/* * pNFS client data structures. * * Copyright (c) 2002 * The Regents of the University of Michigan * All Rights Reserved * * Dean Hildebrand <dhildebz@umich.edu> * * Permission is granted to use, copy, create derivative works, and * redistribute this software and such derivative works for any purpose, * so long as the name of the University of Michigan is not used in * any advertising or publicity pertaining to the use or distribution * of this software without specific, written prior authorization. If * the above copyright notice or any other identification of the * University of Michigan is included in any copy of any portion of * this software, then the disclaimer below must also be included. * * This software is provided as is, without representation or warranty * of any kind either express or implied, including without limitation * the implied warranties of merchantability, fitness for a particular * purpose, or noninfringement. The Regents of the University of * Michigan shall not be liable for any damages, including special, * indirect, incidental, or consequential damages, with respect to any * claim arising out of or in connection with the use of the software, * even if it has been or is hereafter advised of the possibility of * such damages. */ #ifndef FS_NFS_PNFS_H #define FS_NFS_PNFS_H #include <linux/nfs_fs.h> #include <linux/nfs_page.h> #include <linux/workqueue.h> enum { NFS_LSEG_VALID = 0, /* cleared when lseg is recalled/returned */ NFS_LSEG_ROC, /* roc bit received from server */ NFS_LSEG_LAYOUTCOMMIT, /* layoutcommit bit set for layoutcommit */ NFS_LSEG_LAYOUTRETURN, /* layoutreturn bit set for layoutreturn */ }; /* Individual ip address */ struct nfs4_pnfs_ds_addr { struct sockaddr_storage da_addr; size_t da_addrlen; struct list_head da_node; /* nfs4_pnfs_dev_hlist dev_dslist */ char *da_remotestr; /* human readable addr+port */ }; struct nfs4_pnfs_ds { struct list_head ds_node; /* nfs4_pnfs_dev_hlist dev_dslist */ char *ds_remotestr; /* comma sep list of addrs */ struct list_head ds_addrs; struct nfs_client *ds_clp; atomic_t ds_count; unsigned long ds_state; #define NFS4DS_CONNECTING 0 /* ds is establishing connection */ }; struct pnfs_layout_segment { struct list_head pls_list; struct list_head pls_lc_list; struct pnfs_layout_range pls_range; atomic_t pls_refcount; u32 pls_seq; unsigned long pls_flags; struct pnfs_layout_hdr *pls_layout; struct work_struct pls_work; }; enum pnfs_try_status { PNFS_ATTEMPTED = 0, PNFS_NOT_ATTEMPTED = 1, PNFS_TRY_AGAIN = 2, }; #ifdef CONFIG_NFS_V4_1 #define LAYOUT_NFSV4_1_MODULE_PREFIX "nfs-layouttype4" /* * Default data server connection timeout and retrans vaules. * Set by module parameters dataserver_timeo and dataserver_retrans. */ #define NFS4_DEF_DS_TIMEO 600 /* in tenths of a second */ #define NFS4_DEF_DS_RETRANS 5 /* error codes for internal use */ #define NFS4ERR_RESET_TO_MDS 12001 #define NFS4ERR_RESET_TO_PNFS 12002 enum { NFS_LAYOUT_RO_FAILED = 0, /* get ro layout failed stop trying */ NFS_LAYOUT_RW_FAILED, /* get rw layout failed stop trying */ NFS_LAYOUT_BULK_RECALL, /* bulk recall affecting layout */ NFS_LAYOUT_RETURN, /* layoutreturn in progress */ NFS_LAYOUT_RETURN_REQUESTED, /* Return this layout ASAP */ NFS_LAYOUT_INVALID_STID, /* layout stateid id is invalid */ NFS_LAYOUT_FIRST_LAYOUTGET, /* Serialize first layoutget */ }; enum layoutdriver_policy_flags { /* Should the pNFS client commit and return the layout upon truncate to * a smaller size */ PNFS_LAYOUTRET_ON_SETATTR = 1 << 0, PNFS_LAYOUTRET_ON_ERROR = 1 << 1, PNFS_READ_WHOLE_PAGE = 1 << 2, }; struct nfs4_deviceid_node; /* Per-layout driver specific registration structure */ struct pnfs_layoutdriver_type { struct list_head pnfs_tblid; const u32 id; const char *name; struct module *owner; unsigned flags; unsigned max_deviceinfo_size; int (*set_layoutdriver) (struct nfs_server *, const struct nfs_fh *); int (*clear_layoutdriver) (struct nfs_server *); struct pnfs_layout_hdr * (*alloc_layout_hdr) (struct inode *inode, gfp_t gfp_flags); void (*free_layout_hdr) (struct pnfs_layout_hdr *); struct pnfs_layout_segment * (*alloc_lseg) (struct pnfs_layout_hdr *layoutid, struct nfs4_layoutget_res *lgr, gfp_t gfp_flags); void (*free_lseg) (struct