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_opendata; 39 40enum { 41 NFS_LSEG_VALID = 0, /* cleared when lseg is recalled/returned */ 42 NFS_LSEG_ROC, /* roc bit received from server */ 43 NFS_LSEG_LAYOUTCOMMIT, /* layoutcommit bit set for layoutcommit */ 44 NFS_LSEG_LAYOUTRETURN, /* layoutreturn bit set for layoutreturn */ 45 NFS_LSEG_UNAVAILABLE, /* unavailable bit set for temporary problem */ 46}; 47 48/* Individual ip address */ 49struct nfs4_pnfs_ds_addr { 50 struct sockaddr_storage da_addr; 51 size_t da_addrlen; 52 struct list_head da_node; /* nfs4_pnfs_dev_hlist dev_dslist */ 53 char *da_remotestr; /* human readable addr+port */ 54}; 55 56struct nfs4_pnfs_ds { 57 struct list_head ds_node; /* nfs4_pnfs_dev_hlist dev_dslist */ 58 char *ds_remotestr; /* comma sep list of addrs */ 59 struct list_head ds_addrs; 60 struct nfs_client *ds_clp; 61 refcount_t ds_count; 62 unsigned long ds_state; 63#define NFS4DS_CONNECTING 0 /* ds is establishing connection */ 64}; 65 66struct pnfs_layout_segment { 67 struct list_head pls_list; 68 struct list_head pls_lc_list; 69 struct list_head pls_commits; 70 struct pnfs_layout_range pls_range; 71 refcount_t pls_refcount; 72 u32 pls_seq; 73 unsigned long pls_flags; 74 struct pnfs_layout_hdr *pls_layout; 75}; 76 77enum pnfs_try_status { 78 PNFS_ATTEMPTED = 0, 79 PNFS_NOT_ATTEMPTED = 1, 80 PNFS_TRY_AGAIN = 2, 81}; 82 83/* error codes for internal use */ 84#define NFS4ERR_RESET_TO_MDS 12001 85#define NFS4ERR_RESET_TO_PNFS 12002 86 87#ifdef CONFIG_NFS_V4_1 88 89#define LAYOUT_NFSV4_1_MODULE_PREFIX "nfs-layouttype4" 90 91/* 92 * Default data server connection timeout and retrans vaules. 93 * Set by module parameters dataserver_timeo and dataserver_retrans. 94 */ 95#define NFS4_DEF_DS_TIMEO 600 /* in tenths of a second */ 96#define NFS4_DEF_DS_RETRANS 5 97#define PNFS_DEVICE_RETRY_TIMEOUT (120*HZ) 98 99enum { 100 NFS_LAYOUT_RO_FAILED = 0, /* get ro layout failed stop trying */ 101 NFS_LAYOUT_RW_FAILED, /* get rw layout failed stop trying */ 102 NFS_LAYOUT_BULK_RECALL, /* bulk recall affecting layout */ 103 NFS_LAYOUT_RETURN, /* layoutreturn in progress */ 104 NFS_LAYOUT_RETURN_LOCK, /* Serialise layoutreturn */ 105 NFS_LAYOUT_RETURN_REQUESTED, /* Return this layout ASAP */ 106 NFS_LAYOUT_INVALID_STID, /* layout stateid id is invalid */ 107 NFS_LAYOUT_FIRST_LAYOUTGET, /* Serialize first layoutget */ 108 NFS_LAYOUT_INODE_FREEING, /* The inode is being freed */ 109 NFS_LAYOUT_HASHED, /* The layout visible */ 110 NFS_LAYOUT_DRAIN, 111}; 112 113enum layoutdriver_policy_flags { 114 /* Should the pNFS client commit and return the layout upon truncate to 115 * a smaller size */ 116 PNFS_LAYOUTRET_ON_SETATTR = 1 << 0, 117 PNFS_LAYOUTRET_ON_ERROR = 1 << 1, 118 PNFS_READ_WHOLE_PAGE = 1 << 2, 119 PNFS_LAYOUTGET_ON_OPEN = 1 << 3, 120}; 121 122struct nfs4_deviceid_node; 123 124/* Per-layout driver specific registration structure */ 125struct pnfs_layoutdriver_type { 126 struct list_head pnfs_tblid; 127 const u32 id; 128 const char *name; 129 struct module *owner; 130 unsigned flags; 131 unsigned max_deviceinfo_size; 132 unsigned max_layoutget_response; 133 134 int (*set_layoutdriver) (struct nfs_server *, const struct nfs_fh *); 135 int (*clear_layoutdriver) (struct nfs_server *); 136 137 struct pnfs_layout_hdr * (*alloc_layout_hdr) (struct inode *inode, gfp_t gfp_flags); 138 void (*free_layout_hdr) (struct pnfs_layout_hdr *); 139 140 struct pnfs_layout_segment * (*alloc_lseg) (struct pnfs_layout_hdr *layoutid, struct nfs4_layoutget_res *lgr, gfp_t gfp_flags); 