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/refcount.h> 34 #include <linux/nfs_fs.h> 35 #include <linux/nfs_page.h> 36 #include <linux/workqueue.h> 37 38 struct nfs4_exception; 39 struct nfs4_opendata; 40 41 enum { 42 NFS_LSEG_VALID = 0, /* cleared when lseg is recalled/returned */ 43 NFS_LSEG_ROC, /* roc bit received from server */ 44 NFS_LSEG_LAYOUTCOMMIT, /* layoutcommit bit set for layoutcommit */ 45 NFS_LSEG_LAYOUTRETURN, /* layoutreturn bit set for layoutreturn */ 46 NFS_LSEG_UNAVAILABLE, /* unavailable bit set for temporary problem */ 47 }; 48 49 /* Individual ip address */ 50 struct nfs4_pnfs_ds_addr { 51 struct sockaddr_storage da_addr; 52 size_t da_addrlen; 53 struct list_head da_node; /* nfs4_pnfs_dev_hlist dev_dslist */ 54 char *da_remotestr; /* human readable addr+port */ 55 const char *da_netid; 56 int da_transport; 57 }; 58 59 struct nfs4_pnfs_ds { 60 struct list_head ds_node; /* nfs4_pnfs_dev_hlist dev_dslist */ 61 char *ds_remotestr; /* comma sep list of addrs */ 62 struct list_head ds_addrs; 63 struct nfs_client *ds_clp; 64 refcount_t ds_count; 65 unsigned long ds_state; 66 #define NFS4DS_CONNECTING 0 /* ds is establishing connection */ 67 }; 68 69 struct pnfs_layout_segment { 70 struct list_head pls_list; 71 struct list_head pls_lc_list; 72 struct list_head pls_commits; 73 struct pnfs_layout_range pls_range; 74 refcount_t pls_refcount; 75 u32 pls_seq; 76 unsigned long pls_flags; 77 struct pnfs_layout_hdr *pls_layout; 78 }; 79 80 enum pnfs_try_status { 81 PNFS_ATTEMPTED = 0, 82 PNFS_NOT_ATTEMPTED = 1, 83 PNFS_TRY_AGAIN = 2, 84 }; 85 86 #ifdef CONFIG_NFS_V4_1 87 88 #define LAYOUT_NFSV4_1_MODULE_PREFIX "nfs-layouttype4" 89 90 /* 91 * Default data server connection timeout and retrans vaules. 92 * Set by module parameters dataserver_timeo and dataserver_retrans. 93 */ 94 #define NFS4_DEF_DS_TIMEO 600 /* in tenths of a second */ 95 #define NFS4_DEF_DS_RETRANS 5 96 #define PNFS_DEVICE_RETRY_TIMEOUT (120*HZ) 97 98 enum { 99 NFS_LAYOUT_RO_FAILED = 0, /* get ro layout failed stop trying */ 100 NFS_LAYOUT_RW_FAILED, /* get rw layout failed stop trying */ 101 NFS_LAYOUT_BULK_RECALL, /* bulk recall affecting layout */ 102 NFS_LAYOUT_RETURN, /* layoutreturn in progress */ 103 NFS_LAYOUT_RETURN_LOCK, /* Serialise layoutreturn */ 104 NFS_LAYOUT_RETURN_REQUESTED, /* Return this layout ASAP */ 105 NFS_LAYOUT_INVALID_STID, /* layout stateid id is invalid */ 106 NFS_LAYOUT_FIRST_LAYOUTGET, /* Serialize first layoutget */ 107 NFS_LAYOUT_INODE_FREEING, /* The inode is being freed */ 108 NFS_LAYOUT_HASHED, /* The layout visible */ 109 NFS_LAYOUT_DRAIN, 110 }; 111 112 enum layoutdriver_policy_flags { 113 /* Should the pNFS client commit and return the layout upon truncate to 114 * a smaller size */ 115 PNFS_LAYOUTRET_ON_SETATTR = 1 << 0, 116 PNFS_LAYOUTRET_ON_ERROR = 1 << 1, 117 PNFS_READ_WHOLE_PAGE = 1 << 2, 118 PNFS_LAYOUTGET_ON_OPEN = 1 << 3, 119 }; 120 121 enum pnfs_layout_destroy_mode { 122 PNFS_LAYOUT_INVALIDATE = 0, 123 PNFS_LAYOUT_BULK_RETURN, 124 PNFS_LAYOUT_FILE_BULK_RETURN, 125 }; 126 127 struct nfs4_deviceid_node; 128 129 /* Per-layout driver specific registration structure */ 130 struct pnfs_layoutdriver_type { 131 struct list_head pnfs_tblid; 132 const u32 id; 133 const char *name; 134 struct module *owner; 135 unsigned flags; 136 unsigned max_layoutget_response; 137 138 int (*set_layoutdriver) (struct nfs_server *, const struct nfs_fh *); 139 int (*clear_layoutdriver) (struct nfs_server *); 140 141 struct pnfs_layout_hdr * (*alloc_layout_hdr) (struct inode *inode, gfp_t gfp_flags); 142 void (*free_layout_hdr) (struct pnfs_layout_hdr *); 143 144 struct pnfs_layout_segment * (*alloc_lseg) (struct pnfs_layout_hdr *layoutid, struct nfs4_layoutget_res *lgr, gfp_t gfp_flags); 145 void (*free_lseg) (struct pnfs_layout_segment *lseg); 146 void (*add_lseg) (struct pnfs_layout_hdr *layoutid, 147 struct pnfs_layout_segment *lseg, 148 struct list_head *free_me); 149 150 void (*return_range) (struct pnfs_layout_hdr *lo, 151 struct pnfs_layout_range *range); 152 153 /* test for nfs page cache coalescing */ 154 const struct nfs_pageio_ops *pg_read_ops; 155 const struct nfs_pageio_ops *pg_write_ops; 156 157 struct pnfs_ds_commit_info *(*get_ds_info) (struct inode *inode); 158 159 int (*sync)(struct inode *inode, bool datasync); 160 161 /* 162 * Return PNFS_ATTEMPTED to indicate the layout code has attempted 163 * I/O, else return PNFS_NOT_ATTEMPTED to fall back to normal NFS 164 */ 165 enum pnfs_try_status (*read_pagelist)(struct nfs_pgio_header *); 166 enum pnfs_try_status (*write_pagelist)(struct nfs_pgio_header *, int); 167 168 void (*free_deviceid_node) (struct nfs4_deviceid_node *); 169 struct nfs4_deviceid_node * (*alloc_deviceid_node) 170 (struct nfs_server *server, struct pnfs_device *pdev, 171 gfp_t gfp_flags); 172 173 int (*prepare_layoutreturn) (struct nfs4_layoutreturn_args *); 174 175 void (*cleanup_layoutcommit) (struct nfs4_layoutcommit_data *data); 176 int (*prepare_layoutcommit) (struct nfs4_layoutcommit_args *args); 177 int (*prepare_layoutstats) (struct nfs42_layoutstat_args *args); 178 179 void (*cancel_io)(struct pnfs_layout_segment *lseg); 180 }; 181 182 struct pnfs_commit_ops { 183 void (*setup_ds_info)(struct pnfs_ds_commit_info *, 184 struct pnfs_layout_segment *); 185 void (*release_ds_info)(struct pnfs_ds_commit_info *, 186 struct inode *inode); 187 int (*commit_pagelist)(struct inode *inode, 188 struct list_head *mds_pages, 189 int how, 190 struct nfs_commit_info *cinfo); 191 void (*mark_request_commit) (struct nfs_page *req, 192 struct pnfs_layout_segment *lseg, 193 struct nfs_commit_info *cinfo, 194 u32 ds_commit_idx); 195 void (*clear_request_commit) (struct nfs_page *req, 196 struct nfs_commit_info *cinfo); 197 int (*scan_commit_lists) (struct nfs_commit_info *cinfo, 198 int max); 199 void (*recover_commit_reqs) (struct list_head *list, 200 struct nfs_commit_info *cinfo); 201 }; 202 203 struct pnfs_layout_hdr { 204 refcount_t plh_refcount; 205 atomic_t plh_outstanding; /* number of RPCs out */ 206 struct list_head plh_layouts; /* other client layouts */ 207 struct list_head plh_bulk_destroy; 208 struct list_head plh_segs; /* layout segments list */ 209 struct list_head plh_return_segs; /* invalid layout segments */ 210 unsigned long plh_block_lgets; /* block LAYOUTGET if >0 */ 211 unsigned long plh_retry_timestamp; 212 unsigned long plh_flags; 213 nfs4_stateid plh_stateid; 214 u32 plh_barrier; /* ignore lower seqids */ 215 u32 plh_return_seq; 216 enum pnfs_iomode plh_return_iomode; 217 loff_t plh_lwb; /* last write byte for layoutcommit */ 218 const struct cred *plh_lc_cred; /* layoutcommit cred */ 219 struct inode *plh_inode; 220 struct rcu_head plh_rcu; 221 }; 222 223 struct pnfs_device { 224 struct nfs4_deviceid dev_id; 225 unsigned int layout_type; 226 unsigned int mincount; 227 unsigned int maxcount; /* gdia_maxcount */ 228 struct page **pages; 229 unsigned int pgbase; 230 unsigned int pglen; /* reply buffer length */ 231 unsigned char nocache : 1;/* May not be cached */ 232 }; 233 234 #define NFS4_PNFS_GETDEVLIST_MAXNUM 16 235 236 struct pnfs_devicelist { 237 unsigned int eof; 238 unsigned int num_devs; 239 struct nfs4_deviceid dev_id[NFS4_PNFS_GETDEVLIST_MAXNUM]; 240 }; 241 242 extern int pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *); 243 extern void pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *); 244 extern const struct pnfs_layoutdriver_type *pnfs_find_layoutdriver(u32 id); 245 extern void pnfs_put_layoutdriver(const struct pnfs_layoutdriver_type *ld); 246 247 /* nfs4proc.c */ 248 #define PNFS_FL_LAYOUTRETURN_ASYNC (1U << 0) 249 #define PNFS_FL_LAYOUTRETURN_PRIVILEGED (1U << 1) 250 251 extern size_t max_response_pages(struct nfs_server *server); 252 extern int nfs4_proc_getdeviceinfo(struct nfs_server *server, 253 struct pnfs_device *dev, 254 const struct cred *cred); 255 extern struct pnfs_layout_segment * 256 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, 257 struct nfs4_exception *exception); 258 extern int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, 259 unsigned int flags); 260 261 /* pnfs.c */ 262 void pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo); 263 void pnfs_put_lseg(struct pnfs_layout_segment *lseg); 264 265 void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, struct nfs_fsinfo *); 266 void unset_pnfs_layoutdriver(struct nfs_server *); 267 void pnfs_generic_pg_check_layout(struct nfs_pageio_descriptor *pgio, struct nfs_page *req); 268 void pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *, struct nfs_page *); 269 int pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc); 270 void pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio, 271 struct nfs_page *req, u64 wb_size); 272 void pnfs_generic_pg_cleanup(struct nfs_pageio_descriptor *); 273 int pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc); 274 size_t pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, 275 struct nfs_page *prev, struct nfs_page *req); 276 void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg); 277 struct pnfs_layout_segment *pnfs_layout_process(struct nfs4_layoutget *lgp); 278 void pnfs_layoutget_free(struct nfs4_layoutget *lgp); 279 void pnfs_free_lseg_list(struct list_head *tmp_list); 280 void pnfs_destroy_layout(struct nfs_inode *); 281 void pnfs_destroy_layout_final(struct nfs_inode *); 282 void pnfs_destroy_all_layouts(struct nfs_client *); 283 int pnfs_layout_destroy_byfsid(struct nfs_client *clp, struct nfs_fsid *fsid, 284 enum pnfs_layout_destroy_mode mode); 285 int pnfs_layout_destroy_byclid(struct nfs_client *clp, 286 enum pnfs_layout_destroy_mode mode); 287 bool nfs4_layout_refresh_old_stateid(nfs4_stateid *dst, 288 struct pnfs_layout_range *dst_range, 289 struct inode *inode); 290 void pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo); 291 void pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, 292 const nfs4_stateid *new, 293 const struct cred *cred, 294 bool update_barrier); 295 int pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, 296 struct list_head *tmp_list, 297 const struct pnfs_layout_range *recall_range, 298 u32 seq); 299 int pnfs_mark_matching_lsegs_return(struct pnfs_layout_hdr *lo, 300 struct list_head *tmp_list, 301 const struct pnfs_layout_range *recall_range, 302 u32 seq); 303 int pnfs_mark_layout_stateid_invalid(struct pnfs_layout_hdr *lo, 304 struct list_head *lseg_list); 305 bool pnfs_roc(struct inode *ino, 306 struct nfs4_layoutreturn_args *args, 307 struct nfs4_layoutreturn_res *res, 308 const struct cred *cred); 309 int pnfs_roc_done(struct rpc_task *task, struct nfs4_layoutreturn_args **argpp, 310 struct nfs4_layoutreturn_res **respp, int *ret); 311 void pnfs_roc_release(struct nfs4_layoutreturn_args *args, 312 struct nfs4_layoutreturn_res *res, 313 int ret); 314 bool pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task); 315 void pnfs_set_layoutcommit(struct inode *, struct pnfs_layout_segment *, loff_t); 316 void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data); 317 int pnfs_layoutcommit_inode(struct inode *inode, bool sync); 318 int pnfs_generic_sync(struct inode *inode, bool datasync); 319 int pnfs_nfs_generic_sync(struct inode *inode, bool datasync); 320 int _pnfs_return_layout(struct inode *); 321 int pnfs_commit_and_return_layout(struct inode *); 322 void pnfs_ld_write_done(struct nfs_pgio_header *); 323 void pnfs_ld_read_done(struct nfs_pgio_header *); 324 void pnfs_read_resend_pnfs(struct nfs_pgio_header *, unsigned int mirror_idx); 325 struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino, 326 struct nfs_open_context *ctx, 327 loff_t pos, 328 u64 count, 329 enum pnfs_iomode iomode, 330 bool strict_iomode, 331 gfp_t gfp_flags); 332 void pnfs_layoutreturn_retry_later(struct pnfs_layout_hdr *lo, 333 const nfs4_stateid *arg_stateid, 334 const struct pnfs_layout_range *range); 335 void pnfs_layoutreturn_free_lsegs(struct pnfs_layout_hdr *lo, 336 const nfs4_stateid *arg_stateid, 337 const struct pnfs_layout_range *range, 338 const nfs4_stateid *stateid); 339 340 void pnfs_generic_layout_insert_lseg(struct pnfs_layout_hdr *lo, 341 struct pnfs_layout_segment *lseg, 342 bool (*is_after)(const struct pnfs_layout_range *lseg_range, 343 const struct pnfs_layout_range *old), 344 bool (*do_merge)(struct pnfs_layout_segment *lseg, 345 struct pnfs_layout_segment *old), 346 struct list_head *free_me); 347 348 void nfs4_deviceid_mark_client_invalid(struct nfs_client *clp); 349 