rjw | 1f88458 | 2022-01-06 17:20:42 +0800 | [diff] [blame^] | 1 | /* |
| 2 | * pNFS client data structures. |
| 3 | * |
| 4 | * Copyright (c) 2002 |
| 5 | * The Regents of the University of Michigan |
| 6 | * All Rights Reserved |
| 7 | * |
| 8 | * Dean Hildebrand <dhildebz@umich.edu> |
| 9 | * |
| 10 | * Permission is granted to use, copy, create derivative works, and |
| 11 | * redistribute this software and such derivative works for any purpose, |
| 12 | * so long as the name of the University of Michigan is not used in |
| 13 | * any advertising or publicity pertaining to the use or distribution |
| 14 | * of this software without specific, written prior authorization. If |
| 15 | * the above copyright notice or any other identification of the |
| 16 | * University of Michigan is included in any copy of any portion of |
| 17 | * this software, then the disclaimer below must also be included. |
| 18 | * |
| 19 | * This software is provided as is, without representation or warranty |
| 20 | * of any kind either express or implied, including without limitation |
| 21 | * the implied warranties of merchantability, fitness for a particular |
| 22 | * purpose, or noninfringement. The Regents of the University of |
| 23 | * Michigan shall not be liable for any damages, including special, |
| 24 | * indirect, incidental, or consequential damages, with respect to any |
| 25 | * claim arising out of or in connection with the use of the software, |
| 26 | * even if it has been or is hereafter advised of the possibility of |
| 27 | * such damages. |
| 28 | */ |
| 29 | |
| 30 | #ifndef FS_NFS_PNFS_H |
| 31 | #define FS_NFS_PNFS_H |
| 32 | |
| 33 | #include <linux/nfs_fs.h> |
| 34 | #include <linux/nfs_page.h> |
| 35 | #include <linux/workqueue.h> |
| 36 | |
| 37 | enum { |
| 38 | NFS_LSEG_VALID = 0, /* cleared when lseg is recalled/returned */ |
| 39 | NFS_LSEG_ROC, /* roc bit received from server */ |
| 40 | NFS_LSEG_LAYOUTCOMMIT, /* layoutcommit bit set for layoutcommit */ |
| 41 | NFS_LSEG_LAYOUTRETURN, /* layoutreturn bit set for layoutreturn */ |
| 42 | }; |
| 43 | |
| 44 | /* Individual ip address */ |
| 45 | struct nfs4_pnfs_ds_addr { |
| 46 | struct sockaddr_storage da_addr; |
| 47 | size_t da_addrlen; |
| 48 | struct list_head da_node; /* nfs4_pnfs_dev_hlist dev_dslist */ |
| 49 | char *da_remotestr; /* human readable addr+port */ |
| 50 | }; |
| 51 | |
| 52 | struct nfs4_pnfs_ds { |
| 53 | struct list_head ds_node; /* nfs4_pnfs_dev_hlist dev_dslist */ |
| 54 | char *ds_remotestr; /* comma sep list of addrs */ |
| 55 | struct list_head ds_addrs; |
| 56 | struct nfs_client *ds_clp; |
| 57 | atomic_t ds_count; |
| 58 | unsigned long ds_state; |
| 59 | #define NFS4DS_CONNECTING 0 /* ds is establishing connection */ |
| 60 | }; |
| 61 | |
| 62 | struct pnfs_layout_segment { |
| 63 | struct list_head pls_list; |
| 64 | struct list_head pls_lc_list; |
| 65 | struct pnfs_layout_range pls_range; |
| 66 | atomic_t pls_refcount; |
| 67 | u32 pls_seq; |
| 68 | unsigned long pls_flags; |
| 69 | struct pnfs_layout_hdr *pls_layout; |
| 70 | }; |
| 71 | |
| 72 | enum pnfs_try_status { |
| 73 | PNFS_ATTEMPTED = 0, |
| 74 | PNFS_NOT_ATTEMPTED = 1, |
| 75 | PNFS_TRY_AGAIN = 2, |
| 76 | }; |
| 77 | |
| 78 | #ifdef CONFIG_NFS_V4_1 |
| 79 | |
| 80 | #define LAYOUT_NFSV4_1_MODULE_PREFIX "nfs-layouttype4" |
| 81 | |
| 82 | /* |
| 83 | * Default data server connection timeout and retrans vaules. |
| 84 | * Set by module parameters dataserver_timeo and dataserver_retrans. |
| 85 | */ |
| 86 | #define NFS4_DEF_DS_TIMEO 600 /* in tenths of a second */ |
| 87 | #define NFS4_DEF_DS_RETRANS 5 |
| 88 | |
| 89 | /* error codes for internal use */ |
| 90 | #define NFS4ERR_RESET_TO_MDS 12001 |
| 91 | #define NFS4ERR_RESET_TO_PNFS 12002 |