pnfs_layout_segment *lseg); void (*add_lseg) (struct pnfs_layout_hdr *layoutid, struct pnfs_layout_segment *lseg, struct list_head *free_me); void (*return_range) (struct pnfs_layout_hdr *lo, struct pnfs_layout_range *range); /* test for nfs page cache coalescing */ const struct nfs_pageio_ops *pg_read_ops; const struct nfs_pageio_ops *pg_write_ops; struct pnfs_ds_commit_info *(*get_ds_info) (struct inode *inode); void (*mark_request_commit) (struct nfs_page *req, struct pnfs_layout_segment *lseg, struct nfs_commit_info *cinfo, u32 ds_commit_idx); void (*clear_request_commit) (struct nfs_page *req, struct nfs_commit_info *cinfo); int (*scan_commit_lists) (struct nfs_commit_info *cinfo, int max); void (*recover_commit_reqs) (struct list_head *list, struct nfs_commit_info *cinfo); struct nfs_page * (*search_commit_reqs)(struct nfs_commit_info *cinfo, struct page *page); int (*commit_pagelist)(struct inode *inode, struct list_head *mds_pages, int how, struct nfs_commit_info *cinfo); int (*sync)(struct inode *inode, bool datasync); /* * Return PNFS_ATTEMPTED to indicate the layout code has attempted * I/O, else return PNFS_NOT_ATTEMPTED to fall back to normal NFS */ enum pnfs_try_status (*read_pagelist)(struct nfs_pgio_header *); enum pnfs_try_status (*write_pagelist)(struct nfs_pgio_header *, int); void (*free_deviceid_node) (struct nfs4_deviceid_node *); struct nfs4_deviceid_node * (*alloc_deviceid_node) (struct nfs_server *server, struct pnfs_device *pdev, gfp_t gfp_flags); void (*encode_layoutreturn) (struct pnfs_layout_hdr *layoutid, struct xdr_stream *xdr, const struct nfs4_layoutreturn_args *args); void (*cleanup_layoutcommit) (struct nfs4_layoutcommit_data *data); int (*prepare_layoutcommit) (struct nfs4_layoutcommit_args *args); void (*encode_layoutcommit) (struct pnfs_layout_hdr *lo, struct xdr_stream *xdr, const struct nfs4_layoutcommit_args *args); int (*prepare_layoutstats) (struct nfs42_layoutstat_args *args); void (*cleanup_layoutstats) (struct nfs42_layoutstat_data *data); }; struct pnfs_layout_hdr { atomic_t plh_refcount; atomic_t plh_outstanding; /* number of RPCs out */ struct list_head plh_layouts; /* other client layouts */ struct list_head plh_bulk_destroy; struct list_head plh_segs; /* layout segments list */ unsigned long plh_block_lgets; /* block LAYOUTGET if >0 */ unsigned long plh_retry_timestamp; unsigned long plh_flags; nfs4_stateid plh_stateid; u32 plh_barrier; /* ignore lower seqids */ u32 plh_return_seq; enum pnfs_iomode plh_return_iomode; loff_t plh_lwb; /* last write byte for layoutcommit */ struct rpc_cred *plh_lc_cred; /* layoutcommit cred */ struct inode *plh_inode; }; struct pnfs_device { struct nfs4_deviceid dev_id; unsigned int layout_type; unsigned int mincount; unsigned int maxcount; /* gdia_maxcount */ struct page **pages; unsigned int pgbase; unsigned int pglen; /* reply buffer length */ unsigned char nocache : 1;/* May not be cached */ }; #define NFS4_PNFS_GETDEVLIST_MAXNUM 16 struct pnfs_devicelist { unsigned int eof; unsigned int num_devs; struct nfs4_deviceid dev_id[NFS4_PNFS_GETDEVLIST_MAXNUM]; }; extern int pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *); extern void pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *); /* nfs4proc.c */ extern int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *dev, struct rpc_cred *cred); extern struct pnfs_layout_segment* nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout, gfp_t gfp_flags); extern int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync); /* pnfs.c */ void pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo); void pnfs_put_lseg(struct pnfs_layout_segment *lseg); void pnfs_put_lseg_locked(struct pnfs_layout_segment *lseg); void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, u32); void unset_pnfs_layoutdriver(struct nfs_server *); void pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *, struct nfs_page *); int pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc); void pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio, struct nfs_page *req, u64 wb_size); void pnfs_generic_pg_cleanup(struct nfs_pageio_descriptor *); int pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc); size_t pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev, struct