141 void (*free_lseg) (struct pnfs_layout_segment *lseg); 142 void (*add_lseg) (struct pnfs_layout_hdr *layoutid, 143 struct pnfs_layout_segment *lseg, 144 struct list_head *free_me); 145 146 void (*return_range) (struct pnfs_layout_hdr *lo, 147 struct pnfs_layout_range *range); 148 149 /* test for nfs page cache coalescing */ 150 const struct nfs_pageio_ops *pg_read_ops; 151 const struct nfs_pageio_ops *pg_write_ops; 152 153 struct pnfs_ds_commit_info *(*get_ds_info) (struct inode *inode); 154 155 int (*sync)(struct inode *inode, bool datasync); 156 157 /* 158 * Return PNFS_ATTEMPTED to indicate the layout code has attempted 159 * I/O, else return PNFS_NOT_ATTEMPTED to fall back to normal NFS 160 */ 161 enum pnfs_try_status (*read_pagelist)(struct nfs_pgio_header *); 162 enum pnfs_try_status (*write_pagelist)(struct nfs_pgio_header *, int); 163 164 void (*free_deviceid_node) (struct nfs4_deviceid_node *); 165 struct nfs4_deviceid_node * (*alloc_deviceid_node) 166 (struct nfs_server *server, struct pnfs_device *pdev, 167 gfp_t gfp_flags); 168 169 int (*prepare_layoutreturn) (struct nfs4_layoutreturn_args *); 170 171 void (*cleanup_layoutcommit) (struct nfs4_layoutcommit_data *data); 172 int (*prepare_layoutcommit) (struct nfs4_layoutcommit_args *args); 173 int (*prepare_layoutstats) (struct nfs42_layoutstat_args *args); 174}; 175 176struct pnfs_commit_ops { 177 void (*setup_ds_info)(struct pnfs_ds_commit_info *, 178 struct pnfs_layout_segment *); 179 void (*release_ds_info)(struct pnfs_ds_commit_info *, 180 struct inode *inode); 181 int (*commit_pagelist)(struct inode *inode, 182 struct list_head *mds_pages, 183 int how, 184 struct nfs_commit_info *cinfo); 185 void (*mark_request_commit) (struct nfs_page *req, 186 struct pnfs_layout_segment *lseg, 187 struct nfs_commit_info *cinfo, 188 u32 ds_commit_idx); 189 void (*clear_request_commit) (struct nfs_page *req, 190 struct nfs_commit_info *cinfo); 191 int (*scan_commit_lists) (struct nfs_commit_info *cinfo, 192 int max); 193 void (*recover_commit_reqs) (struct list_head *list, 194 struct nfs_commit_info *cinfo); 195 struct nfs_page * (*search_commit_reqs)(struct nfs_commit_info *cinfo, 196 struct page *page); 197}; 198 199struct pnfs_layout_hdr { 200 refcount_t plh_refcount; 201 atomic_t plh_outstanding; /* number of RPCs out */ 202 struct list_head plh_layouts; /* other client layouts */ 203 struct list_head plh_bulk_destroy; 204 struct list_head plh_segs; /* layout segments list */ 205 struct list_head plh_return_segs; /* invalid layout segments */ 206 unsigned long plh_block_lgets; /* block LAYOUTGET if >0 */ 207 unsigned long plh_retry_timestamp; 208 unsigned long plh_flags; 209 nfs4_stateid plh_stateid; 210 u32 plh_barrier; /* ignore lower seqids */ 211 u32 plh_return_seq; 212 enum pnfs_iomode plh_return_iomode; 213 loff_t plh_lwb; /* last write byte for layoutcommit */ 214 const struct cred *plh_lc_cred; /* layoutcommit cred */ 215 struct inode *plh_inode; 216 struct rcu_head plh_rcu; 217}; 218 219struct pnfs_device { 220 struct nfs4_deviceid dev_id; 221 unsigned int layout_type; 222 unsigned int mincount; 223 unsigned int maxcount; /* gdia_maxcount */ 224 struct page **pages; 225 unsigned int pgbase; 226 unsigned int pglen; /* reply buffer length */ 227 unsigned char nocache : 1;/* May not be cached */ 228}; 229 230#define NFS4_PNFS_GETDEVLIST_MAXNUM 16 231 232struct pnfs_devicelist { 233 unsigned int eof; 234 unsigned int num_devs; 235 struct nfs4_deviceid dev_id[NFS4_PNFS_GETDEVLIST_MAXNUM]; 236}; 237 238extern int pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *); 239extern void pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *); 240extern const struct pnfs_layoutdriver_type *pnfs_find_layoutdriver(u32 id); 241extern void pnfs_put_layoutdriver(const struct pnfs_layoutdriver_type *ld); 242 243/* nfs4proc.c */ 244extern size_t max_response_pages(struct nfs_server *server); 245extern int nfs4_proc_getdeviceinfo(struct nfs_server *server, 246 struct pnfs_device *dev, 247 const struct cred *cred); 248extern struct pnfs_layout_segment* nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout); 249extern int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync); 250 251/* pnfs.c */ 252void pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo); 253void pnfs_put_lseg(struct pnfs_layout_segment *lseg); 254 255void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, struct nfs_fsinfo *); 256void unset_pnfs_layoutdriver(struct nfs_server *); 257void pnfs_generic_pg_check_layout(struct nfs_pageio_descriptor *pgio); 258void pnfs_generic_pg_check_range(struct nfs_pageio_descriptor *pgio, struct nfs_page *req); 259void pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *, struct nfs_page *); 260int pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc); 261void pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio, 262 struct nfs_page *req, u64 wb_size); 263void pnfs_generic_pg_cleanup(struct nfs_pageio_descriptor *); 264int pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc); 265size_t pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, 266 struct nfs_page *prev, struct nfs_page *req); 267void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg); 268struct pnfs_layout_segment *pnfs_layout_process(struct nfs4_layoutget *lgp); 269void pnfs_layoutget_free(struct nfs4_layoutget *lgp); 270void pnfs_free_lseg_list(struct list_head *tmp_list); 271void pnfs_destroy_layout(struct nfs_inode *); 272void pnfs_destroy_layout_final(struct nfs_inode *); 273void pnfs_destroy_all_layouts(struct nfs_client *); 274int pnfs_destroy_layouts_byfsid(struct nfs_client *clp, 275 struct nfs_fsid *fsid, 276 bool is_recall); 277int pnfs_destroy_layouts_byclid(struct nfs_client *clp, 278 bool is_recall); 279bool nfs4_layout_refresh_old_stateid(nfs4_stateid *dst, 280 struct pnfs_layout_range *dst_range, 281 struct inode *inode); 282void pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo); 283void pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, 284 const nfs4_stateid *new, 285 const struct cred *cred, 286 bool update_barrier); 287int pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, 288 struct list_head *tmp_list, 289 const struct pnfs_layout_range *recall_range, 290 u32 seq); 291int pnfs_mark_matching_lsegs_return(struct pnfs_layout_hdr *lo, 292 struct list_head *tmp_list, 293 const struct pnfs_layout_range *recall_range, 294 u32 seq); 295int pnfs_mark_layout_stateid_invalid(struct pnfs_layout_hdr *lo, 296 struct list_head *lseg_list); 297bool pnfs_roc(struct inode *ino, 298 struct nfs4_layoutreturn_args *args, 299 struct nfs4_layoutreturn_res *res, 300 const struct cred *cred); 301int pnfs_roc_done(struct rpc_task *task, struct nfs4_layoutreturn_args **argpp, 302 struct nfs4_layoutreturn_res **respp, int *ret); 303void pnfs_roc_release(struct nfs4_layoutreturn_args *args, 304 struct nfs4_layoutreturn_res *res, 305 int ret); 306bool pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task); 307void pnfs_set_layoutcommit(struct inode *, struct pnfs_layout_segment *, loff_t); 