| 92 | |
| 93 | enum { |
| 94 | NFS_LAYOUT_RO_FAILED = 0, /* get ro layout failed stop trying */ |
| 95 | NFS_LAYOUT_RW_FAILED, /* get rw layout failed stop trying */ |
| 96 | NFS_LAYOUT_BULK_RECALL, /* bulk recall affecting layout */ |
| 97 | NFS_LAYOUT_RETURN, /* layoutreturn in progress */ |
| 98 | NFS_LAYOUT_RETURN_LOCK, /* Serialise layoutreturn */ |
| 99 | NFS_LAYOUT_RETURN_REQUESTED, /* Return this layout ASAP */ |
| 100 | NFS_LAYOUT_INVALID_STID, /* layout stateid id is invalid */ |
| 101 | NFS_LAYOUT_FIRST_LAYOUTGET, /* Serialize first layoutget */ |
| 102 | NFS_LAYOUT_INODE_FREEING, /* The inode is being freed */ |
| 103 | }; |
| 104 | |
| 105 | enum layoutdriver_policy_flags { |
| 106 | /* Should the pNFS client commit and return the layout upon truncate to |
| 107 | * a smaller size */ |
| 108 | PNFS_LAYOUTRET_ON_SETATTR = 1 << 0, |
| 109 | PNFS_LAYOUTRET_ON_ERROR = 1 << 1, |
| 110 | PNFS_READ_WHOLE_PAGE = 1 << 2, |
| 111 | }; |
| 112 | |
| 113 | struct nfs4_deviceid_node; |
| 114 | |
| 115 | /* Per-layout driver specific registration structure */ |
| 116 | struct pnfs_layoutdriver_type { |
| 117 | struct list_head pnfs_tblid; |
| 118 | const u32 id; |
| 119 | const char *name; |
| 120 | struct module *owner; |
| 121 | unsigned flags; |
| 122 | unsigned max_deviceinfo_size; |
| 123 | |
| 124 | int (*set_layoutdriver) (struct nfs_server *, const struct nfs_fh *); |
| 125 | int (*clear_layoutdriver) (struct nfs_server *); |
| 126 | |
| 127 | struct pnfs_layout_hdr * (*alloc_layout_hdr) (struct inode *inode, gfp_t gfp_flags); |
| 128 | void (*free_layout_hdr) (struct pnfs_layout_hdr *); |
| 129 | |
| 130 | struct pnfs_layout_segment * (*alloc_lseg) (struct pnfs_layout_hdr *layoutid, struct nfs4_layoutget_res *lgr, gfp_t gfp_flags); |
| 131 | void (*free_lseg) (struct pnfs_layout_segment *lseg); |
| 132 | void (*add_lseg) (struct pnfs_layout_hdr *layoutid, |
| 133 | struct pnfs_layout_segment *lseg, |
| 134 | struct list_head *free_me); |
| 135 | |
| 136 | void (*return_range) (struct pnfs_layout_hdr *lo, |
| 137 | struct pnfs_layout_range *range); |
| 138 | |
| 139 | /* test for nfs page cache coalescing */ |
| 140 | const struct nfs_pageio_ops *pg_read_ops; |
| 141 | const struct nfs_pageio_ops *pg_write_ops; |
| 142 | |
| 143 | struct pnfs_ds_commit_info *(*get_ds_info) (struct inode *inode); |
| 144 | void (*mark_request_commit) (struct nfs_page *req, |
| 145 | struct pnfs_layout_segment *lseg, |
| 146 | struct nfs_commit_info *cinfo, |
| 147 | u32 ds_commit_idx); |
| 148 | void (*clear_request_commit) (struct nfs_page *req, |
| 149 | struct nfs_commit_info *cinfo); |
| 150 | int (*scan_commit_lists) (struct nfs_commit_info *cinfo, |
| 151 | int max); |
| 152 | void (*recover_commit_reqs) (struct list_head *list, |
| 153 | struct nfs_commit_info *cinfo); |
| 154 | struct nfs_page * (*search_commit_reqs)(struct nfs_commit_info *cinfo, |
| 155 | struct page *page); |
| 156 | int (*commit_pagelist)(struct inode *inode, |
| 157 | struct list_head *mds_pages, |
| 158 | int how, |
| 159 | struct nfs_commit_info *cinfo); |
| 160 | |
| 161 | int (*sync)(struct inode *inode, bool datasync); |
| 162 | |
| 163 | /* |
| 164 | * Return PNFS_ATTEMPTED to indicate the layout code has attempted |
| 165 | * I/O, else return PNFS_NOT_ATTEMPTED to fall back to normal NFS |
| 166 | */ |
| 167 | enum pnfs_try_status (*read_pagelist)(struct nfs_pgio_header *); |
| 168 | enum pnfs_try_status (*write_pagelist)(struct nfs_pgio_header *, int); |
| 169 | |
| 170 | void (*free_deviceid_node) (struct nfs4_deviceid_node *); |
| 171 | struct nfs4_deviceid_node * (*alloc_deviceid_node) |
| 172 | (struct nfs_server *server, struct pnfs_device *pdev, |
| 173 | gfp_t gfp_flags); |
| 174 | |
