313 lines
11 KiB
C
313 lines
11 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#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/nfslocalio.h>
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#include <linux/atomic.h>
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#include <linux/refcount.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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refcount_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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#define NFS_CS_TSM_POSSIBLE 5 /* - Maybe state migration */
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#define NFS_CS_NOPING 6 /* - don't ping on connect */
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#define NFS_CS_DS 7 /* - Server is a DS */
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#define NFS_CS_REUSEPORT 8 /* - reuse src port on reconnect */
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#define NFS_CS_PNFS 9 /* - Server used for pnfs */
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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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unsigned int cl_nconnect; /* Number of connections */
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unsigned int cl_max_connect; /* max number of xprts allowed */
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const char * cl_principal; /* used for machine cred */
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struct xprtsec_parms cl_xprtsec; /* xprt security policy */
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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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/* Client owner identifier */
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const char * cl_owner_id;
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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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#define NFS_SP4_MACH_CRED_PNFS_CLEANUP 7 /* LAYOUTRETURN */
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#if IS_ENABLED(CONFIG_NFS_V4_1)
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wait_queue_head_t cl_lock_waitq;
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#endif /* CONFIG_NFS_V4_1 */
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#endif /* 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 mv0 callback address.
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*/
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char cl_ipaddr[48];
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struct net *cl_net;
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struct list_head pending_cb_stateids;
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struct rcu_head rcu;
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#if IS_ENABLED(CONFIG_NFS_LOCALIO)
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struct timespec64 cl_nfssvc_boot;
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seqlock_t cl_boot_lock;
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nfs_uuid_t cl_uuid;
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struct work_struct cl_local_probe_work;
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#endif /* CONFIG_NFS_LOCALIO */
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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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wait_queue_head_t write_congestion_wait; /* wait until write congestion eases */
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atomic_long_t writeback; /* number of writeback pages */
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unsigned int write_congested;/* flag set when writeback gets too high */
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unsigned int flags; /* various flags */
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/* The following are for internal use only. Also see uapi/linux/nfs_mount.h */
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#define NFS_MOUNT_LOOKUP_CACHE_NONEG 0x10000
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#define NFS_MOUNT_LOOKUP_CACHE_NONE 0x20000
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#define NFS_MOUNT_NORESVPORT 0x40000
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#define NFS_MOUNT_LEGACY_INTERFACE 0x80000
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#define NFS_MOUNT_LOCAL_FLOCK 0x100000
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#define NFS_MOUNT_LOCAL_FCNTL 0x200000
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#define NFS_MOUNT_SOFTERR 0x400000
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#define NFS_MOUNT_SOFTREVAL 0x800000
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#define NFS_MOUNT_WRITE_EAGER 0x01000000
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#define NFS_MOUNT_WRITE_WAIT 0x02000000
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#define NFS_MOUNT_TRUNK_DISCOVERY 0x04000000
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#define NFS_MOUNT_SHUTDOWN 0x08000000
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#define NFS_MOUNT_NO_ALIGNWRITE 0x10000000
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unsigned int fattr_valid; /* Valid attributes */
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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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#ifdef CONFIG_NFS_V4_2
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unsigned int gxasize; /* getxattr size */
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unsigned int sxasize; /* setxattr size */
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unsigned int lxasize; /* listxattr size */
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#endif
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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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unsigned int clone_blksize; /* granularity of a CLONE operation */
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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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enum nfs4_change_attr_type
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change_attr_type;/* Description of change attribute */
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struct nfs_fsid fsid;
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int s_sysfs_id; /* sysfs dentry index */
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__u64 maxfilesize; /* maximum file size */
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struct timespec64 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 fscache_volume *fscache; /* superblock cookie */
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char *fscache_uniq; /* Uniquifier (or NULL) */
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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 exclcreat_bitmask[3];
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/* V4 bitmask representing the
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set of attributes supported
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on this filesystem for the
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exclusive create. */
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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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atomic64_t owner_ctr;
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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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struct list_head ss_copies;
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struct list_head ss_src_copies;
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unsigned long delegation_gen;
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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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#define NFS_MIG_TSM_POSSIBLE (3)
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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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struct rpc_wait_queue uoc_rpcwaitq;
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/* XDR related information */
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unsigned int read_hdrsize;
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/* User namespace info */
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const struct cred *cred;
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bool has_sec_mnt_opts;
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struct kobject kobj;
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struct rcu_head rcu;
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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_LGOPEN (1U << 5)
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#define NFS_CAP_CASE_INSENSITIVE (1U << 6)
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#define NFS_CAP_CASE_PRESERVING (1U << 7)
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#define NFS_CAP_REBOOT_LAYOUTRETURN (1U << 8)
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#define NFS_CAP_OPEN_XOR (1U << 12)
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#define NFS_CAP_DELEGTIME (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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#define NFS_CAP_ALLOCATE (1U << 20)
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#define NFS_CAP_DEALLOCATE (1U << 21)
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#define NFS_CAP_LAYOUTSTATS (1U << 22)
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#define NFS_CAP_CLONE (1U << 23)
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#define NFS_CAP_COPY (1U << 24)
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#define NFS_CAP_OFFLOAD_CANCEL (1U << 25)
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#define NFS_CAP_LAYOUTERROR (1U << 26)
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#define NFS_CAP_COPY_NOTIFY (1U << 27)
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#define NFS_CAP_XATTR (1U << 28)
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#define NFS_CAP_READ_PLUS (1U << 29)
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#define NFS_CAP_FS_LOCATIONS (1U << 30)
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#define NFS_CAP_MOVEABLE (1U << 31)
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#endif
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