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5970e15dbc
The file locking definitions have lived in fs.h since the dawn of time, but they are only used by a small subset of the source files that include it. Move the file locking definitions to a new header file, and add the appropriate #include directives to the source files that need them. By doing this we trim down fs.h a bit and limit the amount of rebuilding that has to be done when we make changes to the file locking APIs. Reviewed-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Christian Brauner (Microsoft) <brauner@kernel.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: David Howells <dhowells@redhat.com> Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk> Acked-by: Chuck Lever <chuck.lever@oracle.com> Acked-by: Joseph Qi <joseph.qi@linux.alibaba.com> Acked-by: Steve French <stfrench@microsoft.com> Acked-by: Al Viro <viro@zeniv.linux.org.uk> Acked-by: Darrick J. Wong <djwong@kernel.org> Signed-off-by: Jeff Layton <jlayton@kernel.org>
674 lines
23 KiB
C
674 lines
23 KiB
C
/* 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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#include <linux/filelock.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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#define NFS_LOCK_UNLOCKING 2
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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_storage *ss,
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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) &&
|
|
!test_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags))
|
|
hdr->args.stable = NFS_FILE_SYNC;
|
|
}
|
|
#else /* CONFIG_NFS_v4_1 */
|
|
static inline bool
|
|
is_ds_only_client(struct nfs_client *clp)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline bool
|
|
is_ds_client(struct nfs_client *clp)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline void
|
|
nfs4_state_protect(struct nfs_client *clp, unsigned long sp4_flags,
|
|
struct rpc_clnt **clntp, struct rpc_message *msg)
|
|
{
|
|
}
|
|
|
|
static inline void
|
|
nfs4_state_protect_write(struct nfs_client *clp, struct rpc_clnt **clntp,
|
|
struct rpc_message *msg, struct nfs_pgio_header *hdr)
|
|
{
|
|
}
|
|
#endif /* CONFIG_NFS_V4_1 */
|
|
|
|
extern const struct nfs4_minor_version_ops *nfs_v4_minor_ops[];
|
|
|
|
extern const u32 nfs4_fattr_bitmap[3];
|
|
extern const u32 nfs4_statfs_bitmap[3];
|
|
extern const u32 nfs4_pathconf_bitmap[3];
|
|
extern const u32 nfs4_fsinfo_bitmap[3];
|
|
extern const u32 nfs4_fs_locations_bitmap[3];
|
|
|
|
void nfs40_shutdown_client(struct nfs_client *);
|
|
void nfs41_shutdown_client(struct nfs_client *);
|
|
int nfs40_init_client(struct nfs_client *);
|
|
int nfs41_init_client(struct nfs_client *);
|
|
void nfs4_free_client(struct nfs_client *);
|
|
|
|
struct nfs_client *nfs4_alloc_client(const struct nfs_client_initdata *);
|
|
|
|
/* nfs4renewd.c */
|
|
extern void nfs4_schedule_state_renewal(struct nfs_client *);
|
|
extern void nfs4_kill_renewd(struct nfs_client *);
|
|
extern void nfs4_renew_state(struct work_struct *);
|
|
extern void nfs4_set_lease_period(struct nfs_client *clp, unsigned long lease);
|
|
|
|
|
|
/* nfs4state.c */
|
|
extern const nfs4_stateid current_stateid;
|
|
|
|
const struct cred *nfs4_get_clid_cred(struct nfs_client *clp);
|
|
const struct cred *nfs4_get_machine_cred(struct nfs_client *clp);
|
|
const struct cred *nfs4_get_renew_cred(struct nfs_client *clp);
|
|
int nfs4_discover_server_trunking(struct nfs_client *clp,
|
|
struct nfs_client **);
|
|
int nfs40_discover_server_trunking(struct nfs_client *clp,
|
|
struct nfs_client **, const struct cred *);
|
|
#if defined(CONFIG_NFS_V4_1)
|
|
int nfs41_discover_server_trunking(struct nfs_client *clp,
|
|
struct nfs_client **, const struct cred *);
|
|
extern void nfs4_schedule_session_recovery(struct nfs4_session *, int);
|
|
extern void nfs41_notify_server(struct nfs_client *);
|
|
bool nfs4_check_serverowner_major_id(struct nfs41_server_owner *o1,
|
|
struct nfs41_server_owner *o2);
|
|
#else
|
|
static inline void nfs4_schedule_session_recovery(struct nfs4_session *session, int err)
|
|
{
|
|
}
|
|
#endif /* CONFIG_NFS_V4_1 */
|
|
|
|
extern struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *, const struct cred *, gfp_t);
|
|
extern void nfs4_put_state_owner(struct nfs4_state_owner *);
|
|
extern void nfs4_purge_state_owners(struct nfs_server *, struct list_head *);
|
|
extern void nfs4_free_state_owners(struct list_head *head);
|
|
extern struct nfs4_state * nfs4_get_open_state(struct inode *, struct nfs4_state_owner *);
|
|
