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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 */ | |
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 FI |
66 | atomic_t pls_refcount; |
67 | unsigned long pls_flags; | |
566052c5 | 68 | struct pnfs_layout_hdr *pls_layout; |
e6cf82d1 | 69 | struct work_struct pls_work; |
974cec8c AA |
70 | }; |
71 | ||
64419a9b AA |
72 | enum pnfs_try_status { |
73 | PNFS_ATTEMPTED = 0, | |
74 | PNFS_NOT_ATTEMPTED = 1, | |
ceb11e13 | 75 | PNFS_TRY_AGAIN = 2, |
64419a9b AA |
76 | }; |
77 | ||
85e174ba RL |
78 | #ifdef CONFIG_NFS_V4_1 |
79 | ||
80 | #define LAYOUT_NFSV4_1_MODULE_PREFIX "nfs-layouttype4" | |
81 | ||
39280a5a PT |
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 | ||
e5e94017 BH |
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 */ | |
43f1b3da | 96 | NFS_LAYOUT_BULK_RECALL, /* bulk recall affecting layout */ |
f7e8917a | 97 | NFS_LAYOUT_ROC, /* some lseg had roc bit set */ |
d527e5c1 | 98 | NFS_LAYOUT_RETURN, /* Return this layout ASAP */ |
193e3aa2 | 99 | NFS_LAYOUT_RETURN_BEFORE_CLOSE, /* Return this layout before close */ |
47abadef | 100 | NFS_LAYOUT_INVALID_STID, /* layout stateid id is invalid */ |
9bf87482 | 101 | NFS_LAYOUT_FIRST_LAYOUTGET, /* Serialize first layoutget */ |
c829013d | 102 | NFS_LAYOUT_RETRY_LAYOUTGET, /* Retry 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); |
94ad1c80 | 132 | |
c88953d8 CH |
133 | void (*return_range) (struct pnfs_layout_hdr *lo, |
134 | struct pnfs_layout_range *range); | |
135 | ||
94ad1c80 | 136 | /* test for nfs page cache coalescing */ |
1751c363 TM |
137 | const struct nfs_pageio_ops *pg_read_ops; |
138 | const struct nfs_pageio_ops *pg_write_ops; | |
64419a9b | 139 | |
ea2cf228 | 140 | struct pnfs_ds_commit_info *(*get_ds_info) (struct inode *inode); |
8dd37758 | 141 | void (*mark_request_commit) (struct nfs_page *req, |
ea2cf228 | 142 | struct pnfs_layout_segment *lseg, |
b57ff130 WAA |
143 | struct nfs_commit_info *cinfo, |
144 | u32 ds_commit_idx); | |
ea2cf228 FI |
145 | void (*clear_request_commit) (struct nfs_page *req, |
146 | struct nfs_commit_info *cinfo); | |
147 | int (*scan_commit_lists) (struct nfs_commit_info *cinfo, | |
148 | int max); | |
1763da12 FI |
149 | void (*recover_commit_reqs) (struct list_head *list, |
150 | struct nfs_commit_info *cinfo); | |
02d1426c WAA |
151 | struct nfs_page * (*search_commit_reqs)(struct nfs_commit_info *cinfo, |
152 | struct page *page); | |
ea2cf228 FI |
153 | int (*commit_pagelist)(struct inode *inode, |
154 | struct list_head *mds_pages, | |
155 | int how, | |
156 | struct nfs_commit_info *cinfo); | |
a861a1e1 | 157 | |
64419a9b AA |
158 | /* |
159 | * Return PNFS_ATTEMPTED to indicate the layout code has attempted | |
160 | * I/O, else return PNFS_NOT_ATTEMPTED to fall back to normal NFS | |
161 | */ | |
d45f60c6 WAA |
162 | enum pnfs_try_status (*read_pagelist)(struct nfs_pgio_header *); |
163 | enum pnfs_try_status (*write_pagelist)(struct nfs_pgio_header *, int); | |
1775bc34 BH |
164 | |
165 | void (*free_deviceid_node) (struct nfs4_deviceid_node *); | |
661373b1 CH |
166 | struct nfs4_deviceid_node * (*alloc_deviceid_node) |
167 | (struct nfs_server *server, struct pnfs_device *pdev, | |
168 | gfp_t gfp_flags); | |
04a55549 AA |
169 | |
170 | void (*encode_layoutreturn) (struct pnfs_layout_hdr *layoutid, | |
171 | struct xdr_stream *xdr, | |
