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673 lines
23 KiB
673 lines
23 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* linux/fs/nfs/nfs4_fs.h |
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* |
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* Copyright (C) 2005 Trond Myklebust |
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* |
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* NFSv4-specific filesystem definitions and declarations |
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*/ |
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#ifndef __LINUX_FS_NFS_NFS4_FS_H |
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#define __LINUX_FS_NFS_NFS4_FS_H |
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#if defined(CONFIG_NFS_V4_2) |
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#define NFS4_MAX_MINOR_VERSION 2 |
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#elif defined(CONFIG_NFS_V4_1) |
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#define NFS4_MAX_MINOR_VERSION 1 |
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#else |
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#define NFS4_MAX_MINOR_VERSION 0 |
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#endif |
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#if IS_ENABLED(CONFIG_NFS_V4) |
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#define NFS4_MAX_LOOP_ON_RECOVER (10) |
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#include <linux/seqlock.h> |
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struct idmap; |
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enum nfs4_client_state { |
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NFS4CLNT_MANAGER_RUNNING = 0, |
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NFS4CLNT_CHECK_LEASE, |
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NFS4CLNT_LEASE_EXPIRED, |
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NFS4CLNT_RECLAIM_REBOOT, |
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NFS4CLNT_RECLAIM_NOGRACE, |
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NFS4CLNT_DELEGRETURN, |
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NFS4CLNT_SESSION_RESET, |
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NFS4CLNT_LEASE_CONFIRM, |
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NFS4CLNT_SERVER_SCOPE_MISMATCH, |
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NFS4CLNT_PURGE_STATE, |
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NFS4CLNT_BIND_CONN_TO_SESSION, |
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NFS4CLNT_MOVED, |
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NFS4CLNT_LEASE_MOVED, |
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NFS4CLNT_DELEGATION_EXPIRED, |
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NFS4CLNT_RUN_MANAGER, |
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NFS4CLNT_MANAGER_AVAILABLE, |
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NFS4CLNT_RECALL_RUNNING, |
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NFS4CLNT_RECALL_ANY_LAYOUT_READ, |
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NFS4CLNT_RECALL_ANY_LAYOUT_RW, |
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NFS4CLNT_DELEGRETURN_DELAYED, |
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}; |
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#define NFS4_RENEW_TIMEOUT 0x01 |
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#define NFS4_RENEW_DELEGATION_CB 0x02 |
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struct nfs_seqid_counter; |
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struct nfs4_minor_version_ops { |
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u32 minor_version; |
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unsigned init_caps; |
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int (*init_client)(struct nfs_client *); |
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void (*shutdown_client)(struct nfs_client *); |
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bool (*match_stateid)(const nfs4_stateid *, |
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const nfs4_stateid *); |
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int (*find_root_sec)(struct nfs_server *, struct nfs_fh *, |
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struct nfs_fsinfo *); |
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void (*free_lock_state)(struct nfs_server *, |
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struct nfs4_lock_state *); |
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int (*test_and_free_expired)(struct nfs_server *, |
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nfs4_stateid *, const struct cred *); |
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struct nfs_seqid * |
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(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); |
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void (*session_trunk)(struct rpc_clnt *clnt, |
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struct rpc_xprt *xprt, void *data); |
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const struct rpc_call_ops *call_sync_ops; |
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const struct nfs4_state_recovery_ops *reboot_recovery_ops; |
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const struct nfs4_state_recovery_ops *nograce_recovery_ops; |
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const struct nfs4_state_maintenance_ops *state_renewal_ops; |
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const struct nfs4_mig_recovery_ops *mig_recovery_ops; |
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}; |
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#define NFS_SEQID_CONFIRMED 1 |
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struct nfs_seqid_counter { |
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ktime_t create_time; |
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int owner_id; |
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int flags; |
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u32 counter; |
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spinlock_t lock; /* Protects the list */ |
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struct list_head list; /* Defines sequence of RPC calls */ |
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struct rpc_wait_queue wait; /* RPC call delay queue */ |