308void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data); 309int pnfs_layoutcommit_inode(struct inode *inode, bool sync); 310int pnfs_generic_sync(struct inode *inode, bool datasync); 311int pnfs_nfs_generic_sync(struct inode *inode, bool datasync); 312int _pnfs_return_layout(struct inode *); 313int pnfs_commit_and_return_layout(struct inode *); 314void pnfs_ld_write_done(struct nfs_pgio_header *); 315void pnfs_ld_read_done(struct nfs_pgio_header *); 316void pnfs_read_resend_pnfs(struct nfs_pgio_header *, unsigned int mirror_idx); 317struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino, 318 struct nfs_open_context *ctx, 319 loff_t pos, 320 u64 count, 321 enum pnfs_iomode iomode, 322 bool strict_iomode, 323 gfp_t gfp_flags); 324void pnfs_layoutreturn_free_lsegs(struct pnfs_layout_hdr *lo, 325 const nfs4_stateid *arg_stateid, 326 const struct pnfs_layout_range *range, 327 const nfs4_stateid *stateid); 328 329void pnfs_generic_layout_insert_lseg(struct pnfs_layout_hdr *lo, 330 struct pnfs_layout_segment *lseg, 331 bool (*is_after)(const struct pnfs_layout_range *lseg_range, 332 const struct pnfs_layout_range *old), 333 bool (*do_merge)(struct pnfs_layout_segment *lseg, 334 struct pnfs_layout_segment *old), 335 struct list_head *free_me); 336 337void nfs4_deviceid_mark_client_invalid(struct nfs_client *clp); 338int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *); 339int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *); 340struct nfs4_threshold *pnfs_mdsthreshold_alloc(void); 341void pnfs_error_mark_layout_for_return(struct inode *inode, 342 struct pnfs_layout_segment *lseg); 343void pnfs_layout_return_unused_byclid(struct nfs_client *clp, 344 enum pnfs_iomode iomode); 345 346/* nfs4_deviceid_flags */ 347enum { 348 NFS_DEVICEID_INVALID = 0, /* set when MDS clientid recalled */ 349 NFS_DEVICEID_UNAVAILABLE, /* device temporarily unavailable */ 350 NFS_DEVICEID_NOCACHE, /* device may not be cached */ 351}; 352 353/* pnfs_dev.c */ 354struct nfs4_deviceid_node { 355 struct hlist_node node; 356 struct hlist_node tmpnode; 357 const struct pnfs_layoutdriver_type *ld; 358 const struct nfs_client *nfs_client; 359 unsigned long flags; 360 unsigned long timestamp_unavailable; 361 struct nfs4_deviceid deviceid; 362 struct rcu_head rcu; 363 atomic_t ref; 364}; 365 366struct nfs4_deviceid_node * 367nfs4_find_get_deviceid(struct nfs_server *server, 368 const struct nfs4_deviceid *id, const struct cred *cred, 369 gfp_t gfp_mask); 370void nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *); 371void nfs4_init_deviceid_node(struct nfs4_deviceid_node *, struct nfs_server *, 372 const struct nfs4_deviceid *); 373bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *); 374void nfs4_mark_deviceid_available(struct nfs4_deviceid_node *node); 375void nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node); 376bool nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node); 377void nfs4_deviceid_purge_client(const struct nfs_client *); 378 379/* pnfs_nfs.c */ 380struct pnfs_commit_array *pnfs_alloc_commit_array(size_t n, gfp_t gfp_flags); 381void pnfs_free_commit_array(struct pnfs_commit_array *p); 382struct pnfs_commit_array *pnfs_add_commit_array(struct pnfs_ds_commit_info *, 383 struct pnfs_commit_array *, 384 struct pnfs_layout_segment *); 385 386void pnfs_generic_ds_cinfo_release_lseg(struct pnfs_ds_commit_info *fl_cinfo, 387 struct pnfs_layout_segment *lseg); 388void pnfs_generic_ds_cinfo_destroy(struct pnfs_ds_commit_info *fl_cinfo); 389 390void