| 175 | int (*prepare_layoutreturn) (struct nfs4_layoutreturn_args *); |
| 176 | |
| 177 | void (*cleanup_layoutcommit) (struct nfs4_layoutcommit_data *data); |
| 178 | int (*prepare_layoutcommit) (struct nfs4_layoutcommit_args *args); |
| 179 | int (*prepare_layoutstats) (struct nfs42_layoutstat_args *args); |
| 180 | }; |
| 181 | |
| 182 | struct pnfs_layout_hdr { |
| 183 | atomic_t plh_refcount; |
| 184 | atomic_t plh_outstanding; /* number of RPCs out */ |
| 185 | struct list_head plh_layouts; /* other client layouts */ |
| 186 | struct list_head plh_bulk_destroy; |
| 187 | struct list_head plh_segs; /* layout segments list */ |
| 188 | struct list_head plh_return_segs; /* invalid layout segments */ |
| 189 | unsigned long plh_block_lgets; /* block LAYOUTGET if >0 */ |
| 190 | unsigned long plh_retry_timestamp; |
| 191 | unsigned long plh_flags; |
| 192 | nfs4_stateid plh_stateid; |
| 193 | u32 plh_barrier; /* ignore lower seqids */ |
| 194 | u32 plh_return_seq; |
| 195 | enum pnfs_iomode plh_return_iomode; |
| 196 | loff_t plh_lwb; /* last write byte for layoutcommit */ |
| 197 | struct rpc_cred *plh_lc_cred; /* layoutcommit cred */ |
| 198 | struct inode *plh_inode; |
| 199 | }; |
| 200 | |
| 201 | struct pnfs_device { |
| 202 | struct nfs4_deviceid dev_id; |
| 203 | unsigned int layout_type; |
| 204 | unsigned int mincount; |
| 205 | unsigned int maxcount; /* gdia_maxcount */ |
| 206 | struct page **pages; |
| 207 | unsigned int pgbase; |
| 208 | unsigned int pglen; /* reply buffer length */ |
| 209 | unsigned char nocache : 1;/* May not be cached */ |
| 210 | }; |
| 211 | |
| 212 | #define NFS4_PNFS_GETDEVLIST_MAXNUM 16 |
| 213 | |
| 214 | struct pnfs_devicelist { |
| 215 | unsigned int eof; |
| 216 | unsigned int num_devs; |
| 217 | struct nfs4_deviceid dev_id[NFS4_PNFS_GETDEVLIST_MAXNUM]; |
| 218 | }; |
| 219 | |
| 220 | extern int pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *); |
| 221 | extern void pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *); |
| 222 | |
| 223 | /* nfs4proc.c */ |
| 224 | extern int nfs4_proc_getdeviceinfo(struct nfs_server *server, |
| 225 | struct pnfs_device *dev, |
| 226 | struct rpc_cred *cred); |
| 227 | extern struct pnfs_layout_segment* nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout, gfp_t gfp_flags); |
| 228 | extern int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync); |
| 229 | |
| 230 | /* pnfs.c */ |
| 231 | void pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo); |
| 232 | void pnfs_put_lseg(struct pnfs_layout_segment *lseg); |
| 233 | |
| 234 | void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, struct nfs_fsinfo *); |
| 235 | void unset_pnfs_layoutdriver(struct nfs_server *); |
| 236 | void pnfs_generic_pg_check_layout(struct nfs_pageio_descriptor *pgio); |
| 237 | void pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *, struct nfs_page *); |
| 238 | int pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc); |
| 239 | void pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio, |
| 240 | struct nfs_page *req, u64 wb_size); |
| 241 | void pnfs_generic_pg_cleanup(struct nfs_pageio_descriptor *); |
| 242 | int pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc); |
| 243 | size_t pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, |
| 244 | struct nfs_page *prev, struct nfs_page *req); |
| 245 | void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg); |
| 246 | struct pnfs_layout_segment *pnfs_layout_process(struct nfs4_layoutget *lgp); |
| 247 | void pnfs_free_lseg_list(struct list_head *tmp_list); |
| 248 | void pnfs_destroy_layout(struct nfs_inode *); |
| 249 | void pnfs_destroy_all_layouts(struct nfs_client *); |
| 250 | int pnfs_destroy_layouts_byfsid(struct nfs_client *clp, |