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}; |
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struct nfs_seqid { |
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struct nfs_seqid_counter *sequence; |
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struct list_head list; |
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struct rpc_task *task; |
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}; |
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static inline void nfs_confirm_seqid(struct nfs_seqid_counter *seqid, int status) |
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{ |
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if (seqid_mutating_err(-status)) |
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seqid->flags |= NFS_SEQID_CONFIRMED; |
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} |
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/* |
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* NFS4 state_owners and lock_owners are simply labels for ordered |
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* sequences of RPC calls. Their sole purpose is to provide once-only |
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* semantics by allowing the server to identify replayed requests. |
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*/ |
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struct nfs4_state_owner { |
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struct nfs_server *so_server; |
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struct list_head so_lru; |
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unsigned long so_expires; |
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struct rb_node so_server_node; |
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const struct cred *so_cred; /* Associated cred */ |
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spinlock_t so_lock; |
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atomic_t so_count; |
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unsigned long so_flags; |
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struct list_head so_states; |
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struct nfs_seqid_counter so_seqid; |
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seqcount_spinlock_t so_reclaim_seqcount; |
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struct mutex so_delegreturn_mutex; |
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}; |
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enum { |
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NFS_OWNER_RECLAIM_REBOOT, |
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NFS_OWNER_RECLAIM_NOGRACE |
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}; |
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#define NFS_LOCK_NEW 0 |
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#define NFS_LOCK_RECLAIM 1 |
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#define NFS_LOCK_EXPIRED 2 |
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/* |
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* struct nfs4_state maintains the client-side state for a given |
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* (state_owner,inode) tuple (OPEN) or state_owner (LOCK). |
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* |
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* OPEN: |
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* In order to know when to OPEN_DOWNGRADE or CLOSE the state on the server, |
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* we need to know how many files are open for reading or writing on a |
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* given inode. This information too is stored here. |
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* |
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* LOCK: one nfs4_state (LOCK) to hold the lock stateid nfs4_state(OPEN) |
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*/ |
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struct nfs4_lock_state { |
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struct list_head ls_locks; /* Other lock stateids */ |
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struct nfs4_state * ls_state; /* Pointer to open state */ |
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#define NFS_LOCK_INITIALIZED 0 |
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#define NFS_LOCK_LOST 1 |
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unsigned long ls_flags; |
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struct nfs_seqid_counter ls_seqid; |
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nfs4_stateid ls_stateid; |
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refcount_t ls_count; |
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fl_owner_t ls_owner; |
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}; |
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/* bits for nfs4_state->flags */ |
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enum { |
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LK_STATE_IN_USE, |
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NFS_DELEGATED_STATE, /* Current stateid is delegation */ |
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NFS_OPEN_STATE, /* OPEN stateid is set */ |
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NFS_O_RDONLY_STATE, /* OPEN stateid has read-only state */ |
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NFS_O_WRONLY_STATE, /* OPEN stateid has write-only state */ |
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NFS_O_RDWR_STATE, /* OPEN stateid has read/write state */ |
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NFS_STATE_RECLAIM_REBOOT, /* OPEN stateid server rebooted */ |
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NFS_STATE_RECLAIM_NOGRACE, /* OPEN stateid needs to recover state */ |
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NFS_STATE_POSIX_LOCKS, /* Posix locks are supported */ |
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NFS_STATE_RECOVERY_FAILED, /* OPEN stateid state recovery failed */ |
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NFS_STATE_MAY_NOTIFY_LOCK, /* server may CB_NOTIFY_LOCK */ |
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NFS_STATE_CHANGE_WAIT, /* A state changing operation is outstanding */ |
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NFS_CLNT_DST_SSC_COPY_STATE, /* dst server open state on client*/ |