pnfs_generic_clear_request_commit(struct nfs_page *req, 391 struct nfs_commit_info *cinfo); 392void pnfs_generic_commit_release(void *calldata); 393void pnfs_generic_prepare_to_resend_writes(struct nfs_commit_data *data); 394void pnfs_generic_rw_release(void *data); 395void pnfs_generic_recover_commit_reqs(struct list_head *dst, 396 struct nfs_commit_info *cinfo); 397struct nfs_page *pnfs_generic_search_commit_reqs(struct nfs_commit_info *cinfo, 398 struct page *page); 399int pnfs_generic_commit_pagelist(struct inode *inode, 400 struct list_head *mds_pages, 401 int how, 402 struct nfs_commit_info *cinfo, 403 int (*initiate_commit)(struct nfs_commit_data *data, 404 int how)); 405int pnfs_generic_scan_commit_lists(struct nfs_commit_info *cinfo, int max); 406void pnfs_generic_write_commit_done(struct rpc_task *task, void *data); 407void nfs4_pnfs_ds_put(struct nfs4_pnfs_ds *ds); 408struct nfs4_pnfs_ds *nfs4_pnfs_ds_add(struct list_head *dsaddrs, 409 gfp_t gfp_flags); 410void nfs4_pnfs_v3_ds_connect_unload(void); 411int nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds, 412 struct nfs4_deviceid_node *devid, unsigned int timeo, 413 unsigned int retrans, u32 version, u32 minor_version); 414struct nfs4_pnfs_ds_addr *nfs4_decode_mp_ds_addr(struct net *net, 415 struct xdr_stream *xdr, 416 gfp_t gfp_flags); 417void pnfs_layout_mark_request_commit(struct nfs_page *req, 418 struct pnfs_layout_segment *lseg, 419 struct nfs_commit_info *cinfo, 420 u32 ds_commit_idx); 421void pnfs_lgopen_prepare(struct nfs4_opendata *data, 422 struct nfs_open_context *ctx); 423void pnfs_parse_lgopen(struct inode *ino, struct nfs4_layoutget *lgp, 424 struct nfs_open_context *ctx); 425void nfs4_lgopen_release(struct nfs4_layoutget *lgp); 426 427static inline bool nfs_have_layout(struct inode *inode) 428{ 429 return NFS_I(inode)->layout != NULL; 430} 431 432static inline bool pnfs_layout_is_valid(const struct pnfs_layout_hdr *lo) 433{ 434 return test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) == 0; 435} 436 437static inline struct nfs4_deviceid_node * 438nfs4_get_deviceid(struct nfs4_deviceid_node *d) 439{ 440 atomic_inc(&d->ref); 441 return d; 442} 443 444static inline struct pnfs_layout_segment * 445pnfs_get_lseg(struct pnfs_layout_segment *lseg) 446{ 447 if (lseg) { 448 refcount_inc(&lseg->pls_refcount); 449 smp_mb__after_atomic(); 450 } 451 return lseg; 452} 453 454static inline bool 455pnfs_is_valid_lseg(struct pnfs_layout_segment *lseg) 456{ 457 return test_bit(NFS_LSEG_VALID, &lseg->pls_flags) != 0; 458} 459 460/* Return true if a layout driver is being used for this mountpoint */ 461static inline int pnfs_enabled_sb(struct nfs_server *nfss) 462{ 463 return nfss->pnfs_curr_ld != NULL; 464} 465 466static inline int 467pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, 468 struct nfs_commit_info *cinfo) 469{ 470 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 471 472 if (fl_cinfo == NULL || fl_cinfo->ncommitting == 0) 473 return PNFS_NOT_ATTEMPTED; 474 return fl_cinfo->ops->commit_pagelist(inode, mds_pages, how, cinfo); 475} 476 477static inline struct pnfs_ds_commit_info * 478pnfs_get_ds_info(struct inode *inode) 479{ 480 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; 481 482 if (ld == NULL || ld->get_ds_info == NULL) 483 return NULL; 484 return ld->get_ds_info(inode); 485} 486 487static inline void 488pnfs_init_ds_commit_info_ops(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode) 489{ 490 struct pnfs_ds_commit_info *inode_cinfo = pnfs_get_ds_info(inode); 491 if (inode_cinfo != NULL) 