Commit | Line | Data |
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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 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 */ |
df52699e | 206 | unsigned char nocache : 1;/* May not be cached */ |
b1f69b75 AA |
207 | }; |
208 | ||
7f11d8d3 AA |
209 | #define NFS4_PNFS_GETDEVLIST_MAXNUM 16 |
210 | ||
211 | struct pnfs_devicelist { | |
212 | unsigned int eof; | |
213 | unsigned int num_devs; | |
214 | struct nfs4_deviceid dev_id[NFS4_PNFS_GETDEVLIST_MAXNUM]; | |
215 | }; | |
216 | ||
02c35fca FI |
217 | extern int pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *); |
218 | extern void pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *); | |
219 | ||
b1f69b75 AA |
220 | /* nfs4proc.c */ |
221 | extern int nfs4_proc_getdeviceinfo(struct nfs_server *server, | |
cd5875fe TM |
222 | struct pnfs_device *dev, |
223 | struct rpc_cred *cred); | |
a0b0a6e3 | 224 | extern struct pnfs_layout_segment* nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags); |
6c16605d | 225 | extern int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync); |
b1f69b75 AA |
226 | |
227 | /* pnfs.c */ | |
70c3bd2b | 228 | void pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo); |
9369a431 | 229 | void pnfs_put_lseg(struct pnfs_layout_segment *lseg); |
6543f803 | 230 | void pnfs_put_lseg_locked(struct pnfs_layout_segment *lseg); |
1751c363 | 231 | |
738fd0f3 | 232 | void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, u32); |
85e174ba | 233 | void unset_pnfs_layoutdriver(struct nfs_server *); |
d8007d4d | 234 | void pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *, struct nfs_page *); |
493292dd | 235 | int pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc); |
6296556f PT |
236 | void pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio, |
237 | struct nfs_page *req, u64 wb_size); | |
180bb5ec | 238 | void pnfs_generic_pg_cleanup(struct nfs_pageio_descriptor *); |
dce81290 | 239 | int pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc); |
b4fdac1a WAA |
240 | size_t pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, |
241 | struct nfs_page *prev, struct nfs_page *req); | |
1b0ae068 | 242 | void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg); |
a0b0a6e3 | 243 | struct pnfs_layout_segment *pnfs_layout_process(struct nfs4_layoutget *lgp); |
43f1b3da | 244 | void pnfs_free_lseg_list(struct list_head *tmp_list); |
e5e94017 | 245 | void pnfs_destroy_layout(struct nfs_inode *); |
974cec8c | 246 | void pnfs_destroy_all_layouts(struct nfs_client *); |
fd9a8d71 TM |
247 | int pnfs_destroy_layouts_byfsid(struct nfs_client *clp, |
248 | struct nfs_fsid *fsid, | |
249 | bool is_recall); | |
250 | int pnfs_destroy_layouts_byclid(struct nfs_client *clp, | |
251 | bool is_recall); | |
70c3bd2b | 252 | void pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo); |
43f1b3da FI |
253 | void pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, |
254 | const nfs4_stateid *new, | |
255 | bool update_barrier); | |
fd6002e9 FI |
256 | int pnfs_choose_layoutget_stateid(nfs4_stateid *dst, |
257 | struct pnfs_layout_hdr *lo, | |