| 251 | struct nfs_fsid *fsid, |
| 252 | bool is_recall); |
| 253 | int pnfs_destroy_layouts_byclid(struct nfs_client *clp, |
| 254 | bool is_recall); |
| 255 | void pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo); |
| 256 | void pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, |
| 257 | const nfs4_stateid *new, |
| 258 | bool update_barrier); |
| 259 | int pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, |
| 260 | struct list_head *tmp_list, |
| 261 | const struct pnfs_layout_range *recall_range, |
| 262 | u32 seq); |
| 263 | int pnfs_mark_matching_lsegs_return(struct pnfs_layout_hdr *lo, |
| 264 | struct list_head *tmp_list, |
| 265 | const struct pnfs_layout_range *recall_range, |
| 266 | u32 seq); |
| 267 | int pnfs_mark_layout_stateid_invalid(struct pnfs_layout_hdr *lo, |
| 268 | struct list_head *lseg_list); |
| 269 | bool pnfs_roc(struct inode *ino, |
| 270 | struct nfs4_layoutreturn_args *args, |
| 271 | struct nfs4_layoutreturn_res *res, |
| 272 | const struct rpc_cred *cred); |
| 273 | void pnfs_roc_release(struct nfs4_layoutreturn_args *args, |
| 274 | struct nfs4_layoutreturn_res *res, |
| 275 | int ret); |
| 276 | bool pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task); |
| 277 | void pnfs_set_layoutcommit(struct inode *, struct pnfs_layout_segment *, loff_t); |
| 278 | void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data); |
| 279 | int pnfs_layoutcommit_inode(struct inode *inode, bool sync); |
| 280 | int pnfs_generic_sync(struct inode *inode, bool datasync); |
| 281 | int pnfs_nfs_generic_sync(struct inode *inode, bool datasync); |
| 282 | int _pnfs_return_layout(struct inode *); |
| 283 | int pnfs_commit_and_return_layout(struct inode *); |
| 284 | void pnfs_ld_write_done(struct nfs_pgio_header *); |
| 285 | void pnfs_ld_read_done(struct nfs_pgio_header *); |
| 286 | void pnfs_read_resend_pnfs(struct nfs_pgio_header *); |
| 287 | struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino, |
| 288 | struct nfs_open_context *ctx, |
| 289 | loff_t pos, |
| 290 | u64 count, |
| 291 | enum pnfs_iomode iomode, |
| 292 | bool strict_iomode, |
| 293 | gfp_t gfp_flags); |
| 294 | void pnfs_layoutreturn_free_lsegs(struct pnfs_layout_hdr *lo, |
| 295 | const nfs4_stateid *arg_stateid, |
| 296 | const struct pnfs_layout_range *range, |
| 297 | const nfs4_stateid *stateid); |
| 298 | |
| 299 | void pnfs_generic_layout_insert_lseg(struct pnfs_layout_hdr *lo, |
| 300 | struct pnfs_layout_segment *lseg, |
| 301 | bool (*is_after)(const struct pnfs_layout_range *lseg_range, |
| 302 | const struct pnfs_layout_range *old), |
| 303 | bool (*do_merge)(struct pnfs_layout_segment *lseg, |
| 304 | struct pnfs_layout_segment *old), |
| 305 | struct list_head *free_me); |
| 306 | |
| 307 | void nfs4_deviceid_mark_client_invalid(struct nfs_client *clp); |
| 308 | int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *); |
| 309 | int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *); |
| 310 | struct nfs4_threshold *pnfs_mdsthreshold_alloc(void); |
| 311 | void pnfs_error_mark_layout_for_return(struct inode *inode, |
| 312 | struct pnfs_layout_segment *lseg); |
| 313 | /* nfs4_deviceid_flags */ |
| 314 | enum { |
| 315 | NFS_DEVICEID_INVALID = 0, /* set when MDS clientid recalled */ |
| 316 | NFS_DEVICEID_UNAVAILABLE, /* device temporarily unavailable */ |
| 317 | NFS_DEVICEID_NOCACHE, /* device may not be cached */ |
| 318 | }; |
| 319 | |
| 320 | /* pnfs_dev.c */ |
| 321 | struct nfs4_deviceid_node { |
| 322 | struct hlist_node node; |
| 323 | struct hlist_node tmpnode; |
| 324 | const struct pnfs_layoutdriver_type *ld; |
| 325 | const struct nfs_client *nfs_client; |
| 326 | unsigned long flags; |
| 327 | unsigned long timestamp_unavailable; |