492 fl_cinfo->ops = inode_cinfo->ops; 493} 494 495static inline void 496pnfs_init_ds_commit_info(struct pnfs_ds_commit_info *fl_cinfo) 497{ 498 INIT_LIST_HEAD(&fl_cinfo->commits); 499 fl_cinfo->ops = NULL; 500} 501 502static inline void 503pnfs_release_ds_info(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode) 504{ 505 if (fl_cinfo->ops != NULL && fl_cinfo->ops->release_ds_info != NULL) 506 fl_cinfo->ops->release_ds_info(fl_cinfo, inode); 507} 508 509static inline void 510pnfs_generic_mark_devid_invalid(struct nfs4_deviceid_node *node) 511{ 512 set_bit(NFS_DEVICEID_INVALID, &node->flags); 513} 514 515static inline bool 516pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, 517 struct nfs_commit_info *cinfo, u32 ds_commit_idx) 518{ 519 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 520 521 if (!lseg || !fl_cinfo->ops || !fl_cinfo->ops->mark_request_commit) 522 return false; 523 fl_cinfo->ops->mark_request_commit(req, lseg, cinfo, ds_commit_idx); 524 return true; 525} 526 527static inline bool 528pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) 529{ 530 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 531 532 if (!fl_cinfo || !fl_cinfo->ops || !fl_cinfo->ops->clear_request_commit) 533 return false; 534 fl_cinfo->ops->clear_request_commit(req, cinfo); 535 return true; 536} 537 538static inline int 539pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, 540 int max) 541{ 542 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 543 544 if (!fl_cinfo || fl_cinfo->nwritten == 0) 545 return 0; 546 return fl_cinfo->ops->scan_commit_lists(cinfo, max); 547} 548 549static inline void 550pnfs_recover_commit_reqs(struct list_head *head, struct nfs_commit_info *cinfo) 551{ 552 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 553 554 if (fl_cinfo && fl_cinfo->nwritten != 0) 555 fl_cinfo->ops->recover_commit_reqs(head, cinfo); 556} 557 558static inline struct nfs_page * 559pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo, 560 struct page *page) 561{ 562 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 563 564 if (!fl_cinfo->ops || !fl_cinfo->ops->search_commit_reqs) 565 return NULL; 566 return fl_cinfo->ops->search_commit_reqs(cinfo, page); 567} 568 569/* Should the pNFS client commit and return the layout upon a setattr */ 570static inline bool 571pnfs_ld_layoutret_on_setattr(struct inode *inode) 572{ 573 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 574 return false; 575 return NFS_SERVER(inode)->pnfs_curr_ld->flags & 576 PNFS_LAYOUTRET_ON_SETATTR; 577} 578 579static inline bool 580pnfs_ld_read_whole_page(struct inode *inode) 581{ 582 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 583 return false; 584 return NFS_SERVER(inode)->pnfs_curr_ld->flags & PNFS_READ_WHOLE_PAGE; 585} 586 587static inline int 588pnfs_sync_inode(struct inode *inode, bool datasync) 589{ 590 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 591 return 0; 592 return NFS_SERVER(inode)->pnfs_curr_ld->sync(inode, datasync); 593} 594 595static inline bool 596pnfs_layoutcommit_outstanding(struct inode *inode) 597{ 598 struct nfs_inode *nfsi = NFS_I(inode); 599 600 return test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags) != 0 || 601 test_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags) != 0; 602} 603 604static inline int pnfs_return_layout(struct inode *ino) 605{ 606 struct nfs_inode *nfsi = NFS_I(ino); 607 struct nfs_server *nfss = NFS_SERVER(ino); 608 609 if (pnfs_enabled_sb(nfss) && nfsi->layout) { 610 set_bit(NFS_LAYOUT_RETURN_REQUESTED, &nfsi->layout->plh_flags); 