172 | const struct nfs4_layoutreturn_args *args); | |
ac7db726 | 173 | |
db29c089 | 174 | void (*cleanup_layoutcommit) (struct nfs4_layoutcommit_data *data); |
5f919c9f CH |
175 | int (*prepare_layoutcommit) (struct nfs4_layoutcommit_args *args); |
176 | void (*encode_layoutcommit) (struct pnfs_layout_hdr *lo, | |
ac7db726 BH |
177 | struct xdr_stream *xdr, |
178 | const struct nfs4_layoutcommit_args *args); | |
85e174ba RL |
179 | }; |
180 | ||
e5e94017 | 181 | struct pnfs_layout_hdr { |
cc6e5340 | 182 | atomic_t plh_refcount; |
b7edfaa1 | 183 | struct list_head plh_layouts; /* other client layouts */ |
fd9a8d71 | 184 | struct list_head plh_bulk_destroy; |
b7edfaa1 | 185 | struct list_head plh_segs; /* layout segments list */ |
b7edfaa1 | 186 | nfs4_stateid plh_stateid; |
cf7d63f1 | 187 | atomic_t plh_outstanding; /* number of RPCs out */ |
f7e8917a | 188 | unsigned long plh_block_lgets; /* block LAYOUTGET if >0 */ |
43f1b3da | 189 | u32 plh_barrier; /* ignore lower seqids */ |
25c75333 | 190 | unsigned long plh_retry_timestamp; |
566052c5 | 191 | unsigned long plh_flags; |
016256df | 192 | enum pnfs_iomode plh_return_iomode; |
acff5880 | 193 | loff_t plh_lwb; /* last write byte for layoutcommit */ |
9fa40758 | 194 | struct rpc_cred *plh_lc_cred; /* layoutcommit cred */ |
b7edfaa1 | 195 | struct inode *plh_inode; |
e5e94017 BH |
196 | }; |
197 | ||
b1f69b75 AA |
198 | struct pnfs_device { |
199 | struct nfs4_deviceid dev_id; | |
200 | unsigned int layout_type; | |
201 | unsigned int mincount; | |
f1c097be | 202 | unsigned int maxcount; /* gdia_maxcount */ |
b1f69b75 | 203 | struct page **pages; |
b1f69b75 | 204 | unsigned int pgbase; |
f1c097be | 205 | unsigned int pglen; /* reply buffer length */ |
b1f69b75 AA |
206 | }; |
207 | ||
7f11d8d3 AA |
208 | #define NFS4_PNFS_GETDEVLIST_MAXNUM 16 |
209 | ||
210 | struct pnfs_devicelist { | |
211 | unsigned int eof; | |
212 | unsigned int num_devs; | |
213 | struct nfs4_deviceid dev_id[NFS4_PNFS_GETDEVLIST_MAXNUM]; | |
214 | }; | |
215 | ||
02c35fca FI |
216 | extern int pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *); |
217 | extern void pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *); | |
218 | ||
b1f69b75 AA |
219 | /* nfs4proc.c */ |
220 | extern int nfs4_proc_getdeviceinfo(struct nfs_server *server, | |
cd5875fe TM |
221 | struct pnfs_device *dev, |
222 | struct rpc_cred *cred); | |
a0b0a6e3 | 223 | extern struct pnfs_layout_segment* nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags); |
6c16605d | 224 | extern int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync); |
b1f69b75 AA |
225 | |
226 | /* pnfs.c */ | |
70c3bd2b | 227 | void pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo); |
9369a431 | 228 | void pnfs_put_lseg(struct pnfs_layout_segment *lseg); |
6543f803 | 229 | void pnfs_put_lseg_locked(struct pnfs_layout_segment *lseg); |
1751c363 | 230 | |
738fd0f3 | 231 | void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, u32); |
85e174ba | 232 | void unset_pnfs_layoutdriver(struct nfs_server *); |
d8007d4d | 233 | void pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *, struct nfs_page *); |
493292dd | 234 | int pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc); |
6296556f PT |
235 | void pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio, |
236 | struct nfs_page *req, u64 wb_size); | |