| 328 | struct nfs4_deviceid deviceid; |
| 329 | struct rcu_head rcu; |
| 330 | atomic_t ref; |
| 331 | }; |
| 332 | |
| 333 | struct nfs4_deviceid_node * |
| 334 | nfs4_find_get_deviceid(struct nfs_server *server, |
| 335 | const struct nfs4_deviceid *id, struct rpc_cred *cred, |
| 336 | gfp_t gfp_mask); |
| 337 | void nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *); |
| 338 | void nfs4_init_deviceid_node(struct nfs4_deviceid_node *, struct nfs_server *, |
| 339 | const struct nfs4_deviceid *); |
| 340 | bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *); |
| 341 | void nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node); |
| 342 | bool nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node); |
| 343 | void nfs4_deviceid_purge_client(const struct nfs_client *); |
| 344 | |
| 345 | /* pnfs_nfs.c */ |
| 346 | void pnfs_generic_clear_request_commit(struct nfs_page *req, |
| 347 | struct nfs_commit_info *cinfo); |
| 348 | void pnfs_generic_commit_release(void *calldata); |
| 349 | void pnfs_generic_prepare_to_resend_writes(struct nfs_commit_data *data); |
| 350 | void pnfs_generic_rw_release(void *data); |
| 351 | void pnfs_generic_recover_commit_reqs(struct list_head *dst, |
| 352 | struct nfs_commit_info *cinfo); |
| 353 | int pnfs_generic_commit_pagelist(struct inode *inode, |
| 354 | struct list_head *mds_pages, |
| 355 | int how, |
| 356 | struct nfs_commit_info *cinfo, |
| 357 | int (*initiate_commit)(struct nfs_commit_data *data, |
| 358 | int how)); |
| 359 | int pnfs_generic_scan_commit_lists(struct nfs_commit_info *cinfo, int max); |
| 360 | void pnfs_generic_write_commit_done(struct rpc_task *task, void *data); |
| 361 | void nfs4_pnfs_ds_put(struct nfs4_pnfs_ds *ds); |
| 362 | struct nfs4_pnfs_ds *nfs4_pnfs_ds_add(struct list_head *dsaddrs, |
| 363 | gfp_t gfp_flags); |
| 364 | void nfs4_pnfs_v3_ds_connect_unload(void); |
| 365 | int nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds, |
| 366 | struct nfs4_deviceid_node *devid, unsigned int timeo, |
| 367 | unsigned int retrans, u32 version, u32 minor_version); |
| 368 | struct nfs4_pnfs_ds_addr *nfs4_decode_mp_ds_addr(struct net *net, |
| 369 | struct xdr_stream *xdr, |
| 370 | gfp_t gfp_flags); |
| 371 | void pnfs_layout_mark_request_commit(struct nfs_page *req, |
| 372 | struct pnfs_layout_segment *lseg, |
| 373 | struct nfs_commit_info *cinfo, |
| 374 | u32 ds_commit_idx); |
| 375 | |
| 376 | static inline bool nfs_have_layout(struct inode *inode) |
| 377 | { |
| 378 | return NFS_I(inode)->layout != NULL; |
| 379 | } |
| 380 | |
| 381 | static inline bool pnfs_layout_is_valid(const struct pnfs_layout_hdr *lo) |
| 382 | { |
| 383 | return test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) == 0; |
| 384 | } |
| 385 | |
| 386 | static inline struct nfs4_deviceid_node * |
| 387 | nfs4_get_deviceid(struct nfs4_deviceid_node *d) |
| 388 | { |
| 389 | atomic_inc(&d->ref); |
| 390 | return d; |
| 391 | } |
| 392 | |
| 393 | static inline struct pnfs_layout_segment * |
| 394 | pnfs_get_lseg(struct pnfs_layout_segment *lseg) |
| 395 | { |
| 396 | if (lseg) { |
| 397 | atomic_inc(&lseg->pls_refcount); |
| 398 | smp_mb__after_atomic(); |
| 399 | } |
| 400 | return lseg; |
| 401 | } |
| 402 | |
| 403 | static inline bool |
| 404 | pnfs_is_valid_lseg(struct pnfs_layout_segment *lseg) |
| 405 | { |
| 406 | return test_bit(NFS_LSEG_VALID, &lseg->pls_flags) != 0; |
| 407 | } |
| 408 | |
| 409 | /* Return true if a layout driver is being used for this mountpoint */ |
| 410 | static inline int pnfs_enabled_sb(struct nfs_server *nfss) |
| 411 | { |
| 412 | return nfss->pnfs_curr_ld != NULL; |
| 413 | } |
| 414 | |
| 415 | static inline int |
| 416 | pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, |