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NFS_CLNT_SRC_SSC_COPY_STATE, /* src server open state on client*/ |
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NFS_SRV_SSC_COPY_STATE, /* ssc state on the dst server */ |
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}; |
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struct nfs4_state { |
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struct list_head open_states; /* List of states for the same state_owner */ |
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struct list_head inode_states; /* List of states for the same inode */ |
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struct list_head lock_states; /* List of subservient lock stateids */ |
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struct nfs4_state_owner *owner; /* Pointer to the open owner */ |
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struct inode *inode; /* Pointer to the inode */ |
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unsigned long flags; /* Do we hold any locks? */ |
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spinlock_t state_lock; /* Protects the lock_states list */ |
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seqlock_t seqlock; /* Protects the stateid/open_stateid */ |
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nfs4_stateid stateid; /* Current stateid: may be delegation */ |
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nfs4_stateid open_stateid; /* OPEN stateid */ |
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/* The following 3 fields are protected by owner->so_lock */ |
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unsigned int n_rdonly; /* Number of read-only references */ |
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unsigned int n_wronly; /* Number of write-only references */ |
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unsigned int n_rdwr; /* Number of read/write references */ |
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fmode_t state; /* State on the server (R,W, or RW) */ |
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refcount_t count; |
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wait_queue_head_t waitq; |
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struct rcu_head rcu_head; |
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}; |
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struct nfs4_exception { |
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struct nfs4_state *state; |
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struct inode *inode; |
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nfs4_stateid *stateid; |
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long timeout; |
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unsigned char task_is_privileged : 1; |
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unsigned char delay : 1, |
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recovering : 1, |
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retry : 1; |
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bool interruptible; |
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}; |
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struct nfs4_state_recovery_ops { |
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int owner_flag_bit; |
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int state_flag_bit; |
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int (*recover_open)(struct nfs4_state_owner *, struct nfs4_state *); |
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int (*recover_lock)(struct nfs4_state *, struct file_lock *); |
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int (*establish_clid)(struct nfs_client *, const struct cred *); |
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int (*reclaim_complete)(struct nfs_client *, const struct cred *); |
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int (*detect_trunking)(struct nfs_client *, struct nfs_client **, |
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const struct cred *); |
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}; |
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struct nfs4_opendata { |
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struct kref kref; |
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struct nfs_openargs o_arg; |
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struct nfs_openres o_res; |
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struct nfs_open_confirmargs c_arg; |
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struct nfs_open_confirmres c_res; |
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struct nfs4_string owner_name; |
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struct nfs4_string group_name; |
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struct nfs4_label *a_label; |
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struct nfs_fattr f_attr; |
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struct dentry *dir; |
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struct dentry *dentry; |
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struct nfs4_state_owner *owner; |
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struct nfs4_state *state; |
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struct iattr attrs; |
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struct nfs4_layoutget *lgp; |
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unsigned long timestamp; |
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bool rpc_done; |
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bool file_created; |
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bool is_recover; |
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bool cancelled; |
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int rpc_status; |
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}; |
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struct nfs4_add_xprt_data { |
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struct nfs_client *clp; |
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const struct cred *cred; |
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}; |
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struct nfs4_state_maintenance_ops { |
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int (*sched_state_renewal)(struct nfs_client *, const struct cred *, unsigned); |