int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *); 350 int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *); 351 struct nfs4_threshold *pnfs_mdsthreshold_alloc(void); 352 void pnfs_error_mark_layout_for_return(struct inode *inode, 353 struct pnfs_layout_segment *lseg); 354 void pnfs_layout_return_unused_byclid(struct nfs_client *clp, 355 enum pnfs_iomode iomode); 356 int pnfs_layout_handle_reboot(struct nfs_client *clp); 357 358 /* nfs4_deviceid_flags */ 359 enum { 360 NFS_DEVICEID_INVALID = 0, /* set when MDS clientid recalled */ 361 NFS_DEVICEID_UNAVAILABLE, /* device temporarily unavailable */ 362 NFS_DEVICEID_NOCACHE, /* device may not be cached */ 363 }; 364 365 /* pnfs_dev.c */ 366 struct nfs4_deviceid_node { 367 struct hlist_node node; 368 struct hlist_node tmpnode; 369 const struct pnfs_layoutdriver_type *ld; 370 const struct nfs_client *nfs_client; 371 unsigned long flags; 372 unsigned long timestamp_unavailable; 373 struct nfs4_deviceid deviceid; 374 struct rcu_head rcu; 375 atomic_t ref; 376 }; 377 378 struct nfs4_deviceid_node * 379 nfs4_find_get_deviceid(struct nfs_server *server, 380 const struct nfs4_deviceid *id, const struct cred *cred, 381 gfp_t gfp_mask); 382 void nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *); 383 void nfs4_init_deviceid_node(struct nfs4_deviceid_node *, struct nfs_server *, 384 const struct nfs4_deviceid *); 385 bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *); 386 void nfs4_mark_deviceid_available(struct nfs4_deviceid_node *node); 387 void nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node); 388 bool nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node); 389 void nfs4_deviceid_purge_client(const struct nfs_client *); 390 391 /* pnfs_nfs.c */ 392 struct pnfs_commit_array *pnfs_alloc_commit_array(size_t n, gfp_t gfp_flags); 393 void pnfs_free_commit_array(struct pnfs_commit_array *p); 394 struct pnfs_commit_array *pnfs_add_commit_array(struct pnfs_ds_commit_info *, 395 struct pnfs_commit_array *, 396 struct pnfs_layout_segment *); 397 398 void pnfs_generic_ds_cinfo_release_lseg(struct pnfs_ds_commit_info *fl_cinfo, 399 struct pnfs_layout_segment *lseg); 400 void pnfs_generic_ds_cinfo_destroy(struct pnfs_ds_commit_info *fl_cinfo); 401 402 void pnfs_generic_clear_request_commit(struct nfs_page *req, 403 struct nfs_commit_info *cinfo); 404 void pnfs_generic_commit_release(void *calldata); 405 void pnfs_generic_prepare_to_resend_writes(struct nfs_commit_data *data); 406 void pnfs_generic_rw_release(void *data); 407 void pnfs_generic_recover_commit_reqs(struct list_head *dst, 408 struct nfs_commit_info *cinfo); 409 int pnfs_generic_commit_pagelist(struct inode *inode, 410 struct list_head *mds_pages, 411 int how, 412 struct nfs_commit_info *cinfo, 413 int (*initiate_commit)(struct nfs_commit_data *data, 414 int how)); 415 int pnfs_generic_scan_commit_lists(struct nfs_commit_info *cinfo, int max); 416 void pnfs_generic_write_commit_done(struct rpc_task *task, void *data); 417 void nfs4_pnfs_ds_put(struct nfs4_pnfs_ds *ds); 418 struct nfs4_pnfs_ds *nfs4_pnfs_ds_add(struct list_head *dsaddrs, 419 gfp_t gfp_flags); 420 void nfs4_pnfs_v3_ds_connect_unload(void); 421 int nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds, 422 struct nfs4_deviceid_node *devid, unsigned int timeo, 423 unsigned int retrans, u32 version, u32 minor_version); 424 struct nfs4_pnfs_ds_addr *nfs4_decode_mp_ds_addr(struct net *net, 425 struct xdr_stream *xdr, 426 gfp_t gfp_flags); 427 void pnfs_layout_mark_request_commit(struct nfs_page *req, 428 struct pnfs_layout_segment *lseg, 429 struct nfs_commit_info *cinfo, 430 u32 ds_commit_idx); 431 void pnfs_lgopen_prepare(struct nfs4_opendata *data, 432 struct nfs_open_context *ctx); 433 void pnfs_parse_lgopen(struct inode *ino, struct nfs4_layoutget *lgp, 434 struct nfs_open_context *ctx); 435 void nfs4_lgopen_release(struct nfs4_layoutget *lgp); 436 nfs_have_layout(struct inode * inode)437 static inline bool nfs_have_layout(struct inode *inode) 438 { 439 return NFS_I(inode)->layout != NULL; 440 } 441 pnfs_layout_is_valid(const struct pnfs_layout_hdr * lo)442 static inline bool pnfs_layout_is_valid(const struct