| 1 | /* |
| 2 | * pNFS client data structures. |
| 3 | * |
| 4 | * Copyright (c) 2002 |
| 5 | * The Regents of the University of Michigan |
| 6 | * All Rights Reserved |
| 7 | * |
| 8 | * Dean Hildebrand <dhildebz@umich.edu> |
| 9 | * |
| 10 | * Permission is granted to use, copy, create derivative works, and |
| 11 | * redistribute this software and such derivative works for any purpose, |
| 12 | * so long as the name of the University of Michigan is not used in |
| 13 | * any advertising or publicity pertaining to the use or distribution |
| 14 | * of this software without specific, written prior authorization. If |
| 15 | * the above copyright notice or any other identification of the |
| 16 | * University of Michigan is included in any copy of any portion of |
| 17 | * this software, then the disclaimer below must also be included. |
| 18 | * |
| 19 | * This software is provided as is, without representation or warranty |
| 20 | * of any kind either express or implied, including without limitation |
| 21 | * the implied warranties of merchantability, fitness for a particular |
| 22 | * purpose, or noninfringement. The Regents of the University of |
| 23 | * Michigan shall not be liable for any damages, including special, |
| 24 | * indirect, incidental, or consequential damages, with respect to any |
| 25 | * claim arising out of or in connection with the use of the software, |
| 26 | * even if it has been or is hereafter advised of the possibility of |
| 27 | * such damages. |
| 28 | */ |
| 29 | |
| 30 | #ifndef FS_NFS_PNFS_H |
| 31 | #define FS_NFS_PNFS_H |
| 32 | |
| 33 | #include <linux/nfs_fs.h> |
| 34 | #include <linux/nfs_page.h> |
| 35 | #include <linux/workqueue.h> |
| 36 | |
| 37 | enum { |
| 38 | NFS_LSEG_VALID = 0, /* cleared when lseg is recalled/returned */ |
| 39 | NFS_LSEG_ROC, /* roc bit received from server */ |
| 40 | NFS_LSEG_LAYOUTCOMMIT, /* layoutcommit bit set for layoutcommit */ |
| 41 | }; |
| 42 | |
| 43 | struct pnfs_layout_segment { |
| 44 | struct list_head pls_list; |
| 45 | struct list_head pls_lc_list; |
| 46 | struct pnfs_layout_range pls_range; |
| 47 | atomic_t pls_refcount; |
| 48 | unsigned long pls_flags; |
| 49 | struct pnfs_layout_hdr *pls_layout; |
| 50 | struct work_struct pls_work; |
| 51 | }; |
| 52 | |
| 53 | enum pnfs_try_status { |
| 54 | PNFS_ATTEMPTED = 0, |
| 55 | PNFS_NOT_ATTEMPTED = 1, |
| 56 | }; |
| 57 | |
| 58 | #ifdef CONFIG_NFS_V4_1 |
| 59 | |
| 60 | #define LAYOUT_NFSV4_1_MODULE_PREFIX "nfs-layouttype4" |
| 61 | |
| 62 | enum { |
| 63 | NFS_LAYOUT_RO_FAILED = 0, /* get ro layout failed stop trying */ |
| 64 | NFS_LAYOUT_RW_FAILED, /* get rw layout failed stop trying */ |
| 65 | NFS_LAYOUT_BULK_RECALL, /* bulk recall affecting layout */ |
| 66 | NFS_LAYOUT_ROC, /* some lseg had roc bit set */ |
| 67 | NFS_LAYOUT_RETURN, /* Return this layout ASAP */ |
| 68 | NFS_LAYOUT_INVALID_STID, /* layout stateid id is invalid */ |
| 69 | }; |
| 70 | |
| 71 | enum layoutdriver_policy_flags { |
| 72 | /* Should the pNFS client commit and return the layout upon a setattr */ |
| 73 | PNFS_LAYOUTRET_ON_SETATTR = 1 << 0, |
| 74 | PNFS_LAYOUTRET_ON_ERROR = 1 << 1, |
| 75 | PNFS_READ_WHOLE_PAGE = 1 << 2, |
| 76 | }; |
| 77 | |
| 78 | struct nfs4_deviceid_node; |
| 79 | |
| 80 | /* Per-layout driver specific registration structure */ |
| 81 | struct pnfs_layoutdriver_type { |
| 82 | struct list_head pnfs_tblid; |
| 83 | const u32 id; |
| 84 | const char *name; |
| 85 | struct module *owner; |
| 86 | unsigned flags; |
| 87 | |
| 88 | int (*set_layoutdriver) (struct nfs_server *, const struct nfs_fh *); |
