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 38struct nfs4_exception; 39struct nfs4_opendata; 40 41enum { 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 */ 50struct 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 59struct 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 69struct 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 80enum 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 98enum { 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 112enum 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 121struct nfs4_deviceid_node; 122 123/* Per-layout driver specific registration structure */ 124struct pnfs_layoutdriver_type { 125 struct list_head pnfs_tblid; 126 const u32 id; 127 const char *name; 128 struct module *owner; 129 unsigned flags; 130 unsigned max_deviceinfo_size; 131 unsigned max_layoutget_response; 132 133 int (*set_layoutdriver) (struct nfs_server *, const struct nfs_fh *); 134 int (*clear_layoutdriver) (struct nfs_server *); 135 136 struct pnfs_layout_hdr * (*alloc_layout_hdr) (struct inode *inode, gfp_t gfp_flags); 137 void (*free_layout_hdr) (struct pnfs_layout_hdr *); 138 139 struct pnfs_layout_segment * (*alloc_lseg) (struct pnfs_layout_hdr *layoutid, struct nfs4_layoutget_res *lgr, gfp_t gfp_flags); 140 void (*free_lseg) (struct pnfs_layout_segment *lseg); 141 void (*add_lseg) (struct pnfs_layout_hdr *layoutid, 142 struct pnfs_layout_segment *lseg, 143 struct list_head *free_me); 144 145 void (*return_range) (struct pnfs_layout_hdr *lo, 146 struct pnfs_layout_range *range); 147 148 /* test for nfs page cache coalescing */ 149 const struct nfs_pageio_ops *pg_read_ops; 150 const struct nfs_pageio_ops *pg_write_ops; 151 152 struct pnfs_ds_commit_info *(*get_ds_info) (struct inode *inode); 153 154 int (*sync)(struct inode *inode, bool datasync); 155 156 /* 157 * Return PNFS_ATTEMPTED to indicate the layout code has attempted 158 * I/O, else return PNFS_NOT_ATTEMPTED to fall back to normal NFS 159 */ 160 enum pnfs_try_status (*read_pagelist)(struct nfs_pgio_header *); 161 enum pnfs_try_status (*write_pagelist)(struct nfs_pgio_header *, int); 162 163 void (*free_deviceid_node) (struct nfs4_deviceid_node *); 164 struct nfs4_deviceid_node * (*alloc_deviceid_node) 165 (struct nfs_server *server, struct pnfs_device *pdev, 166 gfp_t gfp_flags); 167 168 int (*prepare_layoutreturn) (struct nfs4_layoutreturn_args *); 169 170 void (*cleanup_layoutcommit) (struct nfs4_layoutcommit_data *data); 171 int (*prepare_layoutcommit) (struct nfs4_layoutcommit_args *args); 172 int (*prepare_layoutstats) (struct nfs42_layoutstat_args *args); 173 174 void (*cancel_io)(struct pnfs_layout_segment *lseg); 175}; 176 177struct pnfs_commit_ops { 178 void (*setup_ds_info)(struct pnfs_ds_commit_info *, 179 struct pnfs_layout_segment *); 180 void (*release_ds_info)(struct pnfs_ds_commit_info *, 181 struct inode *inode); 182 int (*commit_pagelist)(struct inode *inode, 183 struct list_head *mds_pages, 184 int how, 185 struct nfs_commit_info *cinfo); 186 void (*mark_request_commit) (struct nfs_page *req, 187 struct pnfs_layout_segment *lseg, 188 struct nfs_commit_info *cinfo, 189 u32 ds_commit_idx); 190 void (*clear_request_commit) (struct nfs_page *req, 191 struct nfs_commit_info *cinfo); 192 int (*scan_commit_lists) (struct nfs_commit_info *cinfo, 193 int max); 194 void (*recover_commit_reqs) (struct list_head *list, 195 struct nfs_commit_info *cinfo); 196 struct nfs_page * (*search_commit_reqs)(struct nfs_commit_info *cinfo, 197 struct folio *folio); 198}; 199 200struct pnfs_layout_hdr { 201 refcount_t plh_refcount; 202 atomic_t plh_outstanding; /* number of RPCs out */ 203 struct list_head plh_layouts; /* other client layouts */ 204 struct list_head plh_bulk_destroy; 205 struct