pnfs_layout_hdr *lo) 443 { 444 return test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) == 0; 445 } 446 447 static inline struct nfs4_deviceid_node * nfs4_get_deviceid(struct nfs4_deviceid_node * d)448 nfs4_get_deviceid(struct nfs4_deviceid_node *d) 449 { 450 atomic_inc(&d->ref); 451 return d; 452 } 453 454 static inline struct pnfs_layout_segment * pnfs_get_lseg(struct pnfs_layout_segment * lseg)455 pnfs_get_lseg(struct pnfs_layout_segment *lseg) 456 { 457 if (lseg) { 458 refcount_inc(&lseg->pls_refcount); 459 smp_mb__after_atomic(); 460 } 461 return lseg; 462 } 463 464 static inline bool pnfs_is_valid_lseg(struct pnfs_layout_segment * lseg)465 pnfs_is_valid_lseg(struct pnfs_layout_segment *lseg) 466 { 467 return test_bit(NFS_LSEG_VALID, &lseg->pls_flags) != 0; 468 } 469 470 /* Return true if a layout driver is being used for this mountpoint */ pnfs_enabled_sb(struct nfs_server * nfss)471 static inline int pnfs_enabled_sb(struct nfs_server *nfss) 472 { 473 return nfss->pnfs_curr_ld != NULL; 474 } 475 476 static inline int pnfs_commit_list(struct inode * inode,struct list_head * mds_pages,int how,struct nfs_commit_info * cinfo)477 pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, 478 struct nfs_commit_info *cinfo) 479 { 480 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 481 482 if (fl_cinfo == NULL || fl_cinfo->ncommitting == 0) 483 return PNFS_NOT_ATTEMPTED; 484 return fl_cinfo->ops->commit_pagelist(inode, mds_pages, how, cinfo); 485 } 486 487 static inline struct pnfs_ds_commit_info * pnfs_get_ds_info(struct inode * inode)488 pnfs_get_ds_info(struct inode *inode) 489 { 490 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; 491 492 if (ld == NULL || ld->get_ds_info == NULL) 493 return NULL; 494 return ld->get_ds_info(inode); 495 } 496 497 static inline void pnfs_init_ds_commit_info_ops(struct pnfs_ds_commit_info * fl_cinfo,struct inode * inode)498 pnfs_init_ds_commit_info_ops(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode) 499 { 500 struct pnfs_ds_commit_info *inode_cinfo = pnfs_get_ds_info(inode); 501 if (inode_cinfo != NULL) 502 fl_cinfo->ops = inode_cinfo->ops; 503 } 504 505 static inline void pnfs_init_ds_commit_info(struct pnfs_ds_commit_info * fl_cinfo)506 pnfs_init_ds_commit_info(struct pnfs_ds_commit_info *fl_cinfo) 507 { 508 INIT_LIST_HEAD(&fl_cinfo->commits); 509 fl_cinfo->ops = NULL; 510 } 511 512 static inline void pnfs_release_ds_info(struct pnfs_ds_commit_info * fl_cinfo,struct inode * inode)513 pnfs_release_ds_info(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode) 514 { 515 if (fl_cinfo->ops != NULL && fl_cinfo->ops->release_ds_info != NULL) 516 fl_cinfo->ops->release_ds_info(fl_cinfo, inode); 517 } 518 519 static inline void pnfs_generic_mark_devid_invalid(struct nfs4_deviceid_node * node)520 pnfs_generic_mark_devid_invalid(struct nfs4_deviceid_node *node) 521 { 522 set_bit(NFS_DEVICEID_INVALID, &node->flags); 523 } 524 525 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)526 pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, 527 struct nfs_commit_info *cinfo, u32 ds_commit_idx) 528 { 529 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 530 531 if (!lseg || !fl_cinfo->ops || !fl_cinfo->ops->mark_request_commit) 532 return false; 533 fl_cinfo->ops->mark_request_commit(req, lseg, cinfo, ds_commit_idx); 534 return true; 535 } 536 537 static inline bool pnfs_clear_request_commit(struct nfs_page * req,struct nfs_commit_info * cinfo)538 pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) 539 { 540 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 541 542 if (!fl_cinfo || !fl_cinfo->ops || !fl_cinfo->ops->clear_request_commit) 543 return false; 544 fl_cinfo->ops->clear_request_commit(req, cinfo); 545 return true; 546 } 547 548 static inline int pnfs_scan_commit_lists(struct inode * inode,struct nfs_commit_info * cinfo,int max)549 pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, 550 int max) 551 { 552 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 553 554 if (!fl_cinfo || fl_cinfo->nwritten == 0) 555 return 0; 556 return fl_cinfo->ops->scan_commit_lists(cinfo, max); 557 } 558 559 static inline void