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85e174ba RL |
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 | ||
45df3c8b | 33 | #include <linux/nfs_fs.h> |
94ad1c80 | 34 | #include <linux/nfs_page.h> |
e6cf82d1 | 35 | #include <linux/workqueue.h> |
94ad1c80 | 36 | |
4541d16c FI |
37 | enum { |
38 | NFS_LSEG_VALID = 0, /* cleared when lseg is recalled/returned */ | |
f7e8917a | 39 | NFS_LSEG_ROC, /* roc bit received from server */ |
a9bae566 | 40 | NFS_LSEG_LAYOUTCOMMIT, /* layoutcommit bit set for layoutcommit */ |
016256df | 41 | NFS_LSEG_LAYOUTRETURN, /* layoutreturn bit set for layoutreturn */ |
4541d16c FI |
42 | }; |
43 | ||
875ae069 PT |
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 */ | |
4541d16c FI |
60 | }; |
61 | ||
974cec8c | 62 | struct pnfs_layout_segment { |
566052c5 | 63 | struct list_head pls_list; |
a9bae566 | 64 | struct list_head pls_lc_list; |
566052c5 | 65 | struct pnfs_layout_range pls_range; |
4541d16c | 66 | atomic_t pls_refcount; |
66755283 | 67 | u32 pls_seq; |
4541d16c | 68 | unsigned long pls_flags; |
566052c5 | 69 | struct pnfs_layout_hdr *pls_layout; |
e6cf82d1 | 70 | struct work_struct pls_work; |
974cec8c AA |
71 | }; |
72 | ||
64419a9b AA |
73 | enum pnfs_try_status { |
74 | PNFS_ATTEMPTED = 0, | |
75 | PNFS_NOT_ATTEMPTED = 1, | |
ceb11e13 | 76 | PNFS_TRY_AGAIN = 2, |
64419a9b AA |
77 | }; |
78 | ||
85e174ba RL |
79 | #ifdef CONFIG_NFS_V4_1 |
80 | ||
81 | #define LAYOUT_NFSV4_1_MODULE_PREFIX "nfs-layouttype4" | |
82 | ||
39280a5a PT |
83 | /* |
84 | * Default data server connection timeout and retrans vaules. | |
85 | * Set by module parameters dataserver_timeo and dataserver_retrans. | |
86 | */ | |
87 | #define NFS4_DEF_DS_TIMEO 600 /* in tenths of a second */ | |
88 | #define NFS4_DEF_DS_RETRANS 5 | |
89 | ||
90 | /* error codes for internal use */ | |
91 | #define NFS4ERR_RESET_TO_MDS 12001 | |
92 | #define NFS4ERR_RESET_TO_PNFS 12002 | |
93 | ||
e5e94017 BH |
94 | enum { |
95 | NFS_LAYOUT_RO_FAILED = 0, /* get ro layout failed stop trying */ | |
96 | NFS_LAYOUT_RW_FAILED, /* get rw layout failed stop trying */ | |
43f1b3da | 97 | NFS_LAYOUT_BULK_RECALL, /* bulk recall affecting layout */ |
2370abda | 98 | NFS_LAYOUT_RETURN, /* layoutreturn in progress */ |
6604b203 | 99 | NFS_LAYOUT_RETURN_LOCK, /* Serialise layoutreturn */ |
2370abda | 100 | NFS_LAYOUT_RETURN_REQUESTED, /* Return this layout ASAP */ |
47abadef | 101 | NFS_LAYOUT_INVALID_STID, /* layout stateid id is invalid */ |
9bf87482 | 102 | NFS_LAYOUT_FIRST_LAYOUTGET, /* Serialize first layoutget */ |
e5e94017 BH |
103 | }; |
104 | ||
8a1636c4 | 105 | enum layoutdriver_policy_flags { |
88ac815c PT |
106 | /* Should the pNFS client commit and return the layout upon truncate to |
107 | * a smaller size */ | |
8a1636c4 | 108 | PNFS_LAYOUTRET_ON_SETATTR = 1 << 0, |
fe0fe835 | 109 | PNFS_LAYOUTRET_ON_ERROR = 1 << 1, |
612aa983 | 110 | PNFS_READ_WHOLE_PAGE = 1 << 2, |
8a1636c4 BH |
111 | }; |
112 | ||
1775bc34 BH |
113 | struct nfs4_deviceid_node; |
114 | ||
85e174ba RL |
115 | /* Per-layout driver specific registration structure */ |
116 | struct pnfs_layoutdriver_type { | |
02c35fca FI |
117 | struct list_head pnfs_tblid; |
118 | const u32 id; | |
119 | const char *name; | |
120 | struct module *owner; | |
8a1636c4 | 121 | unsigned flags; |
661373b1 | 122 | unsigned max_deviceinfo_size; |
636fb9c8 | 123 | |
738fd0f3 BH |
124 | int (*set_layoutdriver) (struct nfs_server *, const struct nfs_fh *); |
125 | int (*clear_layoutdriver) (struct nfs_server *); | |
126 | ||
636fb9c8 BH |
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 | ||
a75b9df9 | 130 | struct pnfs_layout_segment * (*alloc_lseg) (struct pnfs_layout_hdr *layoutid, struct nfs4_layoutget_res *lgr, gfp_t gfp_flags); |
b1f69b75 | 131 | void (*free_lseg) (struct pnfs_layout_segment *lseg); |