nfs_page *req); void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg); struct pnfs_layout_segment *pnfs_layout_process(struct nfs4_layoutget *lgp); void pnfs_free_lseg_list(struct list_head *tmp_list); void pnfs_destroy_layout(struct nfs_inode *); void pnfs_destroy_all_layouts(struct nfs_client *); int pnfs_destroy_layouts_byfsid(struct nfs_client *clp, struct nfs_fsid *fsid, bool is_recall); int pnfs_destroy_layouts_byclid(struct nfs_client *clp, bool is_recall); void pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo); void pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, const nfs4_stateid *new, bool update_barrier); int pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, struct list_head *tmp_list, const struct pnfs_layout_range *recall_range, u32 seq); int pnfs_mark_matching_lsegs_return(struct pnfs_layout_hdr *lo, struct list_head *tmp_list, const struct pnfs_layout_range *recall_range, u32 seq); bool pnfs_roc(struct inode *ino); void pnfs_roc_release(struct inode *ino); void pnfs_roc_set_barrier(struct inode *ino, u32 barrier); void pnfs_roc_get_barrier(struct inode *ino, u32 *barrier); bool pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task); void pnfs_set_layoutcommit(struct inode *, struct pnfs_layout_segment *, loff_t); void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data); int pnfs_layoutcommit_inode(struct inode *inode, bool sync); int pnfs_generic_sync(struct inode *inode, bool datasync); int pnfs_nfs_generic_sync(struct inode *inode, bool datasync); int _pnfs_return_layout(struct inode *); int pnfs_commit_and_return_layout(struct inode *); void pnfs_ld_write_done(struct nfs_pgio_header *); void pnfs_ld_read_done(struct nfs_pgio_header *); void pnfs_read_resend_pnfs(struct nfs_pgio_header *); struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino, struct nfs_open_context *ctx, loff_t pos, u64 count, enum pnfs_iomode iomode, bool strict_iomode, gfp_t gfp_flags); void pnfs_clear_layoutreturn_waitbit(struct pnfs_layout_hdr *lo); void pnfs_generic_layout_insert_lseg(struct pnfs_layout_hdr *lo, struct pnfs_layout_segment *lseg, bool (*is_after)(const struct pnfs_layout_range *lseg_range, const struct pnfs_layout_range *old), bool (*do_merge)(struct pnfs_layout_segment *lseg, struct pnfs_layout_segment *old), struct list_head *free_me); void nfs4_deviceid_mark_client_invalid(struct nfs_client *clp); int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *); int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *); struct nfs4_threshold *pnfs_mdsthreshold_alloc(void); void pnfs_error_mark_layout_for_return(struct inode *inode, struct pnfs_layout_segment *lseg); /* nfs4_deviceid_flags */ enum { NFS_DEVICEID_INVALID = 0, /* set when MDS clientid recalled */ NFS_DEVICEID_UNAVAILABLE, /* device temporarily unavailable */ NFS_DEVICEID_NOCACHE, /* device may not be cached */ }; /* pnfs_dev.c */ struct nfs4_deviceid_node { struct hlist_node node; struct hlist_node tmpnode; const struct pnfs_layoutdriver_type *ld; const struct nfs_client *nfs_client; unsigned long flags; unsigned long timestamp_unavailable; struct nfs4_deviceid deviceid; struct rcu_head rcu; atomic_t ref; }; struct nfs4_deviceid_node * nfs4_find_get_deviceid(struct nfs_server *server, const struct nfs4_deviceid *id, struct rpc_cred *cred, gfp_t gfp_mask); void nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *); void nfs4_init_deviceid_node(struct nfs4_deviceid_node *, struct nfs_server *, const struct nfs4_deviceid *); bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *); void nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node); bool nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node); void nfs4_deviceid_purge_client(const struct nfs_client *); /* pnfs_nfs.c */ void pnfs_generic_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo); void pnfs_generic_commit_release(void *calldata); void pnfs_generic_prepare_to_resend_writes(struct nfs_commit_data *data); void pnfs_generic_rw_release(void *data); void pnfs_generic_recover_commit_reqs(struct list_head *dst, struct nfs_commit_info *cinfo); int pnfs_generic_commit_pagelist(struct inode *inode, struct list_head *mds_pages, int how, struct nfs_commit_info *cinfo, int (*initiate_commit)(struct nfs_commit_data *data, int how)); int pnfs_generic_scan_commit_lists(struct nfs_commit_info *cinfo, int max); void pnfs_generic_write_commit_done(struct rpc_task *task, void *data); void nfs4_pnfs_ds_put(struct nfs4_pnfs_ds *ds); struct nfs4_pnfs_ds *nfs4_pnfs_ds_add(struct list_head *dsaddrs, gfp_t gfp_flags); void nfs4_pnfs_v3_ds_connect_unload(void); void nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds, struct nfs4_deviceid_node *devid, unsigned int timeo, unsigned int retrans, u32 version, u32 minor_version, rpc_authflavor_t au_flavor); struct nfs4_pnfs_ds_addr *nfs4_decode_mp_ds_addr(struct net *net, struct xdr_stream *xdr, gfp_t gfp_flags); void pnfs_layout_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, struct nfs_commit_info *cinfo, u32 ds_commit_idx); static inline bool nfs_have_layout(struct inode *inode) { return NFS_I(inode)->layout != NULL; } static inline struct nfs4_deviceid_node * nfs4_get_deviceid(struct nfs4_deviceid_node *d) { atomic_inc(&d->ref); return d; } static inline struct pnfs_layout_segment * pnfs_get_lseg(struct pnfs_layout_segment *lseg) { if (lseg) { atomic_inc(&lseg->pls_refcount); smp_mb__after_atomic(); } return lseg; } static inline bool pnfs_is_valid_lseg(struct pnfs_layout_segment *lseg) { return test_bit(NFS_LSEG_VALID, &lseg->pls_flags) != 0; } /* Return true if a layout driver is being used for this mountpoint */ static inline int pnfs_enabled_sb(struct nfs_server *nfss) { return nfss->pnfs_curr_ld != NULL; } static inline int pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, struct nfs_commit_info *cinfo) { if (cinfo->ds == NULL || cinfo->ds->ncommitting == 0) return PNFS_NOT_ATTEMPTED; return NFS_SERVER(inode)->pnfs_curr_ld->commit_pagelist(inode, mds_pages, how, cinfo); } static inline struct pnfs_ds_commit_info * pnfs_get_ds_info(struct inode *inode) { struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; if (ld == NULL || ld->get_ds_info == NULL) return NULL; return ld->get_ds_info(inode); } static inline void pnfs_generic_mark_devid_invalid(struct nfs4_deviceid_node *node) { set_bit(NFS_DEVICEID_INVALID, &node->flags); } static inline bool pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, struct nfs_commit_info *cinfo, u32 ds_commit_idx) { struct inode *inode = d_inode(req->wb_context->dentry); struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; if (lseg == NULL || ld->mark_request_commit == NULL) return false; ld->mark_request_commit(req, lseg, cinfo, ds_commit_idx); return true; } static inline bool pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) { struct inode *inode = d_inode(req->wb_context->dentry); struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; if (ld == NULL || ld->clear_request_commit == NULL) return false; ld->clear_request_commit(req, cinfo); return true; } static inline int pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, int max) { if (cinfo->ds == NULL || cinfo->ds->nwritten == 0) return 0; else return NFS_SERVER(inode)->pnfs_curr_ld->scan_commit_lists(cinfo, max); } static inline struct nfs_page * pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo, struct page *page) { struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; if (ld == NULL || ld->search_commit_reqs == NULL) return NULL; return ld->search_commit_reqs(cinfo, page); } /* Should the pNFS client commit and return the layout upon a setattr */ static inline bool pnfs_ld_layoutret_on_setattr(struct inode *inode) { if (!pnfs_enabled_sb(NFS_SERVER(inode))) return false; return NFS_SERVER(inode)->pnfs_curr_ld->flags & PNFS_LAYOUTRET_ON_SETATTR; } static inline bool pnfs_ld_read_whole_page(struct inode *inode) { if (!pnfs_enabled_sb(NFS_SERVER(inode))) return false; return NFS_SERVER(inode)->pnfs_curr_ld->flags & PNFS_READ_WHOLE_PAGE; } static inline int pnfs_sync_inode(struct inode *inode, bool datasync) { if (!pnfs_enabled_sb(NFS_SERVER(inode))) return 0; return NFS_SERVER(inode)->pnfs_curr_ld->sync(inode, datasync); } static inline bool pnfs_layoutcommit_outstanding(struct inode *inode) { struct nfs_inode *nfsi = NFS_I(inode); return test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags) != 0 || test_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags) != 