ce6ab4f2 | 258 | struct pnfs_layout_range *range, |
fd6002e9 | 259 | struct nfs4_state *open_state); |
49a85061 | 260 | int pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, |
43f1b3da | 261 | struct list_head *tmp_list, |
778b5502 | 262 | struct pnfs_layout_range *recall_range); |
f7e8917a FI |
263 | bool pnfs_roc(struct inode *ino); |
264 | void pnfs_roc_release(struct inode *ino); | |
265 | void pnfs_roc_set_barrier(struct inode *ino, u32 barrier); | |
7fdab069 | 266 | bool pnfs_roc_drain(struct inode *ino, u32 *barrier, struct rpc_task *task); |
d45f60c6 | 267 | void pnfs_set_layoutcommit(struct nfs_pgio_header *); |
378520b8 | 268 | void pnfs_commit_set_layoutcommit(struct nfs_commit_data *data); |
db29c089 | 269 | void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data); |
ef311537 | 270 | int pnfs_layoutcommit_inode(struct inode *inode, bool sync); |
cbe82603 | 271 | int _pnfs_return_layout(struct inode *); |
24028672 | 272 | int pnfs_commit_and_return_layout(struct inode *); |
d45f60c6 WAA |
273 | void pnfs_ld_write_done(struct nfs_pgio_header *); |
274 | void pnfs_ld_read_done(struct nfs_pgio_header *); | |
ceb11e13 | 275 | int pnfs_read_resend_pnfs(struct nfs_pgio_header *); |
7c24d948 AA |
276 | struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino, |
277 | struct nfs_open_context *ctx, | |
278 | loff_t pos, | |
279 | u64 count, | |
280 | enum pnfs_iomode iomode, | |
281 | gfp_t gfp_flags); | |
d67ae825 | 282 | void pnfs_clear_layoutreturn_waitbit(struct pnfs_layout_hdr *lo); |
e5e94017 | 283 | |
c47abcf8 | 284 | void nfs4_deviceid_mark_client_invalid(struct nfs_client *clp); |
53113ad3 WAA |
285 | int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *); |
286 | int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *); | |
82be417a | 287 | struct nfs4_threshold *pnfs_mdsthreshold_alloc(void); |
016256df PT |
288 | void pnfs_error_mark_layout_for_return(struct inode *inode, |
289 | struct pnfs_layout_segment *lseg); | |
c47abcf8 AA |
290 | |
291 | /* nfs4_deviceid_flags */ | |
292 | enum { | |
293 | NFS_DEVICEID_INVALID = 0, /* set when MDS clientid recalled */ | |
1dfed273 | 294 | NFS_DEVICEID_UNAVAILABLE, /* device temporarily unavailable */ |
df52699e | 295 | NFS_DEVICEID_NOCACHE, /* device may not be cached */ |
c47abcf8 AA |
296 | }; |
297 | ||
a1eaecbc BH |
298 | /* pnfs_dev.c */ |
299 | struct nfs4_deviceid_node { | |
300 | struct hlist_node node; | |
9e3bd4e2 | 301 | struct hlist_node tmpnode; |
1775bc34 | 302 | const struct pnfs_layoutdriver_type *ld; |
a1eaecbc | 303 | const struct nfs_client *nfs_client; |
c47abcf8 | 304 | unsigned long flags; |
1dfed273 | 305 | unsigned long timestamp_unavailable; |
a1eaecbc | 306 | struct nfs4_deviceid deviceid; |
84a80f62 | 307 | struct rcu_head rcu; |
a1eaecbc BH |
308 | atomic_t ref; |
309 | }; | |
310 | ||
661373b1 CH |
311 | struct nfs4_deviceid_node * |
312 | nfs4_find_get_deviceid(struct nfs_server *server, | |
313 | const struct nfs4_deviceid *id, struct rpc_cred *cred, | |
314 | gfp_t gfp_mask); | |
35c8bb54 | 315 | void nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *); |
661373b1 | 316 | void nfs4_init_deviceid_node(struct nfs4_deviceid_node *, struct nfs_server *, |