03772d2f TM |
132 | void (*add_lseg) (struct pnfs_layout_hdr *layoutid, |
133 | struct pnfs_layout_segment *lseg, | |
134 | struct list_head *free_me); | |
94ad1c80 | 135 | |
c88953d8 CH |
136 | void (*return_range) (struct pnfs_layout_hdr *lo, |
137 | struct pnfs_layout_range *range); | |
138 | ||
94ad1c80 | 139 | /* test for nfs page cache coalescing */ |
1751c363 TM |
140 | const struct nfs_pageio_ops *pg_read_ops; |
141 | const struct nfs_pageio_ops *pg_write_ops; | |
64419a9b | 142 | |
ea2cf228 | 143 | struct pnfs_ds_commit_info *(*get_ds_info) (struct inode *inode); |
8dd37758 | 144 | void (*mark_request_commit) (struct nfs_page *req, |
ea2cf228 | 145 | struct pnfs_layout_segment *lseg, |
b57ff130 WAA |
146 | struct nfs_commit_info *cinfo, |
147 | u32 ds_commit_idx); | |
ea2cf228 FI |
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); | |
1763da12 FI |
152 | void (*recover_commit_reqs) (struct list_head *list, |
153 | struct nfs_commit_info *cinfo); | |
02d1426c WAA |
154 | struct nfs_page * (*search_commit_reqs)(struct nfs_commit_info *cinfo, |
155 | struct page *page); | |
ea2cf228 FI |
156 | int (*commit_pagelist)(struct inode *inode, |
157 | struct list_head *mds_pages, | |
158 | int how, | |
159 | struct nfs_commit_info *cinfo); | |
a861a1e1 | 160 | |
5bb89b47 TM |
161 | int (*sync)(struct inode *inode, bool datasync); |
162 | ||
64419a9b AA |
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 | */ | |
d45f60c6 WAA |
167 | enum pnfs_try_status (*read_pagelist)(struct nfs_pgio_header *); |
168 | enum pnfs_try_status (*write_pagelist)(struct nfs_pgio_header *, int); | |
1775bc34 BH |
169 | |
170 | void (*free_deviceid_node) (struct nfs4_deviceid_node *); | |
661373b1 CH |
171 | struct nfs4_deviceid_node * (*alloc_deviceid_node) |
172 | (struct nfs_server *server, struct pnfs_device *pdev, | |
173 | gfp_t gfp_flags); | |
04a55549 | 174 | |
94e5c571 | 175 | void (*encode_layoutreturn) (struct xdr_stream *xdr, |
04a55549 | 176 | const struct nfs4_layoutreturn_args *args); |
ac7db726 | 177 | |
db29c089 | 178 | void (*cleanup_layoutcommit) (struct nfs4_layoutcommit_data *data); |
5f919c9f CH |
179 | int (*prepare_layoutcommit) (struct nfs4_layoutcommit_args *args); |
180 | void (*encode_layoutcommit) (struct pnfs_layout_hdr *lo, | |
ac7db726 BH |
181 | struct xdr_stream *xdr, |
182 | const struct nfs4_layoutcommit_args *args); | |
8733408d PT |
183 | int (*prepare_layoutstats) (struct nfs42_layoutstat_args *args); |
184 | void (*cleanup_layoutstats) (struct nfs42_layoutstat_data *data); | |
85e174ba RL |
185 | }; |
186 | ||
e5e94017 | 187 | struct pnfs_layout_hdr { |
cc6e5340 | 188 | atomic_t plh_refcount; |
82714bd1 | 189 | atomic_t plh_outstanding; /* number of RPCs out */ |
b7edfaa1 | 190 | struct list_head plh_layouts; /* other client layouts */ |
fd9a8d71 | 191 | struct list_head plh_bulk_destroy; |
b7edfaa1 | 192 | struct list_head plh_segs; /* layout segments list */ |
68f74479 | 193 | struct list_head plh_return_segs; /* invalid layout segments */ |
f7e8917a | 194 | unsigned long plh_block_lgets; /* block LAYOUTGET if >0 */ |
25c75333 | 195 | unsigned long plh_retry_timestamp; |
566052c5 | 196 | unsigned long plh_flags; |
82714bd1 TM |
197 | nfs4_stateid plh_stateid; |
198 | u32 plh_barrier; /* ignore lower seqids */ | |
3982a6a2 | 199 | u32 plh_return_seq; |
016256df | 200 | enum pnfs_iomode plh_return_iomode; |
acff5880 | 201 | loff_t plh_lwb; /* last write byte for layoutcommit */ |
9fa40758 | 202 | struct rpc_cred *plh_lc_cred; /* layoutcommit cred */ |
b7edfaa1 | 203 | struct inode *plh_inode; |
e5e94017 BH |
204 | }; |
205 | ||
b1f69b75 AA |
206 | struct pnfs_device { |
207 | struct nfs4_deviceid dev_id; | |
208 | unsigned int layout_type; | |
209 | unsigned int mincount; | |