list_head plh_segs; /* layout segments list */ 206 struct list_head plh_return_segs; /* invalid layout segments */ 207 unsigned long plh_block_lgets; /* block LAYOUTGET if >0 */ 208 unsigned long plh_retry_timestamp; 209 unsigned long plh_flags; 210 nfs4_stateid plh_stateid; 211 u32 plh_barrier; /* ignore lower seqids */ 212 u32 plh_return_seq; 213 enum pnfs_iomode plh_return_iomode; 214 loff_t plh_lwb; /* last write byte for layoutcommit */ 215 const struct cred *plh_lc_cred; /* layoutcommit cred */ 216 struct inode *plh_inode; 217 struct rcu_head plh_rcu; 218}; 219 220struct pnfs_device { 221 struct nfs4_deviceid dev_id; 222 unsigned int layout_type; 223 unsigned int mincount; 224 unsigned int maxcount; /* gdia_maxcount */ 225 struct page **pages; 226 unsigned int pgbase; 227 unsigned int pglen; /* reply buffer length */ 228 unsigned char nocache : 1;/* May not be cached */ 229}; 230 231#define NFS4_PNFS_GETDEVLIST_MAXNUM 16 232 233struct pnfs_devicelist { 234 unsigned int eof; 235 unsigned int num_devs; 236 struct nfs4_deviceid dev_id[NFS4_PNFS_GETDEVLIST_MAXNUM]; 237}; 238 239extern int pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *); 240extern void pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *); 241extern const struct pnfs_layoutdriver_type *pnfs_find_layoutdriver(u32 id); 242extern void pnfs_put_layoutdriver(const struct pnfs_layoutdriver_type *ld); 243 244/* nfs4proc.c */ 245extern size_t max_response_pages(struct nfs_server *server); 246extern int nfs4_proc_getdeviceinfo(struct nfs_server *server, 247 struct pnfs_device *dev, 248 const struct cred *cred); 249extern struct pnfs_layout_segment * 250nfs4_proc_layoutget(struct nfs4_layoutget *lgp, 251 struct nfs4_exception *exception); 252extern int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync); 253 254/* pnfs.c */ 255void pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo); 256void pnfs_put_lseg(struct pnfs_layout_segment *lseg); 257 258void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, struct nfs_fsinfo *); 259void unset_pnfs_layoutdriver(struct nfs_server *); 260void pnfs_generic_pg_check_layout(struct nfs_pageio_descriptor *pgio); 261void pnfs_generic_pg_check_range(struct nfs_pageio_descriptor *pgio, struct nfs_page *req); 262void pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *, struct nfs_page *); 263int pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc); 264void pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio, 265 struct nfs_page *req, u64 wb_size); 266void pnfs_generic_pg_cleanup(struct nfs_pageio_descriptor *); 267int pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc); 268size_t pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, 269 struct nfs_page *prev, struct nfs_page *req); 270void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg); 271struct pnfs_layout_segment *pnfs_layout_process(struct nfs4_layoutget *lgp); 272void pnfs_layoutget_free(struct nfs4_layoutget *lgp); 273void pnfs_free_lseg_list(struct list_head *tmp_list); 274void pnfs_destroy_layout(struct nfs_inode *); 275void pnfs_destroy_layout_final(struct nfs_inode *); 276void pnfs_destroy_all_layouts(struct nfs_client *); 277int pnfs_destroy_layouts_byfsid(struct nfs_client *clp, 278 struct nfs_fsid *fsid, 279 bool is_recall); 280int pnfs_destroy_layouts_byclid(struct nfs_client *clp, 281 bool is_recall); 282bool nfs4_layout_refresh_old_stateid(nfs4_stateid *dst, 283 struct pnfs_layout_range *dst_range, 284 struct inode *inode); 285void pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo); 286void pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, 287 const nfs4_stateid *new, 288 const struct cred *cred, 289 bool update_barrier); 290int pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, 