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Diffstat (limited to 'kernel/fs/nfs/pnfs.h')
| -rw-r--r-- | kernel/fs/nfs/pnfs.h | 692 |
1 files changed, 692 insertions, 0 deletions
diff --git a/kernel/fs/nfs/pnfs.h b/kernel/fs/nfs/pnfs.h new file mode 100644 index 000000000..1e6308f82 --- /dev/null +++ b/kernel/fs/nfs/pnfs.h @@ -0,0 +1,692 @@ +/* + * 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; + 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_ROC, /* some lseg had roc bit set */ + NFS_LAYOUT_RETURN, /* Return this layout ASAP */ + NFS_LAYOUT_RETURN_BEFORE_CLOSE, /* Return this layout before close */ + NFS_LAYOUT_INVALID_STID, /* layout stateid id is invalid */ + NFS_LAYOUT_FIRST_LAYOUTGET, /* Serialize first layoutget */ + NFS_LAYOUT_RETRY_LAYOUTGET, /* Retry 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 (*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); +}; + +struct pnfs_layout_hdr { + atomic_t plh_refcount; + struct list_head plh_layouts; /* other client layouts */ + struct list_head plh_bulk_destroy; + struct list_head plh_segs; /* layout segments list */ + nfs4_stateid plh_stateid; + atomic_t plh_outstanding; /* number of RPCs out */ + unsigned long plh_block_lgets; /* block LAYOUTGET if >0 */ + u32 plh_barrier; /* ignore lower seqids */ + unsigned long plh_retry_timestamp; + unsigned long plh_flags; + 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, 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_choose_layoutget_stateid(nfs4_stateid *dst, + struct pnfs_layout_hdr *lo, + struct pnfs_layout_range *range, + struct nfs4_state *open_state); +int pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, + struct list_head *tmp_list, + struct pnfs_layout_range *recall_range); +bool pnfs_roc(struct inode *ino); +void pnfs_roc_release(struct inode *ino); +void pnfs_roc_set_barrier(struct inode *ino, u32 barrier); +bool pnfs_roc_drain(struct inode *ino, u32 *barrier, 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 *); +int 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, + gfp_t gfp_flags); +void pnfs_clear_layoutreturn_waitbit(struct pnfs_layout_hdr *lo); + +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 void pnfs_set_retry_layoutget(struct pnfs_layout_hdr *lo) +{ + if (!test_and_set_bit(NFS_LAYOUT_RETRY_LAYOUTGET, &lo->plh_flags)) + atomic_inc(&lo->plh_refcount); +} + +static inline void pnfs_clear_retry_layoutget(struct pnfs_layout_hdr *lo) +{ + if (test_and_clear_bit(NFS_LAYOUT_RETRY_LAYOUTGET, &lo->plh_flags)) { + atomic_dec(&lo->plh_refcount); + /* wake up waiters for LAYOUTRETURN as that is not needed */ + wake_up_bit(&lo->plh_flags, NFS_LAYOUT_RETURN); + } +} + +static inline bool pnfs_should_retry_layoutget(struct pnfs_layout_hdr *lo) +{ + return test_bit(NFS_LAYOUT_RETRY_LAYOUTGET, &lo->plh_flags); +} + +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; +} + +/* 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); +} + +#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 bool +pnfs_roc_drain(struct inode *ino, u32 *barrier, 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 */ + +#endif /* FS_NFS_PNFS_H */ |