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const struct cred * (*get_state_renewal_cred)(struct nfs_client *); |
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int (*renew_lease)(struct nfs_client *, const struct cred *); |
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}; |
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struct nfs4_mig_recovery_ops { |
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int (*get_locations)(struct nfs_server *, struct nfs_fh *, |
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struct nfs4_fs_locations *, struct page *, const struct cred *); |
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int (*fsid_present)(struct inode *, const struct cred *); |
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}; |
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extern const struct dentry_operations nfs4_dentry_operations; |
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/* dir.c */ |
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int nfs_atomic_open(struct inode *, struct dentry *, struct file *, |
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unsigned, umode_t); |
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/* fs_context.c */ |
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extern struct file_system_type nfs4_fs_type; |
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/* nfs4namespace.c */ |
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struct rpc_clnt *nfs4_negotiate_security(struct rpc_clnt *, struct inode *, |
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const struct qstr *); |
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int nfs4_submount(struct fs_context *, struct nfs_server *); |
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int nfs4_replace_transport(struct nfs_server *server, |
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const struct nfs4_fs_locations *locations); |
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size_t nfs_parse_server_name(char *string, size_t len, struct sockaddr *sa, |
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size_t salen, struct net *net, int port); |
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/* nfs4proc.c */ |
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extern int nfs4_handle_exception(struct nfs_server *, int, struct nfs4_exception *); |
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extern int nfs4_async_handle_error(struct rpc_task *task, |
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struct nfs_server *server, |
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struct nfs4_state *state, long *timeout); |
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extern int nfs4_call_sync(struct rpc_clnt *, struct nfs_server *, |
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struct rpc_message *, struct nfs4_sequence_args *, |
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struct nfs4_sequence_res *, int); |
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extern void nfs4_init_sequence(struct nfs4_sequence_args *, struct nfs4_sequence_res *, int, int); |
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extern int nfs4_proc_setclientid(struct nfs_client *, u32, unsigned short, const struct cred *, struct nfs4_setclientid_res *); |
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extern int nfs4_proc_setclientid_confirm(struct nfs_client *, struct nfs4_setclientid_res *arg, const struct cred *); |
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extern int nfs4_proc_get_rootfh(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *, bool); |
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extern int nfs4_proc_bind_conn_to_session(struct nfs_client *, const struct cred *cred); |
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extern int nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred); |
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extern int nfs4_destroy_clientid(struct nfs_client *clp); |
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extern int nfs4_init_clientid(struct nfs_client *, const struct cred *); |
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extern int nfs41_init_clientid(struct nfs_client *, const struct cred *); |
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extern int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait); |
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extern int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle); |
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extern int nfs4_proc_fs_locations(struct rpc_clnt *, struct inode *, const struct qstr *, |
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struct nfs4_fs_locations *, struct page *); |
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extern int nfs4_proc_get_locations(struct nfs_server *, struct nfs_fh *, |
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struct nfs4_fs_locations *, |
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struct page *page, const struct cred *); |
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extern int nfs4_proc_fsid_present(struct inode *, const struct cred *); |
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extern struct rpc_clnt *nfs4_proc_lookup_mountpoint(struct inode *, |
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struct dentry *, |
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struct nfs_fh *, |
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struct nfs_fattr *); |
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extern int nfs4_proc_secinfo(struct inode *, const struct qstr *, struct nfs4_secinfo_flavors *); |
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extern const struct xattr_handler *nfs4_xattr_handlers[]; |
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extern int nfs4_set_rw_stateid(nfs4_stateid *stateid, |
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const struct nfs_open_context *ctx, |
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const struct nfs_lock_context *l_ctx, |
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fmode_t fmode); |
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extern void nfs4_bitmask_set(__u32 bitmask[], const __u32 src[], |
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struct inode *inode, unsigned long cache_validity); |
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extern int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, |