291 struct list_head *tmp_list, 292 const struct pnfs_layout_range *recall_range, 293 u32 seq); 294int pnfs_mark_matching_lsegs_return(struct pnfs_layout_hdr *lo, 295 struct list_head *tmp_list, 296 const struct pnfs_layout_range *recall_range, 297 u32 seq); 298int pnfs_mark_layout_stateid_invalid(struct pnfs_layout_hdr *lo, 299 struct list_head *lseg_list); 300bool pnfs_roc(struct inode *ino, 301 struct nfs4_layoutreturn_args *args, 302 struct nfs4_layoutreturn_res *res, 303 const struct cred *cred); 304int pnfs_roc_done(struct rpc_task *task, struct nfs4_layoutreturn_args **argpp, 305 struct nfs4_layoutreturn_res **respp, int *ret); 306void pnfs_roc_release(struct nfs4_layoutreturn_args *args, 307 struct nfs4_layoutreturn_res *res, 308 int ret); 309bool pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task); 310void pnfs_set_layoutcommit(struct inode *, struct pnfs_layout_segment *, loff_t); 311void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data); 312int pnfs_layoutcommit_inode(struct inode *inode, bool sync); 313int pnfs_generic_sync(struct inode *inode, bool datasync); 314int pnfs_nfs_generic_sync(struct inode *inode, bool datasync); 315int _pnfs_return_layout(struct inode *); 316int pnfs_commit_and_return_layout(struct inode *); 317void pnfs_ld_write_done(struct nfs_pgio_header *); 318void pnfs_ld_read_done(struct nfs_pgio_header *); 319void pnfs_read_resend_pnfs(struct nfs_pgio_header *, unsigned int mirror_idx); 320struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino, 321 struct nfs_open_context *ctx, 322 loff_t pos, 323 u64 count, 324 enum pnfs_iomode iomode, 325 bool strict_iomode, 326 gfp_t gfp_flags); 327void pnfs_layoutreturn_free_lsegs(struct pnfs_layout_hdr *lo, 328 const nfs4_stateid *arg_stateid, 329 const struct pnfs_layout_range *range, 330 const nfs4_stateid *stateid); 331 332void pnfs_generic_layout_insert_lseg(struct pnfs_layout_hdr *lo, 333 struct pnfs_layout_segment *lseg, 334 bool (*is_after)(const struct pnfs_layout_range *lseg_range, 335 const struct pnfs_layout_range *old), 336 bool (*do_merge)(struct pnfs_layout_segment *lseg, 337 struct pnfs_layout_segment *old), 338 struct list_head *free_me); 339 340void nfs4_deviceid_mark_client_invalid(struct nfs_client *clp); 341int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *); 342int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *); 343struct nfs4_threshold *pnfs_mdsthreshold_alloc(void); 344void pnfs_error_mark_layout_for_return(struct inode *inode, 345 struct pnfs_layout_segment *lseg); 346void pnfs_layout_return_unused_byclid(struct nfs_client *clp, 347 enum pnfs_iomode iomode); 348 349/* nfs4_deviceid_flags */ 350enum { 351 NFS_DEVICEID_INVALID = 0, /* set when MDS clientid recalled */ 352 NFS_DEVICEID_UNAVAILABLE, /* device temporarily unavailable */ 353 NFS_DEVICEID_NOCACHE, /* device may not be cached */ 354}; 355 356/* pnfs_dev.c */ 357struct nfs4_deviceid_node { 358 struct hlist_node node; 359 struct hlist_node tmpnode; 360 const struct pnfs_layoutdriver_type *ld; 361 const struct nfs_client *nfs_client; 362 unsigned long flags; 363 unsigned long timestamp_unavailable; 364 struct nfs4_deviceid deviceid; 365 struct rcu_head rcu; 366 atomic_t ref; 367}; 368 369struct nfs4_deviceid_node * 370nfs4_find_get_deviceid(struct nfs_server *server, 371 const struct nfs4_deviceid *id, const struct cred *cred, 372 gfp_t gfp_mask); 373void nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *); 374void nfs4_init_deviceid_node(struct nfs4_deviceid_node *, struct nfs_server *, 375 const struct nfs4_deviceid *); 376bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *); 377void nfs4_mark_deviceid_available(struct nfs4_deviceid_node *node); 378void nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node); 