| 89 | int (*clear_layoutdriver) (struct nfs_server *); |
| 90 | |
| 91 | struct pnfs_layout_hdr * (*alloc_layout_hdr) (struct inode *inode, gfp_t gfp_flags); |
| 92 | void (*free_layout_hdr) (struct pnfs_layout_hdr *); |
| 93 | |
| 94 | struct pnfs_layout_segment * (*alloc_lseg) (struct pnfs_layout_hdr *layoutid, struct nfs4_layoutget_res *lgr, gfp_t gfp_flags); |
| 95 | void (*free_lseg) (struct pnfs_layout_segment *lseg); |
| 96 | |
| 97 | /* test for nfs page cache coalescing */ |
| 98 | const struct nfs_pageio_ops *pg_read_ops; |
| 99 | const struct nfs_pageio_ops *pg_write_ops; |
| 100 | |
| 101 | struct pnfs_ds_commit_info *(*get_ds_info) (struct inode *inode); |
| 102 | void (*mark_request_commit) (struct nfs_page *req, |
| 103 | struct pnfs_layout_segment *lseg, |
| 104 | struct nfs_commit_info *cinfo); |
| 105 | void (*clear_request_commit) (struct nfs_page *req, |
| 106 | struct nfs_commit_info *cinfo); |
| 107 | int (*scan_commit_lists) (struct nfs_commit_info *cinfo, |
| 108 | int max); |
| 109 | void (*recover_commit_reqs) (struct list_head *list, |
| 110 | struct nfs_commit_info *cinfo); |
| 111 | struct nfs_page * (*search_commit_reqs)(struct nfs_commit_info *cinfo, |
| 112 | struct page *page); |
| 113 | int (*commit_pagelist)(struct inode *inode, |
| 114 | struct list_head *mds_pages, |
| 115 | int how, |
| 116 | struct nfs_commit_info *cinfo); |
| 117 | |
| 118 | /* |
| 119 | * Return PNFS_ATTEMPTED to indicate the layout code has attempted |
| 120 | * I/O, else return PNFS_NOT_ATTEMPTED to fall back to normal NFS |
| 121 | */ |
| 122 | enum pnfs_try_status (*read_pagelist)(struct nfs_pgio_header *); |
| 123 | enum pnfs_try_status (*write_pagelist)(struct nfs_pgio_header *, int); |
| 124 | |
| 125 | void (*free_deviceid_node) (struct nfs4_deviceid_node *); |
| 126 | |
| 127 | void (*encode_layoutreturn) (struct pnfs_layout_hdr *layoutid, |
| 128 | struct xdr_stream *xdr, |
| 129 | const struct nfs4_layoutreturn_args *args); |
| 130 | |
| 131 | void (*cleanup_layoutcommit) (struct nfs4_layoutcommit_data *data); |
| 132 | int (*prepare_layoutcommit) (struct nfs4_layoutcommit_args *args); |
| 133 | void (*encode_layoutcommit) (struct pnfs_layout_hdr *lo, |
| 134 | struct xdr_stream *xdr, |
| 135 | const struct nfs4_layoutcommit_args *args); |
| 136 | }; |
| 137 | |
| 138 | struct pnfs_layout_hdr { |
| 139 | atomic_t plh_refcount; |
| 140 | struct list_head plh_layouts; /* other client layouts */ |
| 141 | struct list_head plh_bulk_destroy; |
| 142 | struct list_head plh_segs; /* layout segments list */ |
| 143 | nfs4_stateid plh_stateid; |
| 144 | atomic_t plh_outstanding; /* number of RPCs out */ |
| 145 | unsigned long plh_block_lgets; /* block LAYOUTGET if >0 */ |
| 146 | u32 plh_barrier; /* ignore lower seqids */ |
| 147 | unsigned long plh_retry_timestamp; |
| 148 | unsigned long plh_flags; |
| 149 | loff_t plh_lwb; /* last write byte for layoutcommit */ |
| 150 | struct rpc_cred *plh_lc_cred; /* layoutcommit cred */ |
| 151 | struct inode *plh_inode; |
| 152 | }; |
| 153 | |
| 154 | struct pnfs_device { |
| 155 | struct nfs4_deviceid dev_id; |
| 156 | unsigned int layout_type; |
| 157 | unsigned int mincount; |
| 158 | unsigned int maxcount; /* gdia_maxcount */ |
| 159 | struct page **pages; |
| 160 | unsigned int pgbase; |
| 161 | unsigned int pglen; /* reply buffer length */ |
| 162 | }; |
| 163 | |
| 164 | #define NFS4_PNFS_GETDEVLIST_MAXNUM 16 |
| 165 | |
| 166 | struct pnfs_devicelist { |
| 167 | unsigned int eof; |
| 168 | unsigned int num_devs; |
