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