611 return _pnfs_return_layout(ino); 612 } 613 614 return 0; 615} 616 617static inline bool 618pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, 619 struct nfs_server *nfss) 620{ 621 return (dst && src && src->bm != 0 && nfss->pnfs_curr_ld && 622 nfss->pnfs_curr_ld->id == src->l_type); 623} 624 625static inline u64 626pnfs_calc_offset_end(u64 offset, u64 len) 627{ 628 if (len == NFS4_MAX_UINT64 || len >= NFS4_MAX_UINT64 - offset) 629 return NFS4_MAX_UINT64; 630 return offset + len - 1; 631} 632 633static inline u64 634pnfs_calc_offset_length(u64 offset, u64 end) 635{ 636 if (end == NFS4_MAX_UINT64 || end <= offset) 637 return NFS4_MAX_UINT64; 638 return 1 + end - offset; 639} 640 641static inline void 642pnfs_copy_range(struct pnfs_layout_range *dst, 643 const struct pnfs_layout_range *src) 644{ 645 memcpy(dst, src, sizeof(*dst)); 646} 647 648static inline u64 649pnfs_end_offset(u64 start, u64 len) 650{ 651 if (NFS4_MAX_UINT64 - start <= len) 652 return NFS4_MAX_UINT64; 653 return start + len; 654} 655 656/* 657 * Are 2 ranges intersecting? 658 * start1 end1 659 * [----------------------------------) 660 * start2 end2 661 * [----------------) 662 */ 663static inline bool 664pnfs_is_range_intersecting(u64 start1, u64 end1, u64 start2, u64 end2) 665{ 666 return (end1 == NFS4_MAX_UINT64 || start2 < end1) && 667 (end2 == NFS4_MAX_UINT64 || start1 < end2); 668} 669 670static inline bool 671pnfs_lseg_range_intersecting(const struct pnfs_layout_range *l1, 672 const struct pnfs_layout_range *l2) 673{ 674 u64 end1 = pnfs_end_offset(l1->offset, l1->length); 675 u64 end2 = pnfs_end_offset(l2->offset, l2->length); 676 677 return pnfs_is_range_intersecting(l1->offset, end1, l2->offset, end2); 678} 679 680static inline bool 681pnfs_lseg_request_intersecting(struct pnfs_layout_segment *lseg, struct nfs_page *req) 682{ 683 u64 seg_last = pnfs_end_offset(lseg->pls_range.offset, lseg->pls_range.length); 684 u64 req_last = req_offset(req) + req->wb_bytes; 685 686 return pnfs_is_range_intersecting(lseg->pls_range.offset, seg_last, 687 req_offset(req), req_last); 688} 689 690extern unsigned int layoutstats_timer; 691 692#ifdef NFS_DEBUG 693void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id); 694#else 695static inline void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id) 696{ 697} 698 699#endif /* NFS_DEBUG */ 700#else /* CONFIG_NFS_V4_1 */ 701 702static inline bool nfs_have_layout(struct inode *inode) 703{ 704 return false; 705} 706 707static inline void pnfs_destroy_all_layouts(struct nfs_client *clp) 708{ 709} 710 711static inline void pnfs_destroy_layout(struct nfs_inode *nfsi) 712{ 713} 714 715static inline void pnfs_destroy_layout_final(struct nfs_inode *nfsi) 716{ 717} 718 719static inline struct pnfs_layout_segment * 720pnfs_get_lseg(struct pnfs_layout_segment *lseg) 721{ 722 return NULL; 723} 724 725static inline void pnfs_put_lseg(struct pnfs_layout_segment *lseg) 726{ 727} 728 729static inline int pnfs_return_layout(struct inode *ino) 730{ 731 return 0; 732} 733 734static inline int pnfs_commit_and_return_layout(struct inode *inode) 735{ 736 return 0; 737} 738 739static inline bool 740pnfs_ld_layoutret_on_setattr(struct inode *inode) 741{ 742 return false; 743} 744 745static inline bool 746pnfs_ld_read_whole_page(struct inode *inode) 747{ 748 return false; 749} 750 751static inline int 752pnfs_sync_inode(struct inode *inode, bool datasync) 753{ 754 return 0; 755} 756 757static inline bool 758pnfs_layoutcommit_outstanding(struct inode *inode) 