| 169 | struct nfs4_deviceid dev_id[NFS4_PNFS_GETDEVLIST_MAXNUM]; |
| 170 | }; |
| 171 | |
| 172 | extern int pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *); |
| 173 | extern void pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *); |
| 174 | |
| 175 | /* nfs4proc.c */ |
| 176 | extern int nfs4_proc_getdevicelist(struct nfs_server *server, |
| 177 | const struct nfs_fh *fh, |
| 178 | struct pnfs_devicelist *devlist); |
| 179 | extern int nfs4_proc_getdeviceinfo(struct nfs_server *server, |
| 180 | struct pnfs_device *dev, |
| 181 | struct rpc_cred *cred); |
| 182 | extern struct pnfs_layout_segment* nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags); |
| 183 | extern int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp); |
| 184 | |
| 185 | /* pnfs.c */ |
| 186 | void pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo); |
| 187 | void pnfs_put_lseg(struct pnfs_layout_segment *lseg); |
| 188 | void pnfs_put_lseg_async(struct pnfs_layout_segment *lseg); |
| 189 | |
| 190 | void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, u32); |
| 191 | void unset_pnfs_layoutdriver(struct nfs_server *); |
| 192 | void pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *, struct nfs_page *); |
| 193 | int pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc); |
| 194 | void pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio, |
| 195 | struct nfs_page *req, u64 wb_size); |
| 196 | int pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc); |
| 197 | size_t pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, |
| 198 | struct nfs_page *prev, struct nfs_page *req); |
| 199 | void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg); |
| 200 | struct pnfs_layout_segment *pnfs_layout_process(struct nfs4_layoutget *lgp); |
| 201 | void pnfs_free_lseg_list(struct list_head *tmp_list); |
| 202 | void pnfs_destroy_layout(struct nfs_inode *); |
| 203 | void pnfs_destroy_all_layouts(struct nfs_client *); |
| 204 | int pnfs_destroy_layouts_byfsid(struct nfs_client *clp, |
| 205 | struct nfs_fsid *fsid, |
| 206 | bool is_recall); |
| 207 | int pnfs_destroy_layouts_byclid(struct nfs_client *clp, |
| 208 | bool is_recall); |
| 209 | void pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo); |
| 210 | void pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, |
| 211 | const nfs4_stateid *new, |
| 212 | bool update_barrier); |
| 213 | int pnfs_choose_layoutget_stateid(nfs4_stateid *dst, |
| 214 | struct pnfs_layout_hdr *lo, |
| 215 | struct nfs4_state *open_state); |
| 216 | int pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, |
| 217 | struct list_head *tmp_list, |
| 218 | struct pnfs_layout_range *recall_range); |
| 219 | bool pnfs_roc(struct inode *ino); |
| 220 | void pnfs_roc_release(struct inode *ino); |
| 221 | void pnfs_roc_set_barrier(struct inode *ino, u32 barrier); |
| 222 | bool pnfs_roc_drain(struct inode *ino, u32 *barrier, struct rpc_task *task); |
| 223 | void pnfs_set_layoutcommit(struct nfs_pgio_header *); |
| 224 | void pnfs_commit_set_layoutcommit(struct nfs_commit_data *data); |
| 225 | void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data); |
| 226 | int pnfs_layoutcommit_inode(struct inode *inode, bool sync); |
| 227 | int _pnfs_return_layout(struct inode *); |
| 228 | int pnfs_commit_and_return_layout(struct inode *); |
| 229 | void pnfs_ld_write_done(struct nfs_pgio_header *); |
| 230 | void pnfs_ld_read_done(struct nfs_pgio_header *); |
| 231 | struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino, |
| 232 | struct nfs_open_context *ctx, |
| 233 | loff_t pos, |