f1c097be | 210 | unsigned int maxcount; /* gdia_maxcount */ |
b1f69b75 | 211 | struct page **pages; |
b1f69b75 | 212 | unsigned int pgbase; |
f1c097be | 213 | unsigned int pglen; /* reply buffer length */ |
df52699e | 214 | unsigned char nocache : 1;/* May not be cached */ |
b1f69b75 AA |
215 | }; |
216 | ||
7f11d8d3 AA |
217 | #define NFS4_PNFS_GETDEVLIST_MAXNUM 16 |
218 | ||
219 | struct pnfs_devicelist { | |
220 | unsigned int eof; | |
221 | unsigned int num_devs; | |
222 | struct nfs4_deviceid dev_id[NFS4_PNFS_GETDEVLIST_MAXNUM]; | |
223 | }; | |
224 | ||
02c35fca FI |
225 | extern int pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *); |
226 | extern void pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *); | |
227 | ||
b1f69b75 AA |
228 | /* nfs4proc.c */ |
229 | extern int nfs4_proc_getdeviceinfo(struct nfs_server *server, | |
cd5875fe TM |
230 | struct pnfs_device *dev, |
231 | struct rpc_cred *cred); | |
183d9e7b | 232 | extern struct pnfs_layout_segment* nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout, gfp_t gfp_flags); |
6c16605d | 233 | extern int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync); |
b1f69b75 AA |
234 | |
235 | /* pnfs.c */ | |
70c3bd2b | 236 | void pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo); |
9369a431 | 237 | void pnfs_put_lseg(struct pnfs_layout_segment *lseg); |
6543f803 | 238 | void pnfs_put_lseg_locked(struct pnfs_layout_segment *lseg); |
1751c363 | 239 | |
ca440c38 | 240 | void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, struct nfs_fsinfo *); |
85e174ba | 241 | void unset_pnfs_layoutdriver(struct nfs_server *); |
d8007d4d | 242 | void pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *, struct nfs_page *); |
493292dd | 243 | int pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc); |
6296556f PT |
244 | void pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio, |
245 | struct nfs_page *req, u64 wb_size); | |
180bb5ec | 246 | void pnfs_generic_pg_cleanup(struct nfs_pageio_descriptor *); |
dce81290 | 247 | int pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc); |
b4fdac1a WAA |
248 | size_t pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, |
249 | struct nfs_page *prev, struct nfs_page *req); | |
1b0ae068 | 250 | void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg); |
a0b0a6e3 | 251 | struct pnfs_layout_segment *pnfs_layout_process(struct nfs4_layoutget *lgp); |
43f1b3da | 252 | void pnfs_free_lseg_list(struct list_head *tmp_list); |
e5e94017 | 253 | void pnfs_destroy_layout(struct nfs_inode *); |
974cec8c | 254 | void pnfs_destroy_all_layouts(struct nfs_client *); |
fd9a8d71 TM |
255 | int pnfs_destroy_layouts_byfsid(struct nfs_client *clp, |
256 | struct nfs_fsid *fsid, | |
257 | bool is_recall); | |
258 | int pnfs_destroy_layouts_byclid(struct nfs_client *clp, | |
259 | bool is_recall); | |
70c3bd2b | 260 | void pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo); |
43f1b3da FI |
261 | void pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, |
262 | const nfs4_stateid *new, | |
263 | bool update_barrier); | |
49a85061 | 264 | int pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, |
43f1b3da | 265 | struct list_head *tmp_list, |
6d597e17 JL |
266 | const struct pnfs_layout_range *recall_range, |
267 | u32 seq); | |
10335556 | 268 | int pnfs_mark_matching_lsegs_return(struct pnfs_layout_hdr *lo, |
fc7ff367 | 269 | struct list_head *tmp_list, |
6d597e17 JL |
270 | const struct pnfs_layout_range *recall_range, |
271 | u32 seq); | |
5f46be04 TM |
272 | int pnfs_mark_layout_stateid_invalid(struct pnfs_layout_hdr *lo, |
273 | struct list_head *lseg_list); | |
f7e8917a FI |
274 | bool pnfs_roc(struct inode *ino); |
275 | void pnfs_roc_release(struct inode *ino); | |
276 | void pnfs_roc_set_barrier(struct inode *ino, u32 barrier); | |