379bool nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node); 380void nfs4_deviceid_purge_client(const struct nfs_client *); 381 382/* pnfs_nfs.c */ 383struct pnfs_commit_array *pnfs_alloc_commit_array(size_t n, gfp_t gfp_flags); 384void pnfs_free_commit_array(struct pnfs_commit_array *p); 385struct pnfs_commit_array *pnfs_add_commit_array(struct pnfs_ds_commit_info *, 386 struct pnfs_commit_array *, 387 struct pnfs_layout_segment *); 388 389void pnfs_generic_ds_cinfo_release_lseg(struct pnfs_ds_commit_info *fl_cinfo, 390 struct pnfs_layout_segment *lseg); 391void pnfs_generic_ds_cinfo_destroy(struct pnfs_ds_commit_info *fl_cinfo); 392 393void pnfs_generic_clear_request_commit(struct nfs_page *req, 394 struct nfs_commit_info *cinfo); 395void pnfs_generic_commit_release(void *calldata); 396void pnfs_generic_prepare_to_resend_writes(struct nfs_commit_data *data); 397void pnfs_generic_rw_release(void *data); 398void pnfs_generic_recover_commit_reqs(struct list_head *dst, 399 struct nfs_commit_info *cinfo); 400struct nfs_page *pnfs_generic_search_commit_reqs(struct nfs_commit_info *cinfo, 401 struct folio *folio); 402int pnfs_generic_commit_pagelist(struct inode *inode, 403 struct list_head *mds_pages, 404 int how, 405 struct nfs_commit_info *cinfo, 406 int (*initiate_commit)(struct nfs_commit_data *data, 407 int how)); 408int pnfs_generic_scan_commit_lists(struct nfs_commit_info *cinfo, int max); 409void pnfs_generic_write_commit_done(struct rpc_task *task, void *data); 410void nfs4_pnfs_ds_put(struct nfs4_pnfs_ds *ds); 411struct nfs4_pnfs_ds *nfs4_pnfs_ds_add(struct list_head *dsaddrs, 412 gfp_t gfp_flags); 413void nfs4_pnfs_v3_ds_connect_unload(void); 414int nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds, 415 struct nfs4_deviceid_node *devid, unsigned int timeo, 416 unsigned int retrans, u32 version, u32 minor_version); 417struct nfs4_pnfs_ds_addr *nfs4_decode_mp_ds_addr(struct net *net, 418 struct xdr_stream *xdr, 419 gfp_t gfp_flags); 420void pnfs_layout_mark_request_commit(struct nfs_page *req, 421 struct pnfs_layout_segment *lseg, 422 struct nfs_commit_info *cinfo, 423 u32 ds_commit_idx); 424void pnfs_lgopen_prepare(struct nfs4_opendata *data, 425 struct nfs_open_context *ctx); 426void pnfs_parse_lgopen(struct inode *ino, struct nfs4_layoutget *lgp, 427 struct nfs_open_context *ctx); 428void nfs4_lgopen_release(struct nfs4_layoutget *lgp); 429 430static inline bool nfs_have_layout(struct inode *inode) 431{ 432 return NFS_I(inode)->layout != NULL; 433} 434 435static inline bool pnfs_layout_is_valid(const struct pnfs_layout_hdr *lo) 436{ 437 return test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) == 0; 438} 439 440static inline struct nfs4_deviceid_node * 441nfs4_get_deviceid(struct nfs4_deviceid_node *d) 442{ 443 atomic_inc(&d->ref); 444 return d; 445} 446 447static inline struct pnfs_layout_segment * 448pnfs_get_lseg(struct pnfs_layout_segment *lseg) 449{ 450 if (lseg) { 451 refcount_inc(&lseg->pls_refcount); 452 smp_mb__after_atomic(); 453 } 454 return lseg; 455} 456 457static inline bool 458pnfs_is_valid_lseg(struct pnfs_layout_segment *lseg) 459{ 460 return test_bit(NFS_LSEG_VALID, &lseg->pls_flags) != 0; 461} 462 463/* Return true if a layout driver is being used for this mountpoint */ 464static inline int pnfs_enabled_sb(struct nfs_server *nfss) 465{ 466 return nfss->pnfs_curr_ld != NULL; 467} 468 469static inline int 470pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, 471 struct nfs_commit_info *cinfo) 472{ 473 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 474 475 if (fl_cinfo == NULL || fl_cinfo->ncommitting == 0) 476 return PNFS_NOT_ATTEMPTED; 477 return fl_cinfo->ops->commit_pagelist(inode, mds_pages, how, cinfo); 478} 479 480static