pnfs_recover_commit_reqs(struct list_head * head,struct nfs_commit_info * cinfo)560 pnfs_recover_commit_reqs(struct list_head *head, struct nfs_commit_info *cinfo) 561 { 562 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 563 564 if (fl_cinfo && fl_cinfo->nwritten != 0) 565 fl_cinfo->ops->recover_commit_reqs(head, cinfo); 566 } 567 568 /* Should the pNFS client commit and return the layout upon a setattr */ 569 static inline bool pnfs_ld_layoutret_on_setattr(struct inode * inode)570 pnfs_ld_layoutret_on_setattr(struct inode *inode) 571 { 572 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 573 return false; 574 return NFS_SERVER(inode)->pnfs_curr_ld->flags & 575 PNFS_LAYOUTRET_ON_SETATTR; 576 } 577 578 static inline bool pnfs_ld_read_whole_page(struct inode * inode)579 pnfs_ld_read_whole_page(struct inode *inode) 580 { 581 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 582 return false; 583 return NFS_SERVER(inode)->pnfs_curr_ld->flags & PNFS_READ_WHOLE_PAGE; 584 } 585 586 static inline int pnfs_sync_inode(struct inode * inode,bool datasync)587 pnfs_sync_inode(struct inode *inode, bool datasync) 588 { 589 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 590 return 0; 591 return NFS_SERVER(inode)->pnfs_curr_ld->sync(inode, datasync); 592 } 593 594 static inline bool pnfs_layoutcommit_outstanding(struct inode * inode)595 pnfs_layoutcommit_outstanding(struct inode *inode) 596 { 597 struct nfs_inode *nfsi = NFS_I(inode); 598 599 return test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags) != 0 || 600 test_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags) != 0; 601 } 602 pnfs_return_layout(struct inode * ino)603 static inline int pnfs_return_layout(struct inode *ino) 604 { 605 struct nfs_inode *nfsi = NFS_I(ino); 606 struct nfs_server *nfss = NFS_SERVER(ino); 607 608 if (pnfs_enabled_sb(nfss) && nfsi->layout) { 609 set_bit(NFS_LAYOUT_RETURN_REQUESTED, &nfsi->layout->plh_flags); 610 return _pnfs_return_layout(ino); 611 } 612 613 return 0; 614 } 615 616 static inline bool pnfs_use_threshold(struct nfs4_threshold ** dst,struct nfs4_threshold * src,struct nfs_server * nfss)617 pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, 618 struct nfs_server *nfss) 619 { 620 return (dst && src && src->bm != 0 && nfss->pnfs_curr_ld && 621 nfss->pnfs_curr_ld->id == src->l_type); 622 } 623 624 static inline u64 pnfs_calc_offset_end(u64 offset,u64 len)625 pnfs_calc_offset_end(u64 offset, u64 len) 626 { 627 if (len == NFS4_MAX_UINT64 || len >= NFS4_MAX_UINT64 - offset) 628 return NFS4_MAX_UINT64; 629 return offset + len - 1; 630 } 631 632 static inline u64 pnfs_calc_offset_length(u64 offset,u64 end)633 pnfs_calc_offset_length(u64 offset, u64 end) 634 { 635 if (end == NFS4_MAX_UINT64 || end <= offset) 636 return NFS4_MAX_UINT64; 637 return 1 + end - offset; 638 } 639 640 static inline void pnfs_copy_range(struct pnfs_layout_range * dst,const struct pnfs_layout_range * src)641 pnfs_copy_range(struct pnfs_layout_range *dst, 642 const struct pnfs_layout_range *src) 643 { 644 memcpy(dst, src, sizeof(*dst)); 645 } 646 647 static inline u64 pnfs_end_offset(u64 start,u64 len)648 pnfs_end_offset(u64 start, u64 len) 649 { 650 if (NFS4_MAX_UINT64 - start <= len) 651 return NFS4_MAX_UINT64; 652 return start + len; 653 } 654 655 /* 656 * Are 2 ranges intersecting? 657 * start1 end1 658 * [----------------------------------) 659 * start2 end2 660 * [----------------) 661 */ 662 static inline bool pnfs_is_range_intersecting(u64 start1,u64 end1,u64 start2,u64 end2)663 pnfs_is_range_intersecting(u64 start1, u64 end1, u64 start2, u64 end2) 664 { 665 return (end1 == NFS4_MAX_UINT64 || start2 < end1) && 666 (end2 == NFS4_MAX_UINT64 || start1 < end2); 667 } 668 669 static inline bool pnfs_lseg_range_intersecting(const struct pnfs_layout_range * l1,const struct pnfs_layout_range * l2)670 pnfs_lseg_range_intersecting(const struct pnfs_layout_range *l1, 671 const struct pnfs_layout_range *l2) 672 { 673 u64 end1 = pnfs_end_offset(l1->offset, l1->length); 674 u64 end2 = pnfs_end_offset(l2->offset, l2->length); 675 676 return pnfs_is_range_intersecting(l1->offset, end1, l2->offset, end2); 677 } 678 679 static inline