4ff376fe | 277 | void pnfs_roc_get_barrier(struct inode *ino, u32 *barrier); |
500d701f | 278 | bool pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task); |
67af7611 | 279 | void pnfs_set_layoutcommit(struct inode *, struct pnfs_layout_segment *, loff_t); |
db29c089 | 280 | void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data); |
ef311537 | 281 | int pnfs_layoutcommit_inode(struct inode *inode, bool sync); |
5bb89b47 TM |
282 | int pnfs_generic_sync(struct inode *inode, bool datasync); |
283 | int pnfs_nfs_generic_sync(struct inode *inode, bool datasync); | |
cbe82603 | 284 | int _pnfs_return_layout(struct inode *); |
24028672 | 285 | int pnfs_commit_and_return_layout(struct inode *); |
d45f60c6 WAA |
286 | void pnfs_ld_write_done(struct nfs_pgio_header *); |
287 | void pnfs_ld_read_done(struct nfs_pgio_header *); | |
1b1bc66b | 288 | void pnfs_read_resend_pnfs(struct nfs_pgio_header *); |
7c24d948 AA |
289 | struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino, |
290 | struct nfs_open_context *ctx, | |
291 | loff_t pos, | |
292 | u64 count, | |
293 | enum pnfs_iomode iomode, | |
c7d73af2 | 294 | bool strict_iomode, |
7c24d948 | 295 | gfp_t gfp_flags); |
68f74479 | 296 | void pnfs_layoutreturn_free_lsegs(struct pnfs_layout_hdr *lo, |
2a974425 | 297 | const nfs4_stateid *arg_stateid, |
68f74479 | 298 | const struct pnfs_layout_range *range, |
68f74479 | 299 | const nfs4_stateid *stateid); |
e5e94017 | 300 | |
03772d2f TM |
301 | void pnfs_generic_layout_insert_lseg(struct pnfs_layout_hdr *lo, |
302 | struct pnfs_layout_segment *lseg, | |
303 | bool (*is_after)(const struct pnfs_layout_range *lseg_range, | |
304 | const struct pnfs_layout_range *old), | |
305 | bool (*do_merge)(struct pnfs_layout_segment *lseg, | |
306 | struct pnfs_layout_segment *old), | |
307 | struct list_head *free_me); | |
308 | ||
c47abcf8 | 309 | void nfs4_deviceid_mark_client_invalid(struct nfs_client *clp); |
53113ad3 WAA |
310 | int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *); |
311 | int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *); | |
82be417a | 312 | struct nfs4_threshold *pnfs_mdsthreshold_alloc(void); |
016256df PT |
313 | void pnfs_error_mark_layout_for_return(struct inode *inode, |
314 | struct pnfs_layout_segment *lseg); | |
c47abcf8 AA |
315 | /* nfs4_deviceid_flags */ |
316 | enum { | |
317 | NFS_DEVICEID_INVALID = 0, /* set when MDS clientid recalled */ | |
1dfed273 | 318 | NFS_DEVICEID_UNAVAILABLE, /* device temporarily unavailable */ |
df52699e | 319 | NFS_DEVICEID_NOCACHE, /* device may not be cached */ |
c47abcf8 AA |
320 | }; |
321 | ||
a1eaecbc BH |
322 | /* pnfs_dev.c */ |
323 | struct nfs4_deviceid_node { | |
324 | struct hlist_node node; | |
9e3bd4e2 | 325 | struct hlist_node tmpnode; |
1775bc34 | 326 | const struct pnfs_layoutdriver_type *ld; |
a1eaecbc | 327 | const struct nfs_client *nfs_client; |
c47abcf8 | 328 | unsigned long flags; |
1dfed273 | 329 | unsigned long timestamp_unavailable; |
a1eaecbc | 330 | struct nfs4_deviceid deviceid; |
84a80f62 | 331 | struct rcu_head rcu; |
a1eaecbc BH |
332 | atomic_t ref; |
333 | }; | |
334 | ||
661373b1 CH |
335 | struct nfs4_deviceid_node * |
336 | nfs4_find_get_deviceid(struct nfs_server *server, | |
337 | const struct nfs4_deviceid *id, struct rpc_cred *cred, | |
338 | gfp_t gfp_mask); | |
35c8bb54 | 339 | void nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *); |
661373b1 | 340 | void nfs4_init_deviceid_node(struct nfs4_deviceid_node *, struct nfs_server *, |
a1eaecbc | 341 | const struct nfs4_deviceid *); |
a1eaecbc | 342 | bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *); |
1dfed273 TM |
343 | void nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node); |
344 | bool nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node); | |