180bb5ec | 237 | void pnfs_generic_pg_cleanup(struct nfs_pageio_descriptor *); |
dce81290 | 238 | int pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc); |
b4fdac1a WAA |
239 | size_t pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, |
240 | struct nfs_page *prev, struct nfs_page *req); | |
1b0ae068 | 241 | void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg); |
a0b0a6e3 | 242 | struct pnfs_layout_segment *pnfs_layout_process(struct nfs4_layoutget *lgp); |
43f1b3da | 243 | void pnfs_free_lseg_list(struct list_head *tmp_list); |
e5e94017 | 244 | void pnfs_destroy_layout(struct nfs_inode *); |
974cec8c | 245 | void pnfs_destroy_all_layouts(struct nfs_client *); |
fd9a8d71 TM |
246 | int pnfs_destroy_layouts_byfsid(struct nfs_client *clp, |
247 | struct nfs_fsid *fsid, | |
248 | bool is_recall); | |
249 | int pnfs_destroy_layouts_byclid(struct nfs_client *clp, | |
250 | bool is_recall); | |
70c3bd2b | 251 | void pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo); |
43f1b3da FI |
252 | void pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, |
253 | const nfs4_stateid *new, | |
254 | bool update_barrier); | |
fd6002e9 FI |
255 | int pnfs_choose_layoutget_stateid(nfs4_stateid *dst, |
256 | struct pnfs_layout_hdr *lo, | |
ce6ab4f2 | 257 | struct pnfs_layout_range *range, |
fd6002e9 | 258 | struct nfs4_state *open_state); |
49a85061 | 259 | int pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, |
43f1b3da | 260 | struct list_head *tmp_list, |
778b5502 | 261 | struct pnfs_layout_range *recall_range); |
f7e8917a FI |
262 | bool pnfs_roc(struct inode *ino); |
263 | void pnfs_roc_release(struct inode *ino); | |
264 | void pnfs_roc_set_barrier(struct inode *ino, u32 barrier); | |
7fdab069 | 265 | bool pnfs_roc_drain(struct inode *ino, u32 *barrier, struct rpc_task *task); |
d45f60c6 | 266 | void pnfs_set_layoutcommit(struct nfs_pgio_header *); |
378520b8 | 267 | void pnfs_commit_set_layoutcommit(struct nfs_commit_data *data); |
db29c089 | 268 | void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data); |
ef311537 | 269 | int pnfs_layoutcommit_inode(struct inode *inode, bool sync); |
cbe82603 | 270 | int _pnfs_return_layout(struct inode *); |
24028672 | 271 | int pnfs_commit_and_return_layout(struct inode *); |
d45f60c6 WAA |
272 | void pnfs_ld_write_done(struct nfs_pgio_header *); |
273 | void pnfs_ld_read_done(struct nfs_pgio_header *); | |
ceb11e13 | 274 | int pnfs_read_resend_pnfs(struct nfs_pgio_header *); |
7c24d948 AA |
275 | struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino, |
276 | struct nfs_open_context *ctx, | |
277 | loff_t pos, | |
278 | u64 count, | |
279 | enum pnfs_iomode iomode, | |
280 | gfp_t gfp_flags); | |
e5e94017 | 281 | |
c47abcf8 | 282 | void nfs4_deviceid_mark_client_invalid(struct nfs_client *clp); |
53113ad3 WAA |
283 | int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *); |
284 | int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *); | |
82be417a | 285 | struct nfs4_threshold *pnfs_mdsthreshold_alloc(void); |
016256df PT |
286 | void pnfs_error_mark_layout_for_return(struct inode *inode, |
287 | struct pnfs_layout_segment *lseg); | |
c47abcf8 AA |
288 | |
289 | /* nfs4_deviceid_flags */ | |
290 | enum { | |
291 | NFS_DEVICEID_INVALID = 0, /* set when MDS clientid recalled */ | |
1dfed273 | 292 | NFS_DEVICEID_UNAVAILABLE, /* device temporarily unavailable */ |
