on this
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filesystem */
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u32 attr_bitmask_nl[3];
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/* V4 bitmask representing the
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set of attributes supported
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on this filesystem excluding
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the label support bit. */
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u32 cache_consistency_bitmask[3];
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/* V4 bitmask representing the subset
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of change attribute, size, ctime
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and mtime attributes supported by
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the server */
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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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u32 fh_expire_type; /* V4 bitmask representing file
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handle volatility type for
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this filesystem */
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struct pnfs_layoutdriver_type *pnfs_curr_ld; /* Active layout driver */
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struct rpc_wait_queue roc_rpcwaitq;
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void *pnfs_ld_data; /* per mount point data */
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/* the following fields are protected by nfs_client->cl_lock */
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struct rb_root state_owners;
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#endif
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struct ida openowner_id;
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struct ida lockowner_id;
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struct list_head state_owners_lru;
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struct list_head layouts;
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struct list_head delegations;
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unsigned long mig_gen;
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unsigned long mig_status;
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#define NFS_MIG_IN_TRANSITION (1)
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#define NFS_MIG_FAILED (2)
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void (*destroy)(struct nfs_server *);
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atomic_t active; /* Keep trace of any activity to this server */
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/* mountd-related mount options */
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struct sockaddr_storage mountd_address;
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size_t mountd_addrlen;
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u32 mountd_version;
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unsigned short mountd_port;
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unsigned short mountd_protocol;
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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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#define NFS_CAP_CHANGE_ATTR (1U << 5)
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#define NFS_CAP_FILEID (1U << 6)
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#define NFS_CAP_MODE (1U << 7)
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#define NFS_CAP_NLINK (1U << 8)
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#define NFS_CAP_OWNER (1U << 9)
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#define NFS_CAP_OWNER_GROUP (1U << 10)
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#define NFS_CAP_ATIME (1U << 11)
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#define NFS_CAP_CTIME (1U << 12)
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#define NFS_CAP_MTIME (1U << 13)
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#define NFS_CAP_POSIX_LOCK (1U << 14)
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#define NFS_CAP_UIDGID_NOMAP (1U << 15)
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#define NFS_CAP_STATEID_NFSV41 (1U << 16)
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#define NFS_CAP_ATOMIC_OPEN_V1 (1U << 17)
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#define NFS_CAP_SECURITY_LABEL (1U << 18)
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#define NFS_CAP_SEEK (1U << 19)
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#endif
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