bool pnfs_lseg_request_intersecting(struct pnfs_layout_segment * lseg,struct nfs_page * req)680 pnfs_lseg_request_intersecting(struct pnfs_layout_segment *lseg, struct nfs_page *req) 681 { 682 u64 seg_last = pnfs_end_offset(lseg->pls_range.offset, lseg->pls_range.length); 683 u64 req_last = req_offset(req) + req->wb_bytes; 684 685 return pnfs_is_range_intersecting(lseg->pls_range.offset, seg_last, 686 req_offset(req), req_last); 687 } 688 pnfs_lseg_cancel_io(struct nfs_server * server,struct pnfs_layout_segment * lseg)689 static inline void pnfs_lseg_cancel_io(struct nfs_server *server, 690 struct pnfs_layout_segment *lseg) 691 { 692 if (server->pnfs_curr_ld->cancel_io) 693 server->pnfs_curr_ld->cancel_io(lseg); 694 } 695 696 extern unsigned int layoutstats_timer; 697 698 #ifdef NFS_DEBUG 699 void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id); 700 #else nfs4_print_deviceid(const struct nfs4_deviceid * dev_id)701 static inline void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id) 702 { 703 } 704 705 #endif /* NFS_DEBUG */ 706 #else /* CONFIG_NFS_V4_1 */ 707 nfs_have_layout(struct inode * inode)708 static inline bool nfs_have_layout(struct inode *inode) 709 { 710 return false; 711 } 712 pnfs_destroy_all_layouts(struct nfs_client * clp)713 static inline void pnfs_destroy_all_layouts(struct nfs_client *clp) 714 { 715 } 716 pnfs_destroy_layout(struct nfs_inode * nfsi)717 static inline void pnfs_destroy_layout(struct nfs_inode *nfsi) 718 { 719 } 720 pnfs_destroy_layout_final(struct nfs_inode * nfsi)721 static inline void pnfs_destroy_layout_final(struct nfs_inode *nfsi) 722 { 723 } 724 pnfs_layout_handle_reboot(struct nfs_client * clp)725 static inline int pnfs_layout_handle_reboot(struct nfs_client *clp) 726 { 727 return 0; 728 } 729 730 static inline struct pnfs_layout_segment * pnfs_get_lseg(struct pnfs_layout_segment * lseg)731 pnfs_get_lseg(struct pnfs_layout_segment *lseg) 732 { 733 return NULL; 734 } 735 pnfs_put_lseg(struct pnfs_layout_segment * lseg)736 static inline void pnfs_put_lseg(struct pnfs_layout_segment *lseg) 737 { 738 } 739 pnfs_return_layout(struct inode * ino)740 static inline int pnfs_return_layout(struct inode *ino) 741 { 742 return 0; 743 } 744 pnfs_commit_and_return_layout(struct inode * inode)745 static inline int pnfs_commit_and_return_layout(struct inode *inode) 746 { 747 return 0; 748 } 749 750 static inline bool pnfs_ld_layoutret_on_setattr(struct inode * inode)751 pnfs_ld_layoutret_on_setattr(struct inode *inode) 752 { 753 return false; 754 } 755 756 static inline bool pnfs_ld_read_whole_page(struct inode * inode)757 pnfs_ld_read_whole_page(struct inode *inode) 758 { 759 return false; 760 } 761 762 static inline int pnfs_sync_inode(struct inode * inode,bool datasync)763 pnfs_sync_inode(struct inode *inode, bool datasync) 764 { 765 return 0; 766 } 767 768 static inline bool pnfs_layoutcommit_outstanding(struct inode * inode)769 pnfs_layoutcommit_outstanding(struct inode *inode) 770 { 771 return false; 772 } 773 774 775 static inline bool pnfs_roc(struct inode * ino,struct nfs4_layoutreturn_args * args,struct nfs4_layoutreturn_res * res,const struct cred * cred)776 pnfs_roc(struct inode *ino, 777 struct nfs4_layoutreturn_args *args, 778 struct nfs4_layoutreturn_res *res, 779 const struct cred *cred) 780 { 781 return false; 782 } 783 784 static inline int pnfs_roc_done(struct rpc_task * task,struct nfs4_layoutreturn_args ** argpp,struct nfs4_layoutreturn_res ** respp,int * ret)785 pnfs_roc_done(struct rpc_task *task, 786 struct nfs4_layoutreturn_args **argpp, 787 struct nfs4_layoutreturn_res **respp, 788 int *ret) 789 { 790 return 0; 791 } 792 793 static inline void pnfs_roc_release(struct nfs4_layoutreturn_args * args,struct nfs4_layoutreturn_res * res,int ret)794 pnfs_roc_release(struct nfs4_layoutreturn_args *args, 795 struct nfs4_layoutreturn_res *res, 796 int ret) 797 { 798 } 799 800 static inline bool pnfs_wait_on_layoutreturn(struct inode * ino,struct rpc_task * task)801 pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task) 802 { 803 return false; 804 } 805 set_pnfs_layoutdriver(struct nfs_server * s,const struct nfs_fh * mntfh,struct