c47abcf8 AA |
293 | }; |
294 | ||
a1eaecbc BH |
295 | /* pnfs_dev.c */ |
296 | struct nfs4_deviceid_node { | |
297 | struct hlist_node node; | |
9e3bd4e2 | 298 | struct hlist_node tmpnode; |
1775bc34 | 299 | const struct pnfs_layoutdriver_type *ld; |
a1eaecbc | 300 | const struct nfs_client *nfs_client; |
c47abcf8 | 301 | unsigned long flags; |
1dfed273 | 302 | unsigned long timestamp_unavailable; |
a1eaecbc BH |
303 | struct nfs4_deviceid deviceid; |
304 | atomic_t ref; | |
305 | }; | |
306 | ||
661373b1 CH |
307 | struct nfs4_deviceid_node * |
308 | nfs4_find_get_deviceid(struct nfs_server *server, | |
309 | const struct nfs4_deviceid *id, struct rpc_cred *cred, | |
310 | gfp_t gfp_mask); | |
35c8bb54 | 311 | void nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *); |
661373b1 | 312 | void nfs4_init_deviceid_node(struct nfs4_deviceid_node *, struct nfs_server *, |
a1eaecbc | 313 | const struct nfs4_deviceid *); |
a1eaecbc | 314 | bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *); |
1dfed273 TM |
315 | void nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node); |
316 | bool nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node); | |
1775bc34 | 317 | void nfs4_deviceid_purge_client(const struct nfs_client *); |
a1eaecbc | 318 | |
f54bcf2e TH |
319 | /* pnfs_nfs.c */ |
320 | void pnfs_generic_clear_request_commit(struct nfs_page *req, | |
321 | struct nfs_commit_info *cinfo); | |
322 | void pnfs_generic_commit_release(void *calldata); | |
323 | void pnfs_generic_prepare_to_resend_writes(struct nfs_commit_data *data); | |
324 | void pnfs_generic_rw_release(void *data); | |
325 | void pnfs_generic_recover_commit_reqs(struct list_head *dst, | |
326 | struct nfs_commit_info *cinfo); | |
327 | int pnfs_generic_commit_pagelist(struct inode *inode, | |
328 | struct list_head *mds_pages, | |
329 | int how, | |
330 | struct nfs_commit_info *cinfo, | |
331 | int (*initiate_commit)(struct nfs_commit_data *data, | |
332 | int how)); | |
333 | int pnfs_generic_scan_commit_lists(struct nfs_commit_info *cinfo, int max); | |
334 | void pnfs_generic_write_commit_done(struct rpc_task *task, void *data); | |
875ae069 PT |
335 | void nfs4_pnfs_ds_put(struct nfs4_pnfs_ds *ds); |
336 | struct nfs4_pnfs_ds *nfs4_pnfs_ds_add(struct list_head *dsaddrs, | |
337 | gfp_t gfp_flags); | |
5f01d953 | 338 | void nfs4_pnfs_v3_ds_connect_unload(void); |
7405f9e1 PT |
339 | void nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds, |
340 | struct nfs4_deviceid_node *devid, unsigned int timeo, | |
5f01d953 | 341 | unsigned int retrans, u32 version, u32 minor_version, |
30626f9c | 342 | rpc_authflavor_t au_flavor); |
6b7f3cf9 PT |
343 | struct nfs4_pnfs_ds_addr *nfs4_decode_mp_ds_addr(struct net *net, |
344 | struct xdr_stream *xdr, | |
345 | gfp_t gfp_flags); | |
f54bcf2e | 346 | |
30ff0603 CH |
347 | static inline struct nfs4_deviceid_node * |
348 | nfs4_get_deviceid(struct nfs4_deviceid_node *d) | |
349 | { | |
350 | atomic_inc(&d->ref); | |
351 | return d; | |
352 | } | |
353 | ||
c829013d PT |
354 | static inline void pnfs_set_retry_layoutget(struct pnfs_layout_hdr *lo) |
355 | { | |
356 | if (!test_and_set_bit(NFS_LAYOUT_RETRY_LAYOUTGET, &lo->plh_flags)) | |
357 | atomic_inc(&lo->plh_refcount); | |
358 | } | |
359 | ||
360 | static inline void pnfs_clear_retry_layoutget(struct pnfs_layout_hdr *lo) | |
361 | { | |