inline struct pnfs_ds_commit_info * 481pnfs_get_ds_info(struct inode *inode) 482{ 483 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; 484 485 if (ld == NULL || ld->get_ds_info == NULL) 486 return NULL; 487 return ld->get_ds_info(inode); 488} 489 490static inline void 491pnfs_init_ds_commit_info_ops(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode) 492{ 493 struct pnfs_ds_commit_info *inode_cinfo = pnfs_get_ds_info(inode); 494 if (inode_cinfo != NULL) 495 fl_cinfo->ops = inode_cinfo->ops; 496} 497 498static inline void 499pnfs_init_ds_commit_info(struct pnfs_ds_commit_info *fl_cinfo) 500{ 501 INIT_LIST_HEAD(&fl_cinfo->commits); 502 fl_cinfo->ops = NULL; 503} 504 505static inline void 506pnfs_release_ds_info(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode) 507{ 508 if (fl_cinfo->ops != NULL && fl_cinfo->ops->release_ds_info != NULL) 509 fl_cinfo->ops->release_ds_info(fl_cinfo, inode); 510} 511 512static inline void 513pnfs_generic_mark_devid_invalid(struct nfs4_deviceid_node *node) 514{ 515 set_bit(NFS_DEVICEID_INVALID, &node->flags); 516} 517 518static inline bool 519pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, 520 struct nfs_commit_info *cinfo, u32 ds_commit_idx) 521{ 522 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 523 524 if (!lseg || !fl_cinfo->ops || !fl_cinfo->ops->mark_request_commit) 525 return false; 526 fl_cinfo->ops->mark_request_commit(req, lseg, cinfo, ds_commit_idx); 527 return true; 528} 529 530static inline bool 531pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) 532{ 533 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 534 535 if (!fl_cinfo || !fl_cinfo->ops || !fl_cinfo->ops->clear_request_commit) 536 return false; 537 fl_cinfo->ops->clear_request_commit(req, cinfo); 538 return true; 539} 540 541static inline int 542pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, 543 int max) 544{ 545 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 546 547 if (!fl_cinfo || fl_cinfo->nwritten == 0) 548 return 0; 549 return fl_cinfo->ops->scan_commit_lists(cinfo, max); 550} 551 552static inline void 553pnfs_recover_commit_reqs(struct list_head *head, struct nfs_commit_info *cinfo) 554{ 555 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 556 557 if (fl_cinfo && fl_cinfo->nwritten != 0) 558 fl_cinfo->ops->recover_commit_reqs(head, cinfo); 559} 560 561static inline struct nfs_page * 562pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo, 563 struct folio *folio) 564{ 565 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 566 567 if (!fl_cinfo->ops || !fl_cinfo->ops->search_commit_reqs) 568 return NULL; 569 return fl_cinfo->ops->search_commit_reqs(cinfo, folio); 570} 571 572/* Should the pNFS client commit and return the layout upon a setattr */ 573static inline bool 574pnfs_ld_layoutret_on_setattr(struct inode *inode) 575{ 576 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 577 return false; 578 return NFS_SERVER(inode)->pnfs_curr_ld->flags & 579 PNFS_LAYOUTRET_ON_SETATTR; 580} 581 582static inline bool 583pnfs_ld_read_whole_page(struct inode *inode) 584{ 585 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 586 return false; 587 return NFS_SERVER(inode)->pnfs_curr_ld->flags & PNFS_READ_WHOLE_PAGE; 588} 589 590static inline int 591pnfs_sync_inode(struct inode *inode, bool datasync) 592{ 593 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 594 return 0; 595 return NFS_SERVER(inode)->pnfs_curr_ld->sync(inode, datasync); 596} 597 598static inline bool 599pnfs_layoutcommit_outstanding(struct inode *inode) 600{ 601 struct nfs_inode *nfsi = NFS_I(inode); 602 603 return test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags) != 0 || 604 test_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags) != 0; 605} 