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struct nfs_fattr *fattr, struct inode *inode); |
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extern int update_open_stateid(struct nfs4_state *state, |
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const nfs4_stateid *open_stateid, |
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const nfs4_stateid *deleg_stateid, |
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fmode_t fmode); |
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extern int nfs4_proc_setlease(struct file *file, long arg, |
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struct file_lock **lease, void **priv); |
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extern int nfs4_proc_get_lease_time(struct nfs_client *clp, |
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struct nfs_fsinfo *fsinfo); |
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extern void nfs4_update_changeattr(struct inode *dir, |
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struct nfs4_change_info *cinfo, |
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unsigned long timestamp, |
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unsigned long cache_validity); |
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extern int nfs4_buf_to_pages_noslab(const void *buf, size_t buflen, |
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struct page **pages); |
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#if defined(CONFIG_NFS_V4_1) |
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extern int nfs41_sequence_done(struct rpc_task *, struct nfs4_sequence_res *); |
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extern int nfs4_proc_create_session(struct nfs_client *, const struct cred *); |
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extern int nfs4_proc_destroy_session(struct nfs4_session *, const struct cred *); |
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extern int nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, |
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bool sync); |
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extern int nfs4_detect_session_trunking(struct nfs_client *clp, |
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struct nfs41_exchange_id_res *res, struct rpc_xprt *xprt); |
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static inline bool |
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is_ds_only_client(struct nfs_client *clp) |
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{ |
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return (clp->cl_exchange_flags & EXCHGID4_FLAG_MASK_PNFS) == |
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EXCHGID4_FLAG_USE_PNFS_DS; |
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} |
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static inline bool |
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is_ds_client(struct nfs_client *clp) |
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{ |
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return clp->cl_exchange_flags & EXCHGID4_FLAG_USE_PNFS_DS; |
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} |
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static inline bool |
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_nfs4_state_protect(struct nfs_client *clp, unsigned long sp4_mode, |
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struct rpc_clnt **clntp, struct rpc_message *msg) |
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{ |
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rpc_authflavor_t flavor; |
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if (sp4_mode == NFS_SP4_MACH_CRED_CLEANUP || |
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sp4_mode == NFS_SP4_MACH_CRED_PNFS_CLEANUP) { |
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/* Using machine creds for cleanup operations |
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* is only relevent if the client credentials |
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* might expire. So don't bother for |
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* RPC_AUTH_UNIX. If file was only exported to |
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* sec=sys, the PUTFH would fail anyway. |
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*/ |
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if ((*clntp)->cl_auth->au_flavor == RPC_AUTH_UNIX) |
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return false; |
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} |
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if (test_bit(sp4_mode, &clp->cl_sp4_flags)) { |
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msg->rpc_cred = rpc_machine_cred(); |
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flavor = clp->cl_rpcclient->cl_auth->au_flavor; |
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WARN_ON_ONCE(flavor != RPC_AUTH_GSS_KRB5I && |
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flavor != RPC_AUTH_GSS_KRB5P); |
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*clntp = clp->cl_rpcclient; |
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return true; |
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} |
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return false; |
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} |
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/* |
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* Function responsible for determining if an rpc_message should use the |
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* machine cred under SP4_MACH_CRED and if so switching the credential and |
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* authflavor (using the nfs_client's rpc_clnt which will be krb5i/p). |
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* Should be called before rpc_call_sync/rpc_call_async. |
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*/ |
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static inline void |
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nfs4_state_protect(struct nfs_client *clp, unsigned long sp4_mode, |
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struct rpc_clnt **clntp, struct rpc_message *msg) |
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{ |
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_nfs4_state_protect(clp, sp4_mode, clntp, msg); |