aa8a45ee | 362 | if (test_and_clear_bit(NFS_LAYOUT_RETRY_LAYOUTGET, &lo->plh_flags)) { |
c829013d | 363 | atomic_dec(&lo->plh_refcount); |
aa8a45ee PT |
364 | /* wake up waiters for LAYOUTRETURN as that is not needed */ |
365 | wake_up_bit(&lo->plh_flags, NFS_LAYOUT_RETURN); | |
366 | } | |
c829013d PT |
367 | } |
368 | ||
369 | static inline bool pnfs_should_retry_layoutget(struct pnfs_layout_hdr *lo) | |
370 | { | |
371 | return test_bit(NFS_LAYOUT_RETRY_LAYOUTGET, &lo->plh_flags); | |
372 | } | |
373 | ||
d684d2ae | 374 | static inline struct pnfs_layout_segment * |
9369a431 | 375 | pnfs_get_lseg(struct pnfs_layout_segment *lseg) |
d684d2ae FI |
376 | { |
377 | if (lseg) { | |
378 | atomic_inc(&lseg->pls_refcount); | |
4e857c58 | 379 | smp_mb__after_atomic(); |
d684d2ae FI |
380 | } |
381 | return lseg; | |
382 | } | |
383 | ||
e5e94017 BH |
384 | /* Return true if a layout driver is being used for this mountpoint */ |
385 | static inline int pnfs_enabled_sb(struct nfs_server *nfss) | |
386 | { | |
387 | return nfss->pnfs_curr_ld != NULL; | |
388 | } | |
85e174ba | 389 | |
a861a1e1 | 390 | static inline int |
ea2cf228 FI |
391 | pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, |
392 | struct nfs_commit_info *cinfo) | |
a861a1e1 | 393 | { |
ea2cf228 | 394 | if (cinfo->ds == NULL || cinfo->ds->ncommitting == 0) |
a861a1e1 | 395 | return PNFS_NOT_ATTEMPTED; |
ea2cf228 FI |
396 | return NFS_SERVER(inode)->pnfs_curr_ld->commit_pagelist(inode, mds_pages, how, cinfo); |
397 | } | |
398 | ||
399 | static inline struct pnfs_ds_commit_info * | |
400 | pnfs_get_ds_info(struct inode *inode) | |
401 | { | |
402 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; | |
403 | ||
404 | if (ld == NULL || ld->get_ds_info == NULL) | |
405 | return NULL; | |
406 | return ld->get_ds_info(inode); | |
a861a1e1 FI |
407 | } |
408 | ||
f54bcf2e TH |
409 | static inline void |
410 | pnfs_generic_mark_devid_invalid(struct nfs4_deviceid_node *node) | |
411 | { | |
412 | set_bit(NFS_DEVICEID_INVALID, &node->flags); | |
413 | } | |
414 | ||
8dd37758 | 415 | static inline bool |
ea2cf228 | 416 | pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, |
b57ff130 | 417 | struct nfs_commit_info *cinfo, u32 ds_commit_idx) |
a861a1e1 | 418 | { |
d6d6dc7c | 419 | struct inode *inode = req->wb_context->dentry->d_inode; |
8dd37758 | 420 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; |
a861a1e1 | 421 | |
8dd37758 TM |
422 | if (lseg == NULL || ld->mark_request_commit == NULL) |
423 | return false; | |
b57ff130 | 424 | ld->mark_request_commit(req, lseg, cinfo, ds_commit_idx); |
8dd37758 | 425 | return true; |
a861a1e1 FI |
426 | } |
427 | ||
8dd37758 | 428 | static inline bool |
ea2cf228 | 429 | pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) |
a861a1e1 | 430 | { |
d6d6dc7c | 431 | struct inode *inode = req->wb_context->dentry->d_inode; |
8dd37758 | 432 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; |
d6d6dc7c | 433 | |
8dd37758 TM |
434 | if (ld == NULL || ld->clear_request_commit == NULL) |
435 | return false; | |
ea2cf228 | 436 | ld->clear_request_commit(req, cinfo); |
8dd37758 | 437 | return true; |
d6d6dc7c FI |
438 | } |
439 | ||
440 | static inline int | |
ea2cf228 FI |
441 | pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, |
442 | int max) | |
d6d6dc7c | 443 | { |
ea2cf228 | 444 | if (cinfo->ds == NULL || cinfo->ds->nwritten == 0) |