1775bc34 | 345 | void nfs4_deviceid_purge_client(const struct nfs_client *); |
a1eaecbc | 346 | |
f54bcf2e TH |
347 | /* pnfs_nfs.c */ |
348 | void pnfs_generic_clear_request_commit(struct nfs_page *req, | |
349 | struct nfs_commit_info *cinfo); | |
350 | void pnfs_generic_commit_release(void *calldata); | |
351 | void pnfs_generic_prepare_to_resend_writes(struct nfs_commit_data *data); | |
352 | void pnfs_generic_rw_release(void *data); | |
353 | void pnfs_generic_recover_commit_reqs(struct list_head *dst, | |
354 | struct nfs_commit_info *cinfo); | |
355 | int pnfs_generic_commit_pagelist(struct inode *inode, | |
356 | struct list_head *mds_pages, | |
357 | int how, | |
358 | struct nfs_commit_info *cinfo, | |
359 | int (*initiate_commit)(struct nfs_commit_data *data, | |
360 | int how)); | |
361 | int pnfs_generic_scan_commit_lists(struct nfs_commit_info *cinfo, int max); | |
362 | void pnfs_generic_write_commit_done(struct rpc_task *task, void *data); | |
875ae069 PT |
363 | void nfs4_pnfs_ds_put(struct nfs4_pnfs_ds *ds); |
364 | struct nfs4_pnfs_ds *nfs4_pnfs_ds_add(struct list_head *dsaddrs, | |
365 | gfp_t gfp_flags); | |
5f01d953 | 366 | void nfs4_pnfs_v3_ds_connect_unload(void); |
7405f9e1 PT |
367 | void nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds, |
368 | struct nfs4_deviceid_node *devid, unsigned int timeo, | |
5f01d953 | 369 | unsigned int retrans, u32 version, u32 minor_version, |
30626f9c | 370 | rpc_authflavor_t au_flavor); |
6b7f3cf9 PT |
371 | struct nfs4_pnfs_ds_addr *nfs4_decode_mp_ds_addr(struct net *net, |
372 | struct xdr_stream *xdr, | |
373 | gfp_t gfp_flags); | |
338d00cf TH |
374 | void pnfs_layout_mark_request_commit(struct nfs_page *req, |
375 | struct pnfs_layout_segment *lseg, | |
376 | struct nfs_commit_info *cinfo, | |
377 | u32 ds_commit_idx); | |
f54bcf2e | 378 | |
40dd4b7a TM |
379 | static inline bool nfs_have_layout(struct inode *inode) |
380 | { | |
381 | return NFS_I(inode)->layout != NULL; | |
382 | } | |
383 | ||
45fcc7bc TM |
384 | static inline bool pnfs_layout_is_valid(const struct pnfs_layout_hdr *lo) |
385 | { | |
386 | return test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) == 0; | |
387 | } | |
388 | ||
30ff0603 CH |
389 | static inline struct nfs4_deviceid_node * |
390 | nfs4_get_deviceid(struct nfs4_deviceid_node *d) | |
391 | { | |
392 | atomic_inc(&d->ref); | |
393 | return d; | |
394 | } | |
395 | ||
d684d2ae | 396 | static inline struct pnfs_layout_segment * |
9369a431 | 397 | pnfs_get_lseg(struct pnfs_layout_segment *lseg) |
d684d2ae FI |
398 | { |
399 | if (lseg) { | |
400 | atomic_inc(&lseg->pls_refcount); | |
4e857c58 | 401 | smp_mb__after_atomic(); |
d684d2ae FI |
402 | } |
403 | return lseg; | |
404 | } | |
405 | ||
b20135d0 TM |
406 | static inline bool |
407 | pnfs_is_valid_lseg(struct pnfs_layout_segment *lseg) | |
408 | { | |
409 | return test_bit(NFS_LSEG_VALID, &lseg->pls_flags) != 0; | |
410 | } | |
411 | ||
e5e94017 BH |
412 | /* Return true if a layout driver is being used for this mountpoint */ |
413 | static inline int pnfs_enabled_sb(struct nfs_server *nfss) | |
414 | { | |
415 | return nfss->pnfs_curr_ld != NULL; | |
416 | } | |
85e174ba | 417 | |
a861a1e1 | 418 | static inline int |
ea2cf228 FI |
419 | pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, |
420 | struct nfs_commit_info *cinfo) | |
a861a1e1 | 421 | { |
ea2cf228 | 422 | if (cinfo->ds == NULL || cinfo->ds->ncommitting == 0) |
a861a1e1 | 423 | return PNFS_NOT_ATTEMPTED; |
ea2cf228 FI |
424 | return NFS_SERVER(inode)->pnfs_curr_ld->commit_pagelist(inode, mds_pages, how, cinfo); |
425 | } | |
426 | ||
427 | static inline struct pnfs_ds_commit_info * | |
428 | pnfs_get_ds_info(struct inode *inode) | |
429 | { | |
430 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; | |
431 | ||