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} |
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/* |
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* Special wrapper to nfs4_state_protect for write. |
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* If WRITE can use machine cred but COMMIT cannot, make sure all writes |
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* that use machine cred use NFS_FILE_SYNC. |
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*/ |
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static inline void |
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nfs4_state_protect_write(struct nfs_client *clp, struct rpc_clnt **clntp, |
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struct rpc_message *msg, struct nfs_pgio_header *hdr) |
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{ |
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if (_nfs4_state_protect(clp, NFS_SP4_MACH_CRED_WRITE, clntp, msg) && |
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!test_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags)) |
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hdr->args.stable = NFS_FILE_SYNC; |
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} |
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#else /* CONFIG_NFS_v4_1 */ |
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static inline bool |
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is_ds_only_client(struct nfs_client *clp) |
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{ |
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return false; |
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} |
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static inline bool |
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is_ds_client(struct nfs_client *clp) |
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{ |
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return false; |
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} |
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static inline void |
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nfs4_state_protect(struct nfs_client *clp, unsigned long sp4_flags, |
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struct rpc_clnt **clntp, struct rpc_message *msg) |
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{ |
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} |
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static inline void |
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nfs4_state_protect_write(struct nfs_client *clp, struct rpc_clnt **clntp, |
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struct rpc_message *msg, struct nfs_pgio_header *hdr) |
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{ |
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} |
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#endif /* CONFIG_NFS_V4_1 */ |
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extern const struct nfs4_minor_version_ops *nfs_v4_minor_ops[]; |
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extern const u32 nfs4_fattr_bitmap[3]; |
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extern const u32 nfs4_statfs_bitmap[3]; |
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extern const u32 nfs4_pathconf_bitmap[3]; |
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extern const u32 nfs4_fsinfo_bitmap[3]; |
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extern const u32 nfs4_fs_locations_bitmap[3]; |
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void nfs40_shutdown_client(struct nfs_client *); |
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void nfs41_shutdown_client(struct nfs_client *); |
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int nfs40_init_client(struct nfs_client *); |
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int nfs41_init_client(struct nfs_client *); |
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void nfs4_free_client(struct nfs_client *); |
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struct nfs_client *nfs4_alloc_client(const struct nfs_client_initdata *); |
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/* nfs4renewd.c */ |
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extern void nfs4_schedule_state_renewal(struct nfs_client *); |
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extern void nfs4_renewd_prepare_shutdown(struct nfs_server *); |
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extern void nfs4_kill_renewd(struct nfs_client *); |
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extern void nfs4_renew_state(struct work_struct *); |
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extern void nfs4_set_lease_period(struct nfs_client *clp, unsigned long lease); |
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/* nfs4state.c */ |
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extern const nfs4_stateid current_stateid; |
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const struct cred *nfs4_get_clid_cred(struct nfs_client *clp); |
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const struct cred *nfs4_get_machine_cred(struct nfs_client *clp); |
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const struct cred *nfs4_get_renew_cred(struct nfs_client *clp); |
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int nfs4_discover_server_trunking(struct nfs_client *clp, |
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struct nfs_client **); |
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int nfs40_discover_server_trunking(struct nfs_client *clp, |
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struct nfs_client **, const struct cred *); |
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#if defined(CONFIG_NFS_V4_1) |
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int nfs41_discover_server_trunking(struct nfs_client *clp, |
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struct nfs_client **, const struct cred *); |
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extern void nfs4_schedule_session_recovery(struct nfs4_session *, int); |
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extern void nfs41_notify_server(struct nfs_client *); |
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bool nfs4_check_serverowner_major_id(struct nfs41_server_owner *o1, |
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struct nfs41_server_owner *o2); |