a1eaecbc | 317 | const struct nfs4_deviceid *); |
a1eaecbc | 318 | bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *); |
1dfed273 TM |
319 | void nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node); |
320 | bool nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node); | |
1775bc34 | 321 | void nfs4_deviceid_purge_client(const struct nfs_client *); |
a1eaecbc | 322 | |
f54bcf2e TH |
323 | /* pnfs_nfs.c */ |
324 | void pnfs_generic_clear_request_commit(struct nfs_page *req, | |
325 | struct nfs_commit_info *cinfo); | |
326 | void pnfs_generic_commit_release(void *calldata); | |
327 | void pnfs_generic_prepare_to_resend_writes(struct nfs_commit_data *data); | |
328 | void pnfs_generic_rw_release(void *data); | |
329 | void pnfs_generic_recover_commit_reqs(struct list_head *dst, | |
330 | struct nfs_commit_info *cinfo); | |
331 | int pnfs_generic_commit_pagelist(struct inode *inode, | |
332 | struct list_head *mds_pages, | |
333 | int how, | |
334 | struct nfs_commit_info *cinfo, | |
335 | int (*initiate_commit)(struct nfs_commit_data *data, | |
336 | int how)); | |
337 | int pnfs_generic_scan_commit_lists(struct nfs_commit_info *cinfo, int max); | |
338 | void pnfs_generic_write_commit_done(struct rpc_task *task, void *data); | |
875ae069 PT |
339 | void nfs4_pnfs_ds_put(struct nfs4_pnfs_ds *ds); |
340 | struct nfs4_pnfs_ds *nfs4_pnfs_ds_add(struct list_head *dsaddrs, | |
341 | gfp_t gfp_flags); | |
5f01d953 | 342 | void nfs4_pnfs_v3_ds_connect_unload(void); |
7405f9e1 PT |
343 | void nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds, |
344 | struct nfs4_deviceid_node *devid, unsigned int timeo, | |
5f01d953 | 345 | unsigned int retrans, u32 version, u32 minor_version, |
30626f9c | 346 | rpc_authflavor_t au_flavor); |
6b7f3cf9 PT |
347 | struct nfs4_pnfs_ds_addr *nfs4_decode_mp_ds_addr(struct net *net, |
348 | struct xdr_stream *xdr, | |
349 | gfp_t gfp_flags); | |
338d00cf TH |
350 | void pnfs_layout_mark_request_commit(struct nfs_page *req, |
351 | struct pnfs_layout_segment *lseg, | |
352 | struct nfs_commit_info *cinfo, | |
353 | u32 ds_commit_idx); | |
f54bcf2e | 354 | |
40dd4b7a TM |
355 | static inline bool nfs_have_layout(struct inode *inode) |
356 | { | |
357 | return NFS_I(inode)->layout != NULL; | |
358 | } | |
359 | ||
30ff0603 CH |
360 | static inline struct nfs4_deviceid_node * |
361 | nfs4_get_deviceid(struct nfs4_deviceid_node *d) | |
362 | { | |
363 | atomic_inc(&d->ref); | |
364 | return d; | |
365 | } | |
366 | ||
c829013d PT |
367 | static inline void pnfs_set_retry_layoutget(struct pnfs_layout_hdr *lo) |
368 | { | |
369 | if (!test_and_set_bit(NFS_LAYOUT_RETRY_LAYOUTGET, &lo->plh_flags)) | |
370 | atomic_inc(&lo->plh_refcount); | |
371 | } | |
372 | ||
373 | static inline void pnfs_clear_retry_layoutget(struct pnfs_layout_hdr *lo) | |
374 | { | |
aa8a45ee | 375 | if (test_and_clear_bit(NFS_LAYOUT_RETRY_LAYOUTGET, &lo->plh_flags)) { |
c829013d | 376 | atomic_dec(&lo->plh_refcount); |
aa8a45ee PT |
377 | /* wake up waiters for LAYOUTRETURN as that is not needed */ |
378 | wake_up_bit(&lo->plh_flags, NFS_LAYOUT_RETURN); | |
379 | } | |
c829013d PT |
380 | } |