| 417 | struct nfs_commit_info *cinfo) |
| 418 | { |
| 419 | if (cinfo->ds == NULL || cinfo->ds->ncommitting == 0) |
| 420 | return PNFS_NOT_ATTEMPTED; |
| 421 | return NFS_SERVER(inode)->pnfs_curr_ld->commit_pagelist(inode, mds_pages, how, cinfo); |
| 422 | } |
| 423 | |
| 424 | static inline struct pnfs_ds_commit_info * |
| 425 | pnfs_get_ds_info(struct inode *inode) |
| 426 | { |
| 427 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; |
| 428 | |
| 429 | if (ld == NULL || ld->get_ds_info == NULL) |
| 430 | return NULL; |
| 431 | return ld->get_ds_info(inode); |
| 432 | } |
| 433 | |
| 434 | static inline void |
| 435 | pnfs_generic_mark_devid_invalid(struct nfs4_deviceid_node *node) |
| 436 | { |
| 437 | set_bit(NFS_DEVICEID_INVALID, &node->flags); |
| 438 | } |
| 439 | |
| 440 | static inline bool |
| 441 | pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, |
| 442 | struct nfs_commit_info *cinfo, u32 ds_commit_idx) |
| 443 | { |
| 444 | struct inode *inode = d_inode(req->wb_context->dentry); |
| 445 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; |
| 446 | |
| 447 | if (lseg == NULL || ld->mark_request_commit == NULL) |
| 448 | return false; |
| 449 | ld->mark_request_commit(req, lseg, cinfo, ds_commit_idx); |
| 450 | return true; |
| 451 | } |
| 452 | |
| 453 | static inline bool |
| 454 | pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) |
| 455 | { |
| 456 | struct inode *inode = d_inode(req->wb_context->dentry); |
| 457 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; |
| 458 | |
| 459 | if (ld == NULL || ld->clear_request_commit == NULL) |
| 460 | return false; |
| 461 | ld->clear_request_commit(req, cinfo); |
| 462 | return true; |
| 463 | } |
| 464 | |
| 465 | static inline int |
| 466 | pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, |
| 467 | int max) |
| 468 | { |
| 469 | if (cinfo->ds == NULL || cinfo->ds->nwritten == 0) |
| 470 | return 0; |
| 471 | else |
| 472 | return NFS_SERVER(inode)->pnfs_curr_ld->scan_commit_lists(cinfo, max); |
| 473 | } |
| 474 | |
| 475 | static inline struct nfs_page * |
| 476 | pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo, |
| 477 | struct page *page) |
| 478 | { |
| 479 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; |
| 480 | |
| 481 | if (ld == NULL || ld->search_commit_reqs == NULL) |
| 482 | return NULL; |
| 483 | return ld->search_commit_reqs(cinfo, page); |
| 484 | } |
| 485 | |
| 486 | /* Should the pNFS client commit and return the layout upon a setattr */ |
| 487 | static inline bool |
| 488 | pnfs_ld_layoutret_on_setattr(struct inode *inode) |
| 489 | { |
| 490 | if (!pnfs_enabled_sb(NFS_SERVER(inode))) |
| 491 | return false; |
| 492 | return NFS_SERVER(inode)->pnfs_curr_ld->flags & |
| 493 | PNFS_LAYOUTRET_ON_SETATTR; |
| 494 | } |
| 495 | |
| 496 | static inline bool |
| 497 | pnfs_ld_read_whole_page(struct inode *inode) |
| 498 | { |
| 499 | if (!pnfs_enabled_sb(NFS_SERVER(inode))) |
| 500 | return false; |
| 501 | return NFS_SERVER(inode)->pnfs_curr_ld->flags & PNFS_READ_WHOLE_PAGE; |
| 502 | } |
| 503 | |
| 504 | static inline int |
| 505 | pnfs_sync_inode(struct inode *inode, bool datasync) |
| 506 | { |
| 507 | if (!pnfs_enabled_sb(NFS_SERVER(inode))) |
| 508 | return 0; |
| 509 | return NFS_SERVER(inode)->pnfs_curr_ld->sync(inode, datasync); |
| 510 | } |
| 511 | |
| 512 | static inline bool |
| 513 | pnfs_layoutcommit_outstanding(struct inode *inode) |
| 514 | { |
| 515 | struct nfs_inode *nfsi = NFS_I(inode); |
| 516 | |
| 517 | return test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags) != 0 || |
| 518 | test_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags) != 0; |
| 519 | } |
| 520 | |
| 521 | static inline int pnfs_return_layout(struct inode *ino) |
| 522 | { |