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#else |
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static inline void nfs4_schedule_session_recovery(struct nfs4_session *session, int err) |
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{ |
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} |
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#endif /* CONFIG_NFS_V4_1 */ |
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|
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extern struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *, const struct cred *, gfp_t); |
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extern void nfs4_put_state_owner(struct nfs4_state_owner *); |
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extern void nfs4_purge_state_owners(struct nfs_server *, struct list_head *); |
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extern void nfs4_free_state_owners(struct list_head *head); |
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extern struct nfs4_state * nfs4_get_open_state(struct inode *, struct nfs4_state_owner *); |
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extern void nfs4_put_open_state(struct nfs4_state *); |
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extern void nfs4_close_state(struct nfs4_state *, fmode_t); |
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extern void nfs4_close_sync(struct nfs4_state *, fmode_t); |
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extern void nfs4_state_set_mode_locked(struct nfs4_state *, fmode_t); |
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extern void nfs_inode_find_state_and_recover(struct inode *inode, |
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const nfs4_stateid *stateid); |
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extern int nfs4_state_mark_reclaim_nograce(struct nfs_client *, struct nfs4_state *); |
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extern void nfs4_schedule_lease_recovery(struct nfs_client *); |
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extern int nfs4_wait_clnt_recover(struct nfs_client *clp); |
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extern int nfs4_client_recover_expired_lease(struct nfs_client *clp); |
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extern void nfs4_schedule_state_manager(struct nfs_client *); |
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extern void nfs4_schedule_path_down_recovery(struct nfs_client *clp); |
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extern int nfs4_schedule_stateid_recovery(const struct nfs_server *, struct nfs4_state *); |
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extern int nfs4_schedule_migration_recovery(const struct nfs_server *); |
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extern void nfs4_schedule_lease_moved_recovery(struct nfs_client *); |
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extern void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags, bool); |
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extern void nfs41_handle_server_scope(struct nfs_client *, |
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struct nfs41_server_scope **); |
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extern void nfs4_put_lock_state(struct nfs4_lock_state *lsp); |
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extern int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl); |
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extern int nfs4_select_rw_stateid(struct nfs4_state *, fmode_t, |
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const struct nfs_lock_context *, nfs4_stateid *, |
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const struct cred **); |
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extern bool nfs4_copy_open_stateid(nfs4_stateid *dst, |
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struct nfs4_state *state); |
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|
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extern struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter, gfp_t gfp_mask); |
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extern int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task); |
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extern void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid); |
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extern void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid); |
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extern void nfs_release_seqid(struct nfs_seqid *seqid); |
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extern void nfs_free_seqid(struct nfs_seqid *seqid); |
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extern int nfs4_setup_sequence(struct nfs_client *client, |
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struct nfs4_sequence_args *args, |
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struct nfs4_sequence_res *res, |
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struct rpc_task *task); |
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extern int nfs4_sequence_done(struct rpc_task *task, |
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struct nfs4_sequence_res *res); |
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|
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extern void nfs4_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp); |
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extern int nfs4_proc_commit(struct file *dst, __u64 offset, __u32 count, struct nfs_commitres *res); |
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extern const nfs4_stateid zero_stateid; |
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extern const nfs4_stateid invalid_stateid; |
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|
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/* nfs4super.c */ |
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struct nfs_mount_info; |
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extern struct nfs_subversion nfs_v4; |
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extern bool nfs4_disable_idmapping; |
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extern unsigned short max_session_slots; |
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extern unsigned short max_session_cb_slots; |
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extern unsigned short send_implementation_id; |