| 234 | u64 count, |
| 235 | enum pnfs_iomode iomode, |
| 236 | gfp_t gfp_flags); |
| 237 | |
| 238 | void nfs4_deviceid_mark_client_invalid(struct nfs_client *clp); |
| 239 | int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *); |
| 240 | int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *); |
| 241 | struct nfs4_threshold *pnfs_mdsthreshold_alloc(void); |
| 242 | |
| 243 | /* nfs4_deviceid_flags */ |
| 244 | enum { |
| 245 | NFS_DEVICEID_INVALID = 0, /* set when MDS clientid recalled */ |
| 246 | NFS_DEVICEID_UNAVAILABLE, /* device temporarily unavailable */ |
| 247 | }; |
| 248 | |
| 249 | /* pnfs_dev.c */ |
| 250 | struct nfs4_deviceid_node { |
| 251 | struct hlist_node node; |
| 252 | struct hlist_node tmpnode; |
| 253 | const struct pnfs_layoutdriver_type *ld; |
| 254 | const struct nfs_client *nfs_client; |
| 255 | unsigned long flags; |
| 256 | unsigned long timestamp_unavailable; |
| 257 | struct nfs4_deviceid deviceid; |
| 258 | atomic_t ref; |
| 259 | }; |
| 260 | |
| 261 | struct nfs4_deviceid_node *nfs4_find_get_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *); |
| 262 | void nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *); |
| 263 | void nfs4_init_deviceid_node(struct nfs4_deviceid_node *, |
| 264 | const struct pnfs_layoutdriver_type *, |
| 265 | const struct nfs_client *, |
| 266 | const struct nfs4_deviceid *); |
| 267 | struct nfs4_deviceid_node *nfs4_insert_deviceid_node(struct nfs4_deviceid_node *); |
| 268 | bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *); |
| 269 | void nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node); |
| 270 | bool nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node); |
| 271 | void nfs4_deviceid_purge_client(const struct nfs_client *); |
| 272 | |
| 273 | static inline struct pnfs_layout_segment * |
| 274 | pnfs_get_lseg(struct pnfs_layout_segment *lseg) |
| 275 | { |
| 276 | if (lseg) { |
| 277 | atomic_inc(&lseg->pls_refcount); |
| 278 | smp_mb__after_atomic(); |
| 279 | } |
| 280 | return lseg; |
| 281 | } |
| 282 | |
| 283 | /* Return true if a layout driver is being used for this mountpoint */ |
| 284 | static inline int pnfs_enabled_sb(struct nfs_server *nfss) |
| 285 | { |
| 286 | return nfss->pnfs_curr_ld != NULL; |
| 287 | } |
| 288 | |
| 289 | static inline int |
| 290 | pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, |
| 291 | struct nfs_commit_info *cinfo) |
| 292 | { |
| 293 | if (cinfo->ds == NULL || cinfo->ds->ncommitting == 0) |
| 294 | return PNFS_NOT_ATTEMPTED; |
| 295 | return NFS_SERVER(inode)->pnfs_curr_ld->commit_pagelist(inode, mds_pages, how, cinfo); |
| 296 | } |
| 297 | |
| 298 | static inline struct pnfs_ds_commit_info * |
| 299 | pnfs_get_ds_info(struct inode *inode) |
| 300 | { |
| 301 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; |
| 302 | |
| 303 | if (ld == NULL || ld->get_ds_info == NULL) |
| 304 | return NULL; |
| 305 | return ld->get_ds_info(inode); |
| 306 | } |
| 307 | |
| 308 | static inline bool |
| 309 | pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, |
| 310 | struct nfs_commit_info *cinfo) |
| 311 | { |
| 312 | struct inode *inode = req->wb_context->dentry->d_inode; |
| 313 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; |
| 314 | |
| 315 | if (lseg == NULL || ld->mark_request_commit == NULL) |
| 316 | return false; |
| 317 | ld->mark_request_commit(req, lseg, cinfo); |
| 318 | return true; |
| 319 | } |
| 320 | |
| 321 | static inline bool |
| 322 | pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) |
| 323 | { |
