82 lines
2.0 KiB
C
82 lines
2.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* include/linux/nfs_ssc.h
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*
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* Author: Dai Ngo <dai.ngo@oracle.com>
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*
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* Copyright (c) 2020, Oracle and/or its affiliates.
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*/
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#include <linux/nfs_fs.h>
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#include <linux/sunrpc/svc.h>
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extern struct nfs_ssc_client_ops_tbl nfs_ssc_client_tbl;
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/*
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* NFS_V4
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*/
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struct nfs4_ssc_client_ops {
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struct file *(*sco_open)(struct vfsmount *ss_mnt,
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struct nfs_fh *src_fh, nfs4_stateid *stateid);
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void (*sco_close)(struct file *filep);
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};
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/*
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* NFS_FS
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*/
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struct nfs_ssc_client_ops {
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void (*sco_sb_deactive)(struct super_block *sb);
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};
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struct nfs_ssc_client_ops_tbl {
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const struct nfs4_ssc_client_ops *ssc_nfs4_ops;
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const struct nfs_ssc_client_ops *ssc_nfs_ops;
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};
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extern void nfs42_ssc_register_ops(void);
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extern void nfs42_ssc_unregister_ops(void);
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extern void nfs42_ssc_register(const struct nfs4_ssc_client_ops *ops);
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extern void nfs42_ssc_unregister(const struct nfs4_ssc_client_ops *ops);
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#ifdef CONFIG_NFSD_V4_2_INTER_SSC
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static inline struct file *nfs42_ssc_open(struct vfsmount *ss_mnt,
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struct nfs_fh *src_fh, nfs4_stateid *stateid)
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{
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if (nfs_ssc_client_tbl.ssc_nfs4_ops)
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return (*nfs_ssc_client_tbl.ssc_nfs4_ops->sco_open)(ss_mnt, src_fh, stateid);
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return ERR_PTR(-EIO);
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}
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static inline void nfs42_ssc_close(struct file *filep)
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{
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if (nfs_ssc_client_tbl.ssc_nfs4_ops)
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(*nfs_ssc_client_tbl.ssc_nfs4_ops->sco_close)(filep);
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}
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struct nfsd4_ssc_umount_item {
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struct list_head nsui_list;
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bool nsui_busy;
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/*
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* nsui_refcnt inited to 2, 1 on list and 1 for consumer. Entry
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* is removed when refcnt drops to 1 and nsui_expire expires.
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*/
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refcount_t nsui_refcnt;
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unsigned long nsui_expire;
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struct vfsmount *nsui_vfsmount;
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char nsui_ipaddr[RPC_MAX_ADDRBUFLEN];
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};
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#endif
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/*
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* NFS_FS
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*/
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extern void nfs_ssc_register(const struct nfs_ssc_client_ops *ops);
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extern void nfs_ssc_unregister(const struct nfs_ssc_client_ops *ops);
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static inline void nfs_do_sb_deactive(struct super_block *sb)
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{
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if (nfs_ssc_client_tbl.ssc_nfs_ops)
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(*nfs_ssc_client_tbl.ssc_nfs_ops->sco_sb_deactive)(sb);
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}
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