432 | if (ld == NULL || ld->get_ds_info == NULL) | |
433 | return NULL; | |
434 | return ld->get_ds_info(inode); | |
a861a1e1 FI |
435 | } |
436 | ||
f54bcf2e TH |
437 | static inline void |
438 | pnfs_generic_mark_devid_invalid(struct nfs4_deviceid_node *node) | |
439 | { | |
440 | set_bit(NFS_DEVICEID_INVALID, &node->flags); | |
441 | } | |
442 | ||
8dd37758 | 443 | static inline bool |
ea2cf228 | 444 | pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, |
b57ff130 | 445 | struct nfs_commit_info *cinfo, u32 ds_commit_idx) |
a861a1e1 | 446 | { |
2b0143b5 | 447 | struct inode *inode = d_inode(req->wb_context->dentry); |
8dd37758 | 448 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; |
a861a1e1 | 449 | |
8dd37758 TM |
450 | if (lseg == NULL || ld->mark_request_commit == NULL) |
451 | return false; | |
b57ff130 | 452 | ld->mark_request_commit(req, lseg, cinfo, ds_commit_idx); |
8dd37758 | 453 | return true; |
a861a1e1 FI |
454 | } |
455 | ||
8dd37758 | 456 | static inline bool |
ea2cf228 | 457 | pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) |
a861a1e1 | 458 | { |
2b0143b5 | 459 | struct inode *inode = d_inode(req->wb_context->dentry); |
8dd37758 | 460 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; |
d6d6dc7c | 461 | |
8dd37758 TM |
462 | if (ld == NULL || ld->clear_request_commit == NULL) |
463 | return false; | |
ea2cf228 | 464 | ld->clear_request_commit(req, cinfo); |
8dd37758 | 465 | return true; |
d6d6dc7c FI |
466 | } |
467 | ||
468 | static inline int | |
ea2cf228 FI |
469 | pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, |
470 | int max) | |
d6d6dc7c | 471 | { |
ea2cf228 | 472 | if (cinfo->ds == NULL || cinfo->ds->nwritten == 0) |
d6d6dc7c | 473 | return 0; |
ea2cf228 FI |
474 | else |
475 | return NFS_SERVER(inode)->pnfs_curr_ld->scan_commit_lists(cinfo, max); | |
a861a1e1 FI |
476 | } |
477 | ||
02d1426c WAA |
478 | static inline struct nfs_page * |
479 | pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo, | |
480 | struct page *page) | |
481 | { | |
482 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; | |
483 | ||
484 | if (ld == NULL || ld->search_commit_reqs == NULL) | |
485 | return NULL; | |
486 | return ld->search_commit_reqs(cinfo, page); | |
487 | } | |
488 | ||
8a1636c4 BH |
489 | /* Should the pNFS client commit and return the layout upon a setattr */ |
490 | static inline bool | |
491 | pnfs_ld_layoutret_on_setattr(struct inode *inode) | |
492 | { | |
493 | if (!pnfs_enabled_sb(NFS_SERVER(inode))) | |
494 | return false; | |
495 | return NFS_SERVER(inode)->pnfs_curr_ld->flags & | |
496 | PNFS_LAYOUTRET_ON_SETATTR; | |
497 | } | |
498 | ||
612aa983 CH |
499 | static inline bool |
500 | pnfs_ld_read_whole_page(struct inode *inode) | |
501 | { | |
502 | if (!pnfs_enabled_sb(NFS_SERVER(inode))) | |
503 | return false; | |
504 | return NFS_SERVER(inode)->pnfs_curr_ld->flags & PNFS_READ_WHOLE_PAGE; | |
505 | } | |
506 | ||
5bb89b47 TM |
507 | static inline int |
508 | pnfs_sync_inode(struct inode *inode, bool datasync) | |
509 | { | |
510 | if (!pnfs_enabled_sb(NFS_SERVER(inode))) | |
511 | return 0; | |
512 | return NFS_SERVER(inode)->pnfs_curr_ld->sync(inode, datasync); | |
513 | } | |
514 | ||
d8c951c3 TM |
515 | static inline bool |
516 | pnfs_layoutcommit_outstanding(struct inode *inode) | |
517 | { | |
518 | struct nfs_inode *nfsi = NFS_I(inode); | |
519 | ||
520 | return test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags) != 0 || | |
521 | test_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags) != 0; | |
522 | } | |
523 | ||
cbe82603 BH |
524 | static inline int pnfs_return_layout(struct inode *ino) |
525 | { | |
526 | struct nfs_inode *nfsi = NFS_I(ino); | |
527 | struct nfs_server *nfss = NFS_SERVER(ino); | |
528 | ||
529 | if (pnfs_enabled_sb(nfss) && nfsi->layout) | |