| 324 | struct inode *inode = req->wb_context->dentry->d_inode; |
| 325 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; |
| 326 | |
| 327 | if (ld == NULL || ld->clear_request_commit == NULL) |
| 328 | return false; |
| 329 | ld->clear_request_commit(req, cinfo); |
| 330 | return true; |
| 331 | } |
| 332 | |
| 333 | static inline int |
| 334 | pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, |
| 335 | int max) |
| 336 | { |
| 337 | if (cinfo->ds == NULL || cinfo->ds->nwritten == 0) |
| 338 | return 0; |
| 339 | else |
| 340 | return NFS_SERVER(inode)->pnfs_curr_ld->scan_commit_lists(cinfo, max); |
| 341 | } |
| 342 | |
| 343 | static inline void |
| 344 | pnfs_recover_commit_reqs(struct inode *inode, struct list_head *list, |
| 345 | struct nfs_commit_info *cinfo) |
| 346 | { |
| 347 | if (cinfo->ds == NULL || cinfo->ds->nwritten == 0) |
| 348 | return; |
| 349 | NFS_SERVER(inode)->pnfs_curr_ld->recover_commit_reqs(list, cinfo); |
| 350 | } |
| 351 | |
| 352 | static inline struct nfs_page * |
| 353 | pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo, |
| 354 | struct page *page) |
| 355 | { |
| 356 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; |
| 357 | |
| 358 | if (ld == NULL || ld->search_commit_reqs == NULL) |
| 359 | return NULL; |
| 360 | return ld->search_commit_reqs(cinfo, page); |
| 361 | } |
| 362 | |
| 363 | /* Should the pNFS client commit and return the layout upon a setattr */ |
| 364 | static inline bool |
| 365 | pnfs_ld_layoutret_on_setattr(struct inode *inode) |
| 366 | { |
| 367 | if (!pnfs_enabled_sb(NFS_SERVER(inode))) |
| 368 | return false; |
| 369 | return NFS_SERVER(inode)->pnfs_curr_ld->flags & |
| 370 | PNFS_LAYOUTRET_ON_SETATTR; |
| 371 | } |
| 372 | |
| 373 | static inline bool |
| 374 | pnfs_ld_read_whole_page(struct inode *inode) |
| 375 | { |
| 376 | if (!pnfs_enabled_sb(NFS_SERVER(inode))) |
| 377 | return false; |
| 378 | return NFS_SERVER(inode)->pnfs_curr_ld->flags & PNFS_READ_WHOLE_PAGE; |
| 379 | } |
| 380 | |
| 381 | static inline bool |
| 382 | pnfs_layoutcommit_outstanding(struct inode *inode) |
| 383 | { |
| 384 | struct nfs_inode *nfsi = NFS_I(inode); |
| 385 | |
| 386 | return test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags) != 0 || |
| 387 | test_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags) != 0; |
| 388 | } |
| 389 | |
| 390 | static inline int pnfs_return_layout(struct inode *ino) |
| 391 | { |
| 392 | struct nfs_inode *nfsi = NFS_I(ino); |
| 393 | struct nfs_server *nfss = NFS_SERVER(ino); |
| 394 | |
| 395 | if (pnfs_enabled_sb(nfss) && nfsi->layout) |
| 396 | return _pnfs_return_layout(ino); |
| 397 | |
| 398 | return 0; |
| 399 | } |
| 400 | |
| 401 | static inline bool |
| 402 | pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, |
| 403 | struct nfs_server *nfss) |
| 404 | { |
| 405 | return (dst && src && src->bm != 0 && nfss->pnfs_curr_ld && |
| 406 | nfss->pnfs_curr_ld->id == src->l_type); |
| 407 | } |
| 408 | |
| 409 | #ifdef NFS_DEBUG |
| 410 | void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id); |
| 411 | #else |
| 412 | static inline void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id) |
| 413 | { |
| 414 | } |
| 415 | #endif /* NFS_DEBUG */ |
| 416 | #else /* CONFIG_NFS_V4_1 */ |
| 417 | |
| 418 | static inline void pnfs_destroy_all_layouts(struct nfs_client *clp) |
| 419 | { |
| 420 | } |
| 421 | |
| 422 | static inline void pnfs_destroy_layout(struct nfs_inode *nfsi) |
| 423 | { |
| 424 | } |
| 425 | |
| 426 | static inline struct pnfs_layout_segment * |
| 427 | pnfs_get_lseg(struct pnfs_layout_segment *lseg) |