0; } static inline int pnfs_return_layout(struct inode *ino) { struct nfs_inode *nfsi = NFS_I(ino); struct nfs_server *nfss = NFS_SERVER(ino); if (pnfs_enabled_sb(nfss) && nfsi->layout) return _pnfs_return_layout(ino); return 0; } static inline bool pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, struct nfs_server *nfss) { return (dst && src && src->bm != 0 && nfss->pnfs_curr_ld && nfss->pnfs_curr_ld->id == src->l_type); } static inline u64 pnfs_calc_offset_end(u64 offset, u64 len) { if (len == NFS4_MAX_UINT64 || len >= NFS4_MAX_UINT64 - offset) return NFS4_MAX_UINT64; return offset + len - 1; } static inline u64 pnfs_calc_offset_length(u64 offset, u64 end) { if (end == NFS4_MAX_UINT64 || end <= offset) return NFS4_MAX_UINT64; return 1 + end - offset; } /** * pnfs_mark_layout_returned_if_empty - marks the layout as returned * @lo: layout header * * Note: Caller must hold inode->i_lock */ static inline void pnfs_mark_layout_returned_if_empty(struct pnfs_layout_hdr *lo) { if (list_empty(&lo->plh_segs)) set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags); } static inline void pnfs_copy_range(struct pnfs_layout_range *dst, const struct pnfs_layout_range *src) { memcpy(dst, src, sizeof(*dst)); } extern unsigned int layoutstats_timer; #ifdef NFS_DEBUG void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id); #else static inline void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id) { } #endif /* NFS_DEBUG */ #else /* CONFIG_NFS_V4_1 */ static inline bool nfs_have_layout(struct inode *inode) { return false; } static inline void pnfs_destroy_all_layouts(struct nfs_client *clp) { } static inline void pnfs_destroy_layout(struct nfs_inode *nfsi) { } static inline struct pnfs_layout_segment * pnfs_get_lseg(struct pnfs_layout_segment *lseg) { return NULL; } static inline void pnfs_put_lseg(struct pnfs_layout_segment *lseg) { } static inline int pnfs_return_layout(struct inode *ino) { return 0; } static inline int pnfs_commit_and_return_layout(struct inode *inode) { return 0; } static inline bool pnfs_ld_layoutret_on_setattr(struct inode *inode) { return false; } static inline bool pnfs_ld_read_whole_page(struct inode *inode) { return false; } static inline int pnfs_sync_inode(struct inode *inode, bool datasync) { return 0; } static inline bool pnfs_roc(struct inode *ino) { return false; } static inline void pnfs_roc_release(struct inode *ino) { } static inline void pnfs_roc_set_barrier(struct inode *ino, u32 barrier) { } static inline void pnfs_roc_get_barrier(struct inode *ino, u32 *barrier) { } static inline bool pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task) { return false; } static inline void set_pnfs_layoutdriver(struct nfs_server *s, const struct nfs_fh *mntfh, u32 id) { } static inline void unset_pnfs_layoutdriver(struct nfs_server *s) { } static inline int pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, struct nfs_commit_info *cinfo) { return PNFS_NOT_ATTEMPTED; } static inline struct pnfs_ds_commit_info * pnfs_get_ds_info(struct inode *inode) { return NULL; } static inline bool pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, struct nfs_commit_info *cinfo, u32 ds_commit_idx) { return false; } static inline bool pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) { return false; } static inline int pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, int max) { return 0; } static inline struct nfs_page * pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo, struct page *page) { return NULL; } static inline int pnfs_layoutcommit_inode(struct inode *inode, bool sync) { return 0; } static inline bool pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, struct nfs_server *nfss) { return false; } static inline bool pnfs_layoutcommit_outstanding(struct inode *inode) { return false; } static inline struct nfs4_threshold *pnfs_mdsthreshold_alloc(void) { return NULL; } static inline void nfs4_pnfs_v3_ds_connect_unload(void) { } #endif /* CONFIG_NFS_V4_1 */ #if IS_ENABLED(CONFIG_NFS_V4_2) int pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags); #else static inline int pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags) { return 0; } #endif #endif /* FS_NFS_PNFS_H */