extern void nfs4_put_open_state(struct nfs4_state *);
|
|
extern void nfs4_close_state(struct nfs4_state *, fmode_t);
|
|
extern void nfs4_close_sync(struct nfs4_state *, fmode_t);
|
|
extern void nfs4_state_set_mode_locked(struct nfs4_state *, fmode_t);
|
|
extern void nfs_inode_find_state_and_recover(struct inode *inode,
|
|
const nfs4_stateid *stateid);
|
|
extern int nfs4_state_mark_reclaim_nograce(struct nfs_client *, struct nfs4_state *);
|
|
extern void nfs4_schedule_lease_recovery(struct nfs_client *);
|
|
extern int nfs4_wait_clnt_recover(struct nfs_client *clp);
|
|
extern int nfs4_client_recover_expired_lease(struct nfs_client *clp);
|
|
extern void nfs4_schedule_state_manager(struct nfs_client *);
|
|
extern void nfs4_schedule_path_down_recovery(struct nfs_client *clp);
|
|
extern int nfs4_schedule_stateid_recovery(const struct nfs_server *, struct nfs4_state *);
|
|
extern int nfs4_schedule_migration_recovery(const struct nfs_server *);
|
|
extern void nfs4_schedule_lease_moved_recovery(struct nfs_client *);
|
|
extern void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags, bool);
|
|
extern void nfs41_handle_server_scope(struct nfs_client *,
|
|
struct nfs41_server_scope **);
|
|
extern void nfs4_put_lock_state(struct nfs4_lock_state *lsp);
|
|
extern int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl);
|
|
extern int nfs4_select_rw_stateid(struct nfs4_state *, fmode_t,
|
|
const struct nfs_lock_context *, nfs4_stateid *,
|
|
const struct cred **);
|
|
extern bool nfs4_copy_open_stateid(nfs4_stateid *dst,
|
|
struct nfs4_state *state);
|
|
|
|
extern struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter, gfp_t gfp_mask);
|
|
extern int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task);
|
|
extern void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid);
|
|
extern void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid);
|
|
extern void nfs_release_seqid(struct nfs_seqid *seqid);
|
|
extern void nfs_free_seqid(struct nfs_seqid *seqid);
|
|
extern int nfs4_setup_sequence(struct nfs_client *client,
|
|
struct nfs4_sequence_args *args,
|
|
struct nfs4_sequence_res *res,
|
|
struct rpc_task *task);
|
|
extern int nfs4_sequence_done(struct rpc_task *task,
|
|
struct nfs4_sequence_res *res);
|
|
|
|
extern void nfs4_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp);
|
|
extern int nfs4_proc_commit(struct file *dst, __u64 offset, __u32 count, struct nfs_commitres *res);
|
|
extern const nfs4_stateid zero_stateid;
|
|
extern const nfs4_stateid invalid_stateid;
|
|
|
|
/* nfs4super.c */
|
|
struct nfs_mount_info;
|
|
extern struct nfs_subversion nfs_v4;
|
|
extern bool nfs4_disable_idmapping;
|
|
extern unsigned short max_session_slots;
|
|
extern unsigned short max_session_cb_slots;
|
|
extern unsigned short send_implementation_id;
|
|
extern bool recover_lost_locks;
|
|
|
|
#define NFS4_CLIENT_ID_UNIQ_LEN (64)
|
|
extern char nfs4_client_id_uniquifier[NFS4_CLIENT_ID_UNIQ_LEN];
|
|
|
|
extern int nfs4_try_get_tree(struct fs_context *);
|
|
extern int nfs4_get_referral_tree(struct fs_context *);
|
|
|
|
/* nfs4sysctl.c */
|
|
#ifdef CONFIG_SYSCTL
|
|
int nfs4_register_sysctl(void);
|
|
void nfs4_unregister_sysctl(void);
|
|
#else
|
|
static inline int nfs4_register_sysctl(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void nfs4_unregister_sysctl(void)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
/* nfs4xdr.c */
|
|
extern const struct rpc_procinfo nfs4_procedures[];
|
|
|
|
#ifdef CONFIG_NFS_V4_2
|
|
extern const u32 nfs42_maxsetxattr_overhead;
|
|
extern const u32 nfs42_maxgetxattr_overhead;
|
|
extern const u32 nfs42_maxlistxattrs_overhead;
|
|
#endif
|
|
|
|
struct nfs4_mount_data;
|
|
|
|
/* callback_xdr.c */
|
|
extern const struct svc_version nfs4_callback_version1;
|
|
extern const struct svc_version nfs4_callback_version4;
|
|
|
|
static inline void nfs4_stateid_copy(nfs4_stateid *dst, const nfs4_stateid *src)
|
|
{
|
|
memcpy(dst->data, src->data, sizeof(dst->data));
|
|
dst->type = src->type;
|
|
}
|
|
|
|
static inline bool nfs4_stateid_match(const nfs4_stateid *dst, const nfs4_stateid *src)
|
|
{
|
|
if (dst->type != src->type)
|
|
return false;
|
|
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;
|
|
}
|
|
|
|
static inline bool nfs4_stateid_is_newer(const nfs4_stateid *s1, const nfs4_stateid *s2)
|
|
{
|
|
return (s32)(be32_to_cpu(s1->seqid) - be32_to_cpu(s2->seqid)) > 0;
|
|
}
|
|
|
|
static inline bool nfs4_stateid_is_next(const nfs4_stateid *s1, const nfs4_stateid *s2)
|
|
{
|
|
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) &&
|
|
!(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 */
|