| 523 | struct nfs_inode *nfsi = NFS_I(ino); |
| 524 | struct nfs_server *nfss = NFS_SERVER(ino); |
| 525 | |
| 526 | if (pnfs_enabled_sb(nfss) && nfsi->layout) |
| 527 | return _pnfs_return_layout(ino); |
| 528 | |
| 529 | return 0; |
| 530 | } |
| 531 | |
| 532 | static inline bool |
| 533 | pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, |
| 534 | struct nfs_server *nfss) |
| 535 | { |
| 536 | return (dst && src && src->bm != 0 && nfss->pnfs_curr_ld && |
| 537 | nfss->pnfs_curr_ld->id == src->l_type); |
| 538 | } |
| 539 | |
| 540 | static inline u64 |
| 541 | pnfs_calc_offset_end(u64 offset, u64 len) |
| 542 | { |
| 543 | if (len == NFS4_MAX_UINT64 || len >= NFS4_MAX_UINT64 - offset) |
| 544 | return NFS4_MAX_UINT64; |
| 545 | return offset + len - 1; |
| 546 | } |
| 547 | |
| 548 | static inline u64 |
| 549 | pnfs_calc_offset_length(u64 offset, u64 end) |
| 550 | { |
| 551 | if (end == NFS4_MAX_UINT64 || end <= offset) |
| 552 | return NFS4_MAX_UINT64; |
| 553 | return 1 + end - offset; |
| 554 | } |
| 555 | |
| 556 | static inline void |
| 557 | pnfs_copy_range(struct pnfs_layout_range *dst, |
| 558 | const struct pnfs_layout_range *src) |
| 559 | { |
| 560 | memcpy(dst, src, sizeof(*dst)); |
| 561 | } |
| 562 | |
| 563 | static inline u64 |
| 564 | pnfs_end_offset(u64 start, u64 len) |
| 565 | { |
| 566 | if (NFS4_MAX_UINT64 - start <= len) |
| 567 | return NFS4_MAX_UINT64; |
| 568 | return start + len; |
| 569 | } |
| 570 | |
| 571 | /* |
| 572 | * Are 2 ranges intersecting? |
| 573 | * start1 end1 |
| 574 | * [----------------------------------) |
| 575 | * start2 end2 |
| 576 | * [----------------) |
| 577 | */ |
| 578 | static inline bool |
| 579 | pnfs_is_range_intersecting(u64 start1, u64 end1, u64 start2, u64 end2) |
| 580 | { |
| 581 | return (end1 == NFS4_MAX_UINT64 || start2 < end1) && |
| 582 | (end2 == NFS4_MAX_UINT64 || start1 < end2); |
| 583 | } |
| 584 | |
| 585 | static inline bool |
| 586 | pnfs_lseg_range_intersecting(const struct pnfs_layout_range *l1, |
| 587 | const struct pnfs_layout_range *l2) |
| 588 | { |
| 589 | u64 end1 = pnfs_end_offset(l1->offset, l1->length); |
| 590 | u64 end2 = pnfs_end_offset(l2->offset, l2->length); |
| 591 | |
| 592 | return pnfs_is_range_intersecting(l1->offset, end1, l2->offset, end2); |
| 593 | } |
| 594 | |
| 595 | static inline bool |
| 596 | pnfs_lseg_request_intersecting(struct pnfs_layout_segment *lseg, struct nfs_page *req) |
| 597 | { |
| 598 | u64 seg_last = pnfs_end_offset(lseg->pls_range.offset, lseg->pls_range.length); |
| 599 | u64 req_last = req_offset(req) + req->wb_bytes; |
| 600 | |
| 601 | return pnfs_is_range_intersecting(lseg->pls_range.offset, seg_last, |
| 602 | req_offset(req), req_last); |
| 603 | } |
| 604 | |
| 605 | extern unsigned int layoutstats_timer; |
| 606 | |
| 607 | #ifdef NFS_DEBUG |
| 608 | void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id); |
| 609 | #else |
| 610 | static inline void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id) |
| 611 | { |
| 612 | } |
| 613 | |
| 614 | #endif /* NFS_DEBUG */ |
| 615 | #else /* CONFIG_NFS_V4_1 */ |
| 616 | |
| 617 | static inline bool nfs_have_layout(struct inode *inode) |
| 618 | { |
| 619 | return false; |
| 620 | } |
| 621 | |
| 622 | static inline void pnfs_destroy_all_layouts(struct nfs_client *clp) |
| 623 | { |
| 624 | } |
| 625 | |
| 626 | static inline void pnfs_destroy_layout(struct nfs_inode *nfsi) |
| 627 | { |
| 628 | } |
| 629 | |
| 630 | static inline struct pnfs_layout_segment * |
| 631 | pnfs_get_lseg(struct pnfs_layout_segment *lseg) |
| 632 | { |
| 633 | return NULL; |
| 634 | } |
| 635 | |
| 636 | static inline void pnfs_put_lseg(struct pnfs_layout_segment *lseg) |
| 637 | { |
| 638 | } |
| 639 | |