d6d6dc7c | 445 | return 0; |
ea2cf228 FI |
446 | else |
447 | return NFS_SERVER(inode)->pnfs_curr_ld->scan_commit_lists(cinfo, max); | |
a861a1e1 FI |
448 | } |
449 | ||
02d1426c WAA |
450 | static inline struct nfs_page * |
451 | pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo, | |
452 | struct page *page) | |
453 | { | |
454 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; | |
455 | ||
456 | if (ld == NULL || ld->search_commit_reqs == NULL) | |
457 | return NULL; | |
458 | return ld->search_commit_reqs(cinfo, page); | |
459 | } | |
460 | ||
8a1636c4 BH |
461 | /* Should the pNFS client commit and return the layout upon a setattr */ |
462 | static inline bool | |
463 | pnfs_ld_layoutret_on_setattr(struct inode *inode) | |
464 | { | |
465 | if (!pnfs_enabled_sb(NFS_SERVER(inode))) | |
466 | return false; | |
467 | return NFS_SERVER(inode)->pnfs_curr_ld->flags & | |
468 | PNFS_LAYOUTRET_ON_SETATTR; | |
469 | } | |
470 | ||
612aa983 CH |
471 | static inline bool |
472 | pnfs_ld_read_whole_page(struct inode *inode) | |
473 | { | |
474 | if (!pnfs_enabled_sb(NFS_SERVER(inode))) | |
475 | return false; | |
476 | return NFS_SERVER(inode)->pnfs_curr_ld->flags & PNFS_READ_WHOLE_PAGE; | |
477 | } | |
478 | ||
d8c951c3 TM |
479 | static inline bool |
480 | pnfs_layoutcommit_outstanding(struct inode *inode) | |
481 | { | |
482 | struct nfs_inode *nfsi = NFS_I(inode); | |
483 | ||
484 | return test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags) != 0 || | |
485 | test_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags) != 0; | |
486 | } | |
487 | ||
cbe82603 BH |
488 | static inline int pnfs_return_layout(struct inode *ino) |
489 | { | |
490 | struct nfs_inode *nfsi = NFS_I(ino); | |
491 | struct nfs_server *nfss = NFS_SERVER(ino); | |
492 | ||
493 | if (pnfs_enabled_sb(nfss) && nfsi->layout) | |
494 | return _pnfs_return_layout(ino); | |
495 | ||
496 | return 0; | |
497 | } | |
498 | ||
82be417a AA |
499 | static inline bool |
500 | pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, | |
501 | struct nfs_server *nfss) | |
502 | { | |
fb47ddc9 | 503 | return (dst && src && src->bm != 0 && nfss->pnfs_curr_ld && |
82be417a AA |
504 | nfss->pnfs_curr_ld->id == src->l_type); |
505 | } | |
506 | ||
6f00866d TM |
507 | #ifdef NFS_DEBUG |
508 | void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id); | |
509 | #else | |
510 | static inline void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id) | |
511 | { | |
512 | } | |
513 | #endif /* NFS_DEBUG */ | |
85e174ba RL |
514 | #else /* CONFIG_NFS_V4_1 */ |
515 | ||
974cec8c AA |
516 | static inline void pnfs_destroy_all_layouts(struct nfs_client *clp) |
517 | { | |
518 | } | |
519 | ||
e5e94017 BH |
520 | static inline void pnfs_destroy_layout(struct nfs_inode *nfsi) |
521 | { | |
522 | } | |
523 | ||
d684d2ae | 524 | static inline struct pnfs_layout_segment * |
9369a431 | 525 | pnfs_get_lseg(struct pnfs_layout_segment *lseg) |
d684d2ae FI |
526 | { |
527 | return NULL; | |
528 | } | |
529 | ||
9369a431 | 530 | static inline void pnfs_put_lseg(struct pnfs_layout_segment *lseg) |
d684d2ae FI |
531 | { |
532 | } | |
533 | ||
cbe82603 BH |
534 | static inline int pnfs_return_layout(struct inode *ino) |
535 | { | |
536 | return 0; | |
537 | } | |
538 | ||
24028672 TM |
539 | static inline int pnfs_commit_and_return_layout(struct inode *inode) |