530 | return _pnfs_return_layout(ino); | |
531 | ||
532 | return 0; | |
533 | } | |
534 | ||
82be417a AA |
535 | static inline bool |
536 | pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, | |
537 | struct nfs_server *nfss) | |
538 | { | |
fb47ddc9 | 539 | return (dst && src && src->bm != 0 && nfss->pnfs_curr_ld && |
82be417a AA |
540 | nfss->pnfs_curr_ld->id == src->l_type); |
541 | } | |
542 | ||
0762ed2c TM |
543 | static inline u64 |
544 | pnfs_calc_offset_end(u64 offset, u64 len) | |
545 | { | |
546 | if (len == NFS4_MAX_UINT64 || len >= NFS4_MAX_UINT64 - offset) | |
547 | return NFS4_MAX_UINT64; | |
548 | return offset + len - 1; | |
549 | } | |
550 | ||
551 | static inline u64 | |
552 | pnfs_calc_offset_length(u64 offset, u64 end) | |
553 | { | |
554 | if (end == NFS4_MAX_UINT64 || end <= offset) | |
555 | return NFS4_MAX_UINT64; | |
556 | return 1 + end - offset; | |
557 | } | |
558 | ||
e144e539 TM |
559 | static inline void |
560 | pnfs_copy_range(struct pnfs_layout_range *dst, | |
561 | const struct pnfs_layout_range *src) | |
562 | { | |
563 | memcpy(dst, src, sizeof(*dst)); | |
564 | } | |
565 | ||
17822b20 TM |
566 | static inline u64 |
567 | pnfs_end_offset(u64 start, u64 len) | |
568 | { | |
569 | if (NFS4_MAX_UINT64 - start <= len) | |
570 | return NFS4_MAX_UINT64; | |
571 | return start + len; | |
572 | } | |
573 | ||
574 | /* | |
575 | * Are 2 ranges intersecting? | |
576 | * start1 end1 | |
577 | * [----------------------------------) | |
578 | * start2 end2 | |
579 | * [----------------) | |
580 | */ | |
581 | static inline bool | |
582 | pnfs_is_range_intersecting(u64 start1, u64 end1, u64 start2, u64 end2) | |
583 | { | |
584 | return (end1 == NFS4_MAX_UINT64 || start2 < end1) && | |
585 | (end2 == NFS4_MAX_UINT64 || start1 < end2); | |
586 | } | |
587 | ||
588 | static inline bool | |
589 | pnfs_lseg_range_intersecting(const struct pnfs_layout_range *l1, | |
590 | const struct pnfs_layout_range *l2) | |
591 | { | |
592 | u64 end1 = pnfs_end_offset(l1->offset, l1->length); | |
593 | u64 end2 = pnfs_end_offset(l2->offset, l2->length); | |
594 | ||
595 | return pnfs_is_range_intersecting(l1->offset, end1, l2->offset, end2); | |
596 | } | |
597 | ||
bbf58bf3 TM |
598 | extern unsigned int layoutstats_timer; |
599 | ||
6f00866d TM |
600 | #ifdef NFS_DEBUG |
601 | void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id); | |
602 | #else | |
603 | static inline void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id) | |
604 | { | |
605 | } | |
bbf58bf3 | 606 | |
6f00866d | 607 | #endif /* NFS_DEBUG */ |
85e174ba RL |
608 | #else /* CONFIG_NFS_V4_1 */ |
609 | ||
40dd4b7a TM |
610 | static inline bool nfs_have_layout(struct inode *inode) |
611 | { | |
612 | return false; | |
613 | } | |
614 | ||
974cec8c AA |
615 | static inline void pnfs_destroy_all_layouts(struct nfs_client *clp) |
616 | { | |
617 | } | |
618 | ||
e5e94017 BH |
619 | static inline void pnfs_destroy_layout(struct nfs_inode *nfsi) |
620 | { | |
621 | } | |
622 | ||
d684d2ae | 623 | static inline struct pnfs_layout_segment * |
9369a431 | 624 | pnfs_get_lseg(struct pnfs_layout_segment *lseg) |
d684d2ae FI |
625 | { |
626 | return NULL; | |
627 | } | |
628 | ||
9369a431 | 629 | static inline void pnfs_put_lseg(struct pnfs_layout_segment *lseg) |
d684d2ae FI |
630 | { |
631 | } | |
632 | ||
cbe82603 BH |
633 | static inline int pnfs_return_layout(struct inode *ino) |
634 | { | |
635 | return 0; | |
636 | } | |
637 | ||
24028672 TM |
638 | static inline int pnfs_commit_and_return_layout(struct inode *inode) |
639 | { | |
640 | return 0; | |
641 | } | |
642 | ||
8a1636c4 BH |
643 | static inline bool |
644 | pnfs_ld_layoutret_on_setattr(struct inode *inode) | |
645 | { | |
646 | return false; | |
647 | } | |
648 | ||
612aa983 CH |
649 | static inline bool |