nfs_fsinfo * fsinfo)806 static inline void set_pnfs_layoutdriver(struct nfs_server *s, 807 const struct nfs_fh *mntfh, 808 struct nfs_fsinfo *fsinfo) 809 { 810 } 811 unset_pnfs_layoutdriver(struct nfs_server * s)812 static inline void unset_pnfs_layoutdriver(struct nfs_server *s) 813 { 814 } 815 816 static inline int pnfs_commit_list(struct inode * inode,struct list_head * mds_pages,int how,struct nfs_commit_info * cinfo)817 pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, 818 struct nfs_commit_info *cinfo) 819 { 820 return PNFS_NOT_ATTEMPTED; 821 } 822 823 static inline struct pnfs_ds_commit_info * pnfs_get_ds_info(struct inode * inode)824 pnfs_get_ds_info(struct inode *inode) 825 { 826 return NULL; 827 } 828 829 static inline void pnfs_init_ds_commit_info_ops(struct pnfs_ds_commit_info * fl_cinfo,struct inode * inode)830 pnfs_init_ds_commit_info_ops(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode) 831 { 832 } 833 834 static inline void pnfs_init_ds_commit_info(struct pnfs_ds_commit_info * fl_cinfo)835 pnfs_init_ds_commit_info(struct pnfs_ds_commit_info *fl_cinfo) 836 { 837 } 838 839 static inline void pnfs_release_ds_info(struct pnfs_ds_commit_info * fl_cinfo,struct inode * inode)840 pnfs_release_ds_info(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode) 841 { 842 } 843 844 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)845 pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, 846 struct nfs_commit_info *cinfo, u32 ds_commit_idx) 847 { 848 return false; 849 } 850 851 static inline bool pnfs_clear_request_commit(struct nfs_page * req,struct nfs_commit_info * cinfo)852 pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) 853 { 854 return false; 855 } 856 857 static inline int pnfs_scan_commit_lists(struct inode * inode,struct nfs_commit_info * cinfo,int max)858 pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, 859 int max) 860 { 861 return 0; 862 } 863 864 static inline void pnfs_recover_commit_reqs(struct list_head * head,struct nfs_commit_info * cinfo)865 pnfs_recover_commit_reqs(struct list_head *head, struct nfs_commit_info *cinfo) 866 { 867 } 868 pnfs_layoutcommit_inode(struct inode * inode,bool sync)869 static inline int pnfs_layoutcommit_inode(struct inode *inode, bool sync) 870 { 871 return 0; 872 } 873 874 static inline bool pnfs_use_threshold(struct nfs4_threshold ** dst,struct nfs4_threshold * src,struct nfs_server * nfss)875 pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, 876 struct nfs_server *nfss) 877 { 878 return false; 879 } 880 pnfs_mdsthreshold_alloc(void)881 static inline struct nfs4_threshold *pnfs_mdsthreshold_alloc(void) 882 { 883 return NULL; 884 } 885 nfs4_pnfs_v3_ds_connect_unload(void)886 static inline void nfs4_pnfs_v3_ds_connect_unload(void) 887 { 888 } 889 nfs4_layout_refresh_old_stateid(nfs4_stateid * dst,struct pnfs_layout_range * dst_range,struct inode * inode)890 static inline bool nfs4_layout_refresh_old_stateid(nfs4_stateid *dst, 891 struct pnfs_layout_range *dst_range, 892 struct inode *inode) 893 { 894 return false; 895 } 896 pnfs_lgopen_prepare(struct nfs4_opendata * data,struct nfs_open_context * ctx)897 static inline void pnfs_lgopen_prepare(struct nfs4_opendata *data, 898 struct nfs_open_context *ctx) 899 { 900 } 901 pnfs_parse_lgopen(struct inode * ino,struct nfs4_layoutget * lgp,struct nfs_open_context * ctx)902 static inline void pnfs_parse_lgopen(struct inode *ino, 903 struct nfs4_layoutget *lgp, 904 struct nfs_open_context *ctx) 905 { 906 } 907 nfs4_lgopen_release(struct nfs4_layoutget * lgp)908 static inline void nfs4_lgopen_release(struct nfs4_layoutget *lgp) 909 { 910 } 911 pnfs_layout_is_valid(const struct pnfs_layout_hdr * lo)912 static inline bool pnfs_layout_is_valid(const struct pnfs_layout_hdr *lo) 913 { 914 return false; 915 } 916 917 #endif /* CONFIG_NFS_V4_1 */ 918 919 #if IS_ENABLED(CONFIG_NFS_V4_2) 920 int pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags); 921 #else 922 static inline int pnfs_report_layoutstat(struct inode * inode,gfp_t gfp_flags)923 pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags) 924 { 925 return 0; 926 } 927 #endif 928 929 #endif /* FS_NFS_PNFS_H */ 930