606 607static inline int pnfs_return_layout(struct inode *ino) 608{ 609 struct nfs_inode *nfsi = NFS_I(ino); 610 struct nfs_server *nfss = NFS_SERVER(ino); 611 612 if (pnfs_enabled_sb(nfss) && nfsi->layout) { 613 set_bit(NFS_LAYOUT_RETURN_REQUESTED, &nfsi->layout->plh_flags); 614 return _pnfs_return_layout(ino); 615 } 616 617 return 0; 618} 619 620static inline bool 621pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, 622 struct nfs_server *nfss) 623{ 624 return (dst && src && src->bm != 0 && nfss->pnfs_curr_ld && 625 nfss->pnfs_curr_ld->id == src->l_type); 626} 627 628static inline u64 629pnfs_calc_offset_end(u64 offset, u64 len) 630{ 631 if (len == NFS4_MAX_UINT64 || len >= NFS4_MAX_UINT64 - offset) 632 return NFS4_MAX_UINT64; 633 return offset + len - 1; 634} 635 636static inline u64 637pnfs_calc_offset_length(u64 offset, u64 end) 638{ 639 if (end == NFS4_MAX_UINT64 || end <= offset) 640 return NFS4_MAX_UINT64; 641 return 1 + end - offset; 642} 643 644static inline void 645pnfs_copy_range(struct pnfs_layout_range *dst, 646 const struct pnfs_layout_range *src) 647{ 648 memcpy(dst, src, sizeof(*dst)); 649} 650 651static inline u64 652pnfs_end_offset(u64 start, u64 len) 653{ 654 if (NFS4_MAX_UINT64 - start <= len) 655 return NFS4_MAX_UINT64; 656 return start + len; 657} 658 659/* 660 * Are 2 ranges intersecting? 661 * start1 end1 662 * [----------------------------------) 663 * start2 end2 664 * [----------------) 665 */ 666static inline bool 667pnfs_is_range_intersecting(u64 start1, u64 end1, u64 start2, u64 end2) 668{ 669 return (end1 == NFS4_MAX_UINT64 || start2 < end1) && 670 (end2 == NFS4_MAX_UINT64 || start1 < end2); 671} 672 673static inline bool 674pnfs_lseg_range_intersecting(const struct pnfs_layout_range *l1, 675 const struct pnfs_layout_range *l2) 676{ 677 u64 end1 = pnfs_end_offset(l1->offset, l1->length); 678 u64 end2 = pnfs_end_offset(l2->offset, l2->length); 679 680 return pnfs_is_range_intersecting(l1->offset, end1, l2->offset, end2); 681} 682 683static inline bool 684pnfs_lseg_request_intersecting(struct pnfs_layout_segment *lseg, struct nfs_page *req) 685{ 686 u64 seg_last = pnfs_end_offset(lseg->pls_range.offset, lseg->pls_range.length); 687 u64 req_last = req_offset(req) + req->wb_bytes; 688 689 return pnfs_is_range_intersecting(lseg->pls_range.offset, seg_last, 690 req_offset(req), req_last); 691} 692 693static inline void pnfs_lseg_cancel_io(struct nfs_server *server, 694 struct pnfs_layout_segment *lseg) 695{ 696 if (server->pnfs_curr_ld->cancel_io) 697 server->pnfs_curr_ld->cancel_io(lseg); 698} 699 700extern unsigned int layoutstats_timer; 701 702#ifdef NFS_DEBUG 703void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id); 704#else 705static inline void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id) 706{ 707} 708 709#endif /* NFS_DEBUG */ 710#else /* CONFIG_NFS_V4_1 */ 711 712static inline bool nfs_have_layout(struct inode *inode) 713{ 714 return false; 715} 716 717static inline void pnfs_destroy_all_layouts(struct nfs_client *clp) 718{ 719} 720 721static inline void pnfs_destroy_layout(struct nfs_inode *nfsi) 722{ 723} 724 725static inline void pnfs_destroy_layout_final(struct nfs_inode *nfsi) 726{ 727} 728 729static inline struct pnfs_layout_segment * 730pnfs_get_lseg(struct pnfs_layout_segment *lseg) 731{ 732 return NULL; 733} 734 735static inline void pnfs_put_lseg(struct pnfs_layout_segment *lseg) 736{ 737} 738 739static inline int pnfs_return_layout(struct inode *ino) 740{ 741 return 0; 742} 743 744static inline int pnfs_commit_and_return_layout(struct inode *inode) 745{ 746 return 0; 747} 748 749static inline bool 750pnfs_ld_layoutret_on_setattr(struct inode *inode) 751{ 752 return false; 753} 754 755static inline bool 756pnfs_ld_read_whole_page(struct