| 640 | static inline int pnfs_return_layout(struct inode *ino) |
| 641 | { |
| 642 | return 0; |
| 643 | } |
| 644 | |
| 645 | static inline int pnfs_commit_and_return_layout(struct inode *inode) |
| 646 | { |
| 647 | return 0; |
| 648 | } |
| 649 | |
| 650 | static inline bool |
| 651 | pnfs_ld_layoutret_on_setattr(struct inode *inode) |
| 652 | { |
| 653 | return false; |
| 654 | } |
| 655 | |
| 656 | static inline bool |
| 657 | pnfs_ld_read_whole_page(struct inode *inode) |
| 658 | { |
| 659 | return false; |
| 660 | } |
| 661 | |
| 662 | static inline int |
| 663 | pnfs_sync_inode(struct inode *inode, bool datasync) |
| 664 | { |
| 665 | return 0; |
| 666 | } |
| 667 | |
| 668 | static inline bool |
| 669 | pnfs_layoutcommit_outstanding(struct inode *inode) |
| 670 | { |
| 671 | return false; |
| 672 | } |
| 673 | |
| 674 | |
| 675 | static inline bool |
| 676 | pnfs_roc(struct inode *ino, |
| 677 | struct nfs4_layoutreturn_args *args, |
| 678 | struct nfs4_layoutreturn_res *res, |
| 679 | const struct rpc_cred *cred) |
| 680 | { |
| 681 | return false; |
| 682 | } |
| 683 | |
| 684 | static inline void |
| 685 | pnfs_roc_release(struct nfs4_layoutreturn_args *args, |
| 686 | struct nfs4_layoutreturn_res *res, |
| 687 | int ret) |
| 688 | { |
| 689 | } |
| 690 | |
| 691 | static inline bool |
| 692 | pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task) |
| 693 | { |
| 694 | return false; |
| 695 | } |
| 696 | |
| 697 | static inline void set_pnfs_layoutdriver(struct nfs_server *s, |
| 698 | const struct nfs_fh *mntfh, |
| 699 | struct nfs_fsinfo *fsinfo) |
| 700 | { |
| 701 | } |
| 702 | |
| 703 | static inline void unset_pnfs_layoutdriver(struct nfs_server *s) |
| 704 | { |
| 705 | } |
| 706 | |
| 707 | static inline int |
| 708 | pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, |
| 709 | struct nfs_commit_info *cinfo) |
| 710 | { |
| 711 | return PNFS_NOT_ATTEMPTED; |
| 712 | } |
| 713 | |
| 714 | static inline struct pnfs_ds_commit_info * |
| 715 | pnfs_get_ds_info(struct inode *inode) |
| 716 | { |
| 717 | return NULL; |
| 718 | } |
| 719 | |
| 720 | static inline bool |
| 721 | pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, |
| 722 | struct nfs_commit_info *cinfo, u32 ds_commit_idx) |
| 723 | { |
| 724 | return false; |
| 725 | } |
| 726 | |
| 727 | static inline bool |
| 728 | pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) |
| 729 | { |
| 730 | return false; |
| 731 | } |
| 732 | |
| 733 | static inline int |
| 734 | pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, |
| 735 | int max) |
| 736 | { |
| 737 | return 0; |
| 738 | } |
| 739 | |
| 740 | static inline struct nfs_page * |
| 741 | pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo, |
| 742 | struct page *page) |
| 743 | { |
| 744 | return NULL; |
| 745 | } |
| 746 | |
| 747 | static inline int pnfs_layoutcommit_inode(struct inode *inode, bool sync) |
| 748 | { |
| 749 | return 0; |
| 750 | } |
| 751 | |
| 752 | static inline bool |
| 753 | pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, |
| 754 | struct nfs_server *nfss) |
| 755 | { |
| 756 | return false; |
| 757 | } |
| 758 | |
| 759 | static inline struct nfs4_threshold *pnfs_mdsthreshold_alloc(void) |
| 760 | { |
| 761 | return NULL; |
| 762 | } |
| 763 | |
| 764 | static inline void nfs4_pnfs_v3_ds_connect_unload(void) |
| 765 | { |
| 766 | } |
| 767 | |
| 768 | #endif /* CONFIG_NFS_V4_1 */ |
| 769 | |
| 770 | #if IS_ENABLED(CONFIG_NFS_V4_2) |
| 771 | int pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags); |
| 772 | #else |
| 773 | static inline int |
| 774 | pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags) |
| 775 | { |
| 776 | return 0; |
| 777 | } |
| 778 | #endif |
| 779 | |
| 780 | #endif /* FS_NFS_PNFS_H */ |