759{ 760 return false; 761} 762 763 764static inline bool 765pnfs_roc(struct inode *ino, 766 struct nfs4_layoutreturn_args *args, 767 struct nfs4_layoutreturn_res *res, 768 const struct cred *cred) 769{ 770 return false; 771} 772 773static inline int 774pnfs_roc_done(struct rpc_task *task, 775 struct nfs4_layoutreturn_args **argpp, 776 struct nfs4_layoutreturn_res **respp, 777 int *ret) 778{ 779 return 0; 780} 781 782static inline void 783pnfs_roc_release(struct nfs4_layoutreturn_args *args, 784 struct nfs4_layoutreturn_res *res, 785 int ret) 786{ 787} 788 789static inline bool 790pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task) 791{ 792 return false; 793} 794 795static inline void set_pnfs_layoutdriver(struct nfs_server *s, 796 const struct nfs_fh *mntfh, 797 struct nfs_fsinfo *fsinfo) 798{ 799} 800 801static inline void unset_pnfs_layoutdriver(struct nfs_server *s) 802{ 803} 804 805static inline int 806pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, 807 struct nfs_commit_info *cinfo) 808{ 809 return PNFS_NOT_ATTEMPTED; 810} 811 812static inline struct pnfs_ds_commit_info * 813pnfs_get_ds_info(struct inode *inode) 814{ 815 return NULL; 816} 817 818static inline void 819pnfs_init_ds_commit_info_ops(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode) 820{ 821} 822 823static inline void 824pnfs_init_ds_commit_info(struct pnfs_ds_commit_info *fl_cinfo) 825{ 826} 827 828static inline void 829pnfs_release_ds_info(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode) 830{ 831} 832 833static inline bool 834pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, 835 struct nfs_commit_info *cinfo, u32 ds_commit_idx) 836{ 837 return false; 838} 839 840static inline bool 841pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) 842{ 843 return false; 844} 845 846static inline int 847pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, 848 int max) 849{ 850 return 0; 851} 852 853static inline void 854pnfs_recover_commit_reqs(struct list_head *head, struct nfs_commit_info *cinfo) 855{ 856} 857 858static inline struct nfs_page * 859pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo, 860 struct page *page) 861{ 862 return NULL; 863} 864 865static inline int pnfs_layoutcommit_inode(struct inode *inode, bool sync) 866{ 867 return 0; 868} 869 870static inline bool 871pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, 872 struct nfs_server *nfss) 873{ 874 return false; 875} 876 877static inline struct nfs4_threshold *pnfs_mdsthreshold_alloc(void) 878{ 879 return NULL; 880} 881 882static inline void nfs4_pnfs_v3_ds_connect_unload(void) 883{ 884} 885 886static inline bool nfs4_layout_refresh_old_stateid(nfs4_stateid *dst, 887 struct pnfs_layout_range *dst_range, 888 struct inode *inode) 889{ 890 return false; 891} 892 893static inline void pnfs_lgopen_prepare(struct nfs4_opendata *data, 894 struct nfs_open_context *ctx) 895{ 896} 897 898static inline void pnfs_parse_lgopen(struct inode *ino, 899 struct nfs4_layoutget *lgp, 900 struct nfs_open_context *ctx) 901{ 902} 903 904static inline void nfs4_lgopen_release(struct nfs4_layoutget *lgp) 905{ 906} 907 908static inline bool pnfs_layout_is_valid(const struct pnfs_layout_hdr *lo) 909{ 910 return false; 911} 912 913#endif /* CONFIG_NFS_V4_1 */ 914 915#if IS_ENABLED(CONFIG_NFS_V4_2) 916int pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags); 917#else 918static inline int 919pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags) 920{ 921 return 0; 922} 923#endif 924 925#endif /* FS_NFS_PNFS_H */ 926