inode *inode) 757{ 758 return false; 759} 760 761static inline int 762pnfs_sync_inode(struct inode *inode, bool datasync) 763{ 764 return 0; 765} 766 767static inline bool 768pnfs_layoutcommit_outstanding(struct inode *inode) 769{ 770 return false; 771} 772 773 774static inline bool 775pnfs_roc(struct inode *ino, 776 struct nfs4_layoutreturn_args *args, 777 struct nfs4_layoutreturn_res *res, 778 const struct cred *cred) 779{ 780 return false; 781} 782 783static inline int 784pnfs_roc_done(struct rpc_task *task, 785 struct nfs4_layoutreturn_args **argpp, 786 struct nfs4_layoutreturn_res **respp, 787 int *ret) 788{ 789 return 0; 790} 791 792static inline void 793pnfs_roc_release(struct nfs4_layoutreturn_args *args, 794 struct nfs4_layoutreturn_res *res, 795 int ret) 796{ 797} 798 799static inline bool 800pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task) 801{ 802 return false; 803} 804 805static inline void set_pnfs_layoutdriver(struct nfs_server *s, 806 const struct nfs_fh *mntfh, 807 struct nfs_fsinfo *fsinfo) 808{ 809} 810 811static inline void unset_pnfs_layoutdriver(struct nfs_server *s) 812{ 813} 814 815static inline int 816pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, 817 struct nfs_commit_info *cinfo) 818{ 819 return PNFS_NOT_ATTEMPTED; 820} 821 822static inline struct pnfs_ds_commit_info * 823pnfs_get_ds_info(struct inode *inode) 824{ 825 return NULL; 826} 827 828static inline void 829pnfs_init_ds_commit_info_ops(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode) 830{ 831} 832 833static inline void 834pnfs_init_ds_commit_info(struct pnfs_ds_commit_info *fl_cinfo) 835{ 836} 837 838static inline void 839pnfs_release_ds_info(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode) 840{ 841} 842 843static inline bool 844pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, 845 struct nfs_commit_info *cinfo, u32 ds_commit_idx) 846{ 847 return false; 848} 849 850static inline bool 851pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) 852{ 853 return false; 854} 855 856static inline int 857pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, 858 int max) 859{ 860 return 0; 861} 862 863static inline void 864pnfs_recover_commit_reqs(struct list_head *head, struct nfs_commit_info *cinfo) 865{ 866} 867 868static inline struct nfs_page * 869pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo, 870 struct folio *folio) 871{ 872 return NULL; 873} 874 875static inline int pnfs_layoutcommit_inode(struct inode *inode, bool sync) 876{ 877 return 0; 878} 879 880static inline bool 881pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, 882 struct nfs_server *nfss) 883{ 884 return false; 885} 886 887static inline struct nfs4_threshold *pnfs_mdsthreshold_alloc(void) 888{ 889 return NULL; 890} 891 892static inline void nfs4_pnfs_v3_ds_connect_unload(void) 893{ 894} 895 896static inline bool nfs4_layout_refresh_old_stateid(nfs4_stateid *dst, 897 struct pnfs_layout_range *dst_range, 898 struct inode *inode) 899{ 900 return false; 901} 902 903static inline void pnfs_lgopen_prepare(struct nfs4_opendata *data, 904 struct nfs_open_context *ctx) 905{ 906} 907 908static inline void pnfs_parse_lgopen(struct inode *ino, 909 struct nfs4_layoutget *lgp, 910 struct nfs_open_context *ctx) 911{ 912} 913 914static inline void nfs4_lgopen_release(struct nfs4_layoutget *lgp) 915{ 916} 917 918static inline bool pnfs_layout_is_valid(const struct pnfs_layout_hdr *lo) 919{ 920 return false; 921} 922 923#endif /* CONFIG_NFS_V4_1 */ 924 925#if IS_ENABLED(CONFIG_NFS_V4_2) 926int pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags); 927#else 928static inline int 929pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags) 930{ 931 return 0; 932} 933#endif 934 935#endif /* FS_NFS_PNFS_H */ 936