650 | pnfs_ld_read_whole_page(struct inode *inode) | |
651 | { | |
652 | return false; | |
653 | } | |
654 | ||
5bb89b47 TM |
655 | static inline int |
656 | pnfs_sync_inode(struct inode *inode, bool datasync) | |
657 | { | |
658 | return 0; | |
659 | } | |
660 | ||
10b7e9ad TM |
661 | static inline bool |
662 | pnfs_layoutcommit_outstanding(struct inode *inode) | |
663 | { | |
664 | return false; | |
665 | } | |
666 | ||
667 | ||
f7e8917a FI |
668 | static inline bool |
669 | pnfs_roc(struct inode *ino) | |
670 | { | |
671 | return false; | |
672 | } | |
673 | ||
674 | static inline void | |
675 | pnfs_roc_release(struct inode *ino) | |
676 | { | |
677 | } | |
678 | ||
679 | static inline void | |
680 | pnfs_roc_set_barrier(struct inode *ino, u32 barrier) | |
681 | { | |
682 | } | |
683 | ||
4ff376fe TM |
684 | static inline void |
685 | pnfs_roc_get_barrier(struct inode *ino, u32 *barrier) | |
f7e8917a | 686 | { |
f7e8917a FI |
687 | } |
688 | ||
500d701f PT |
689 | static inline bool |
690 | pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task) | |
691 | { | |
692 | return false; | |
693 | } | |
694 | ||
738fd0f3 | 695 | static inline void set_pnfs_layoutdriver(struct nfs_server *s, |
ca440c38 JL |
696 | const struct nfs_fh *mntfh, |
697 | struct nfs_fsinfo *fsinfo) | |
85e174ba RL |
698 | { |
699 | } | |
700 | ||
701 | static inline void unset_pnfs_layoutdriver(struct nfs_server *s) | |
702 | { | |
703 | } | |
704 | ||
a861a1e1 | 705 | static inline int |
ea2cf228 FI |
706 | pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, |
707 | struct nfs_commit_info *cinfo) | |
a861a1e1 FI |
708 | { |
709 | return PNFS_NOT_ATTEMPTED; | |
710 | } | |
711 | ||
ea2cf228 FI |
712 | static inline struct pnfs_ds_commit_info * |
713 | pnfs_get_ds_info(struct inode *inode) | |
714 | { | |
715 | return NULL; | |
716 | } | |
717 | ||
8dd37758 | 718 | static inline bool |
ea2cf228 | 719 | pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, |
b57ff130 | 720 | struct nfs_commit_info *cinfo, u32 ds_commit_idx) |
a861a1e1 | 721 | { |
8dd37758 | 722 | return false; |
a861a1e1 FI |
723 | } |
724 | ||
8dd37758 | 725 | static inline bool |
ea2cf228 | 726 | pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) |
a861a1e1 | 727 | { |
8dd37758 | 728 | return false; |
d6d6dc7c FI |
729 | } |
730 | ||
731 | static inline int | |
ea2cf228 FI |
732 | pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, |
733 | int max) | |
d6d6dc7c FI |
734 | { |
735 | return 0; | |
a861a1e1 FI |
736 | } |
737 | ||
02d1426c WAA |
738 | static inline struct nfs_page * |
739 | pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo, | |
740 | struct page *page) | |
741 | { | |
742 | return NULL; | |
743 | } | |
744 | ||
ef311537 | 745 | static inline int pnfs_layoutcommit_inode(struct inode *inode, bool sync) |
863a3c6c AA |
746 | { |
747 | return 0; | |
748 | } | |
1775bc34 | 749 | |
82be417a AA |
750 | static inline bool |
751 | pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, | |
752 | struct nfs_server *nfss) | |
753 | { | |
754 | return false; | |
755 | } | |
756 | ||
757 | static inline struct nfs4_threshold *pnfs_mdsthreshold_alloc(void) | |
758 | { | |
759 | return NULL; | |
760 | } | |
761 | ||
5f01d953 PT |
762 | static inline void nfs4_pnfs_v3_ds_connect_unload(void) |
763 | { | |
764 | } | |
765 | ||
85e174ba RL |
766 | #endif /* CONFIG_NFS_V4_1 */ |
767 | ||
865a7ecb | 768 | #if IS_ENABLED(CONFIG_NFS_V4_2) |
c8ad8894 | 769 | int pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags); |
865a7ecb PT |
770 | #else |
771 | static inline int | |
c8ad8894 | 772 | pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags) |
865a7ecb PT |
773 | { |
774 | return 0; | |
775 | } | |
776 | #endif | |
777 | ||
85e174ba | 778 | #endif /* FS_NFS_PNFS_H */ |