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extern bool recover_lost_locks; |
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|
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#define NFS4_CLIENT_ID_UNIQ_LEN (64) |
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extern char nfs4_client_id_uniquifier[NFS4_CLIENT_ID_UNIQ_LEN]; |
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|
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extern int nfs4_try_get_tree(struct fs_context *); |
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extern int nfs4_get_referral_tree(struct fs_context *); |
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|
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/* nfs4sysctl.c */ |
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#ifdef CONFIG_SYSCTL |
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int nfs4_register_sysctl(void); |
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void nfs4_unregister_sysctl(void); |
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#else |
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static inline int nfs4_register_sysctl(void) |
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{ |
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return 0; |
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} |
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|
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static inline void nfs4_unregister_sysctl(void) |
|
{ |
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} |
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#endif |
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|
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/* nfs4xdr.c */ |
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extern const struct rpc_procinfo nfs4_procedures[]; |
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|
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#ifdef CONFIG_NFS_V4_2 |
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extern const u32 nfs42_maxsetxattr_overhead; |
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extern const u32 nfs42_maxgetxattr_overhead; |
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extern const u32 nfs42_maxlistxattrs_overhead; |
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#endif |
|
|
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struct nfs4_mount_data; |
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|
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/* callback_xdr.c */ |
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extern const struct svc_version nfs4_callback_version1; |
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extern const struct svc_version nfs4_callback_version4; |
|
|
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static inline void nfs4_stateid_copy(nfs4_stateid *dst, const nfs4_stateid *src) |
|
{ |
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memcpy(dst->data, src->data, sizeof(dst->data)); |
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dst->type = src->type; |
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} |
|
|
|
static inline bool nfs4_stateid_match(const nfs4_stateid *dst, const nfs4_stateid *src) |
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{ |
|
if (dst->type != src->type) |
|
return false; |
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return memcmp(dst->data, src->data, sizeof(dst->data)) == 0; |
|
} |
|
|
|
static inline bool nfs4_stateid_match_other(const nfs4_stateid *dst, const nfs4_stateid *src) |
|
{ |
|
return memcmp(dst->other, src->other, NFS4_STATEID_OTHER_SIZE) == 0; |
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} |
|
|
|
static inline bool nfs4_stateid_is_newer(const nfs4_stateid *s1, const nfs4_stateid *s2) |
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{ |
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return (s32)(be32_to_cpu(s1->seqid) - be32_to_cpu(s2->seqid)) > 0; |
|
} |
|
|
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static inline bool nfs4_stateid_is_next(const nfs4_stateid *s1, const nfs4_stateid *s2) |
|
{ |
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u32 seq1 = be32_to_cpu(s1->seqid); |
|
u32 seq2 = be32_to_cpu(s2->seqid); |
|
|
|
return seq2 == seq1 + 1U || (seq2 == 1U && seq1 == 0xffffffffU); |
|
} |
|
|
|
static inline bool nfs4_stateid_match_or_older(const nfs4_stateid *dst, const nfs4_stateid *src) |
|
{ |
|
return nfs4_stateid_match_other(dst, src) && |
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!(src->seqid && nfs4_stateid_is_newer(dst, src)); |
|
} |
|
|
|
static inline void nfs4_stateid_seqid_inc(nfs4_stateid *s1) |
|
{ |
|
u32 seqid = be32_to_cpu(s1->seqid); |
|
|
|
if (++seqid == 0) |
|
++seqid; |
|
s1->seqid = cpu_to_be32(seqid); |
|
} |
|
|
|
static inline bool nfs4_valid_open_stateid(const struct nfs4_state *state) |
|
{ |
|
return test_bit(NFS_STATE_RECOVERY_FAILED, &state->flags) == 0; |
|
} |
|
|
|
static inline bool nfs4_state_match_open_stateid_other(const struct nfs4_state *state, |
|
const nfs4_stateid *stateid) |
|
{ |
|
return test_bit(NFS_OPEN_STATE, &state->flags) && |
|
nfs4_stateid_match_other(&state->open_stateid, stateid); |
|
} |
|
|
|
/* nfs42xattr.c */ |
|
#ifdef CONFIG_NFS_V4_2 |
|
extern int __init nfs4_xattr_cache_init(void); |
|
extern void nfs4_xattr_cache_exit(void); |
|
extern void nfs4_xattr_cache_add(struct inode *inode, const char *name, |
|
const char *buf, struct page **pages, |
|
ssize_t buflen); |
|
extern void nfs4_xattr_cache_remove(struct inode *inode, const char *name); |
|
extern ssize_t nfs4_xattr_cache_get(struct inode *inode, const char *name, |
|
char *buf, ssize_t buflen); |
|
extern void nfs4_xattr_cache_set_list(struct inode *inode, const char *buf, |
|
ssize_t buflen); |
|
extern ssize_t nfs4_xattr_cache_list(struct inode *inode, char *buf, |
|
ssize_t buflen); |
|
extern void nfs4_xattr_cache_zap(struct inode *inode); |
|
#else |
|
static inline void nfs4_xattr_cache_zap(struct inode *inode) |
|
{ |
|
} |
|
#endif /* CONFIG_NFS_V4_2 */ |
|
|
|
#else /* CONFIG_NFS_V4 */ |
|
|
|
#define nfs4_close_state(a, b) do { } while (0) |
|
#define nfs4_close_sync(a, b) do { } while (0) |
|
#define nfs4_state_protect(a, b, c, d) do { } while (0) |
|
#define nfs4_state_protect_write(a, b, c, d) do { } while (0) |
|
|
|
|
|
#endif /* CONFIG_NFS_V4 */ |
|
#endif /* __LINUX_FS_NFS_NFS4_FS.H */
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