540 | { | |
541 | return 0; | |
542 | } | |
543 | ||
8a1636c4 BH |
544 | static inline bool |
545 | pnfs_ld_layoutret_on_setattr(struct inode *inode) | |
546 | { | |
547 | return false; | |
548 | } | |
549 | ||
612aa983 CH |
550 | static inline bool |
551 | pnfs_ld_read_whole_page(struct inode *inode) | |
552 | { | |
553 | return false; | |
554 | } | |
555 | ||
f7e8917a FI |
556 | static inline bool |
557 | pnfs_roc(struct inode *ino) | |
558 | { | |
559 | return false; | |
560 | } | |
561 | ||
562 | static inline void | |
563 | pnfs_roc_release(struct inode *ino) | |
564 | { | |
565 | } | |
566 | ||
567 | static inline void | |
568 | pnfs_roc_set_barrier(struct inode *ino, u32 barrier) | |
569 | { | |
570 | } | |
571 | ||
572 | static inline bool | |
7fdab069 | 573 | pnfs_roc_drain(struct inode *ino, u32 *barrier, struct rpc_task *task) |
f7e8917a FI |
574 | { |
575 | return false; | |
576 | } | |
577 | ||
738fd0f3 | 578 | static inline void set_pnfs_layoutdriver(struct nfs_server *s, |
a00ed25c | 579 | const struct nfs_fh *mntfh, u32 id) |
85e174ba RL |
580 | { |
581 | } | |
582 | ||
583 | static inline void unset_pnfs_layoutdriver(struct nfs_server *s) | |
584 | { | |
585 | } | |
586 | ||
a861a1e1 | 587 | static inline int |
ea2cf228 FI |
588 | pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, |
589 | struct nfs_commit_info *cinfo) | |
a861a1e1 FI |
590 | { |
591 | return PNFS_NOT_ATTEMPTED; | |
592 | } | |
593 | ||
ea2cf228 FI |
594 | static inline struct pnfs_ds_commit_info * |
595 | pnfs_get_ds_info(struct inode *inode) | |
596 | { | |
597 | return NULL; | |
598 | } | |
599 | ||
8dd37758 | 600 | static inline bool |
ea2cf228 | 601 | pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, |
b57ff130 | 602 | struct nfs_commit_info *cinfo, u32 ds_commit_idx) |
a861a1e1 | 603 | { |
8dd37758 | 604 | return false; |
a861a1e1 FI |
605 | } |
606 | ||
8dd37758 | 607 | static inline bool |
ea2cf228 | 608 | pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) |
a861a1e1 | 609 | { |
8dd37758 | 610 | return false; |
d6d6dc7c FI |
611 | } |
612 | ||
613 | static inline int | |
ea2cf228 FI |
614 | pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, |
615 | int max) | |
d6d6dc7c FI |
616 | { |
617 | return 0; | |
a861a1e1 FI |
618 | } |
619 | ||
02d1426c WAA |
620 | static inline struct nfs_page * |
621 | pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo, | |
622 | struct page *page) | |
623 | { | |
624 | return NULL; | |
625 | } | |
626 | ||
ef311537 | 627 | static inline int pnfs_layoutcommit_inode(struct inode *inode, bool sync) |
863a3c6c AA |
628 | { |
629 | return 0; | |
630 | } | |
1775bc34 | 631 | |
82be417a AA |
632 | static inline bool |
633 | pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, | |
634 | struct nfs_server *nfss) | |
635 | { | |
636 | return false; | |
637 | } | |
638 | ||
d8c951c3 TM |
639 | static inline bool |
640 | pnfs_layoutcommit_outstanding(struct inode *inode) | |
641 | { | |
642 | return false; | |
643 | } | |
644 | ||
645 | ||
82be417a AA |
646 | static inline struct nfs4_threshold *pnfs_mdsthreshold_alloc(void) |
647 | { | |
648 | return NULL; | |
649 | } | |
650 | ||
5f01d953 PT |
651 | static inline void nfs4_pnfs_v3_ds_connect_unload(void) |
652 | { | |
653 | } | |
654 | ||
85e174ba RL |
655 | #endif /* CONFIG_NFS_V4_1 */ |
656 | ||
657 | #endif /* FS_NFS_PNFS_H */ |