| 428 | { |
| 429 | return NULL; |
| 430 | } |
| 431 | |
| 432 | static inline void pnfs_put_lseg(struct pnfs_layout_segment *lseg) |
| 433 | { |
| 434 | } |
| 435 | |
| 436 | static inline void pnfs_put_lseg_async(struct pnfs_layout_segment *lseg) |
| 437 | { |
| 438 | } |
| 439 | |
| 440 | static inline int pnfs_return_layout(struct inode *ino) |
| 441 | { |
| 442 | return 0; |
| 443 | } |
| 444 | |
| 445 | static inline int pnfs_commit_and_return_layout(struct inode *inode) |
| 446 | { |
| 447 | return 0; |
| 448 | } |
| 449 | |
| 450 | static inline bool |
| 451 | pnfs_ld_layoutret_on_setattr(struct inode *inode) |
| 452 | { |
| 453 | return false; |
| 454 | } |
| 455 | |
| 456 | static inline bool |
| 457 | pnfs_ld_read_whole_page(struct inode *inode) |
| 458 | { |
| 459 | return false; |
| 460 | } |
| 461 | |
| 462 | static inline bool |
| 463 | pnfs_roc(struct inode *ino) |
| 464 | { |
| 465 | return false; |
| 466 | } |
| 467 | |
| 468 | static inline void |
| 469 | pnfs_roc_release(struct inode *ino) |
| 470 | { |
| 471 | } |
| 472 | |
| 473 | static inline void |
| 474 | pnfs_roc_set_barrier(struct inode *ino, u32 barrier) |
| 475 | { |
| 476 | } |
| 477 | |
| 478 | static inline bool |
| 479 | pnfs_roc_drain(struct inode *ino, u32 *barrier, struct rpc_task *task) |
| 480 | { |
| 481 | return false; |
| 482 | } |
| 483 | |
| 484 | static inline void set_pnfs_layoutdriver(struct nfs_server *s, |
| 485 | const struct nfs_fh *mntfh, u32 id) |
| 486 | { |
| 487 | } |
| 488 | |
| 489 | static inline void unset_pnfs_layoutdriver(struct nfs_server *s) |
| 490 | { |
| 491 | } |
| 492 | |
| 493 | static inline int |
| 494 | pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, |
| 495 | struct nfs_commit_info *cinfo) |
| 496 | { |
| 497 | return PNFS_NOT_ATTEMPTED; |
| 498 | } |
| 499 | |
| 500 | static inline struct pnfs_ds_commit_info * |
| 501 | pnfs_get_ds_info(struct inode *inode) |
| 502 | { |
| 503 | return NULL; |
| 504 | } |
| 505 | |
| 506 | static inline bool |
| 507 | pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, |
| 508 | struct nfs_commit_info *cinfo) |
| 509 | { |
| 510 | return false; |
| 511 | } |
| 512 | |
| 513 | static inline bool |
| 514 | pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) |
| 515 | { |
| 516 | return false; |
| 517 | } |
| 518 | |
| 519 | static inline int |
| 520 | pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, |
| 521 | int max) |
| 522 | { |
| 523 | return 0; |
| 524 | } |
| 525 | |
| 526 | static inline void |
| 527 | pnfs_recover_commit_reqs(struct inode *inode, struct list_head *list, |
| 528 | struct nfs_commit_info *cinfo) |
| 529 | { |
| 530 | } |
| 531 | |
| 532 | static inline struct nfs_page * |
| 533 | pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo, |
| 534 | struct page *page) |
| 535 | { |
| 536 | return NULL; |
| 537 | } |
| 538 | |
| 539 | static inline int pnfs_layoutcommit_inode(struct inode *inode, bool sync) |
| 540 | { |
| 541 | return 0; |
| 542 | } |
| 543 | |
| 544 | static inline bool |
| 545 | pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, |
| 546 | struct nfs_server *nfss) |
| 547 | { |
| 548 | return false; |
| 549 | } |
| 550 | |
| 551 | static inline bool |
| 552 | pnfs_layoutcommit_outstanding(struct inode *inode) |
| 553 | { |
| 554 | return false; |
| 555 | } |
| 556 | |
| 557 | |
| 558 | static inline struct nfs4_threshold *pnfs_mdsthreshold_alloc(void) |
| 559 | { |
| 560 | return NULL; |
| 561 | } |
| 562 | |
| 563 | #endif /* CONFIG_NFS_V4_1 */ |
| 564 | |
| 565 | #endif /* FS_NFS_PNFS_H */ |