381 | ||
382 | static inline bool pnfs_should_retry_layoutget(struct pnfs_layout_hdr *lo) | |
383 | { | |
384 | return test_bit(NFS_LAYOUT_RETRY_LAYOUTGET, &lo->plh_flags); | |
385 | } | |
386 | ||
d684d2ae | 387 | static inline struct pnfs_layout_segment * |
9369a431 | 388 | pnfs_get_lseg(struct pnfs_layout_segment *lseg) |
d684d2ae FI |
389 | { |
390 | if (lseg) { | |
391 | atomic_inc(&lseg->pls_refcount); | |
4e857c58 | 392 | smp_mb__after_atomic(); |
d684d2ae FI |
393 | } |
394 | return lseg; | |
395 | } | |
396 | ||
e5e94017 BH |
397 | /* Return true if a layout driver is being used for this mountpoint */ |
398 | static inline int pnfs_enabled_sb(struct nfs_server *nfss) | |
399 | { | |
400 | return nfss->pnfs_curr_ld != NULL; | |
401 | } | |
85e174ba | 402 | |
a861a1e1 | 403 | static inline int |
ea2cf228 FI |
404 | pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, |
405 | struct nfs_commit_info *cinfo) | |
a861a1e1 | 406 | { |
ea2cf228 | 407 | if (cinfo->ds == NULL || cinfo->ds->ncommitting == 0) |
a861a1e1 | 408 | return PNFS_NOT_ATTEMPTED; |
ea2cf228 FI |
409 | return NFS_SERVER(inode)->pnfs_curr_ld->commit_pagelist(inode, mds_pages, how, cinfo); |
410 | } | |
411 | ||
412 | static inline struct pnfs_ds_commit_info * | |
413 | pnfs_get_ds_info(struct inode *inode) | |
414 | { | |
415 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; | |
416 | ||
417 | if (ld == NULL || ld->get_ds_info == NULL) | |
418 | return NULL; | |
419 | return ld->get_ds_info(inode); | |
a861a1e1 FI |
420 | } |
421 | ||
f54bcf2e TH |
422 | static inline void |
423 | pnfs_generic_mark_devid_invalid(struct nfs4_deviceid_node *node) | |
424 | { | |
425 | set_bit(NFS_DEVICEID_INVALID, &node->flags); | |
426 | } | |
427 | ||
8dd37758 | 428 | static inline bool |
ea2cf228 | 429 | pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, |
b57ff130 | 430 | struct nfs_commit_info *cinfo, u32 ds_commit_idx) |
a861a1e1 | 431 | { |
d6d6dc7c | 432 | struct inode *inode = req->wb_context->dentry->d_inode; |
8dd37758 | 433 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; |
a861a1e1 | 434 | |
8dd37758 TM |
435 | if (lseg == NULL || ld->mark_request_commit == NULL) |
436 | return false; | |
b57ff130 | 437 | ld->mark_request_commit(req, lseg, cinfo, ds_commit_idx); |
8dd37758 | 438 | return true; |
a861a1e1 FI |
439 | } |
440 | ||
8dd37758 | 441 | static inline bool |
ea2cf228 | 442 | pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) |
a861a1e1 | 443 | { |
d6d6dc7c | 444 | struct inode *inode = req->wb_context->dentry->d_inode; |
8dd37758 | 445 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; |
d6d6dc7c | 446 | |
8dd37758 TM |
447 | if (ld == NULL || ld->clear_request_commit == NULL) |
448 | return false; | |
ea2cf228 | 449 | ld->clear_request_commit(req, cinfo); |
8dd37758 | 450 | return true; |
d6d6dc7c FI |
451 | } |
452 | ||
453 | static inline int | |
ea2cf228 FI |
454 | pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, |
455 | int max) | |
d6d6dc7c | 456 | { |
ea2cf228 | 457 | if (cinfo->ds == NULL || cinfo->ds->nwritten == 0) |
d6d6dc7c | 458 | return 0; |
ea2cf228 FI |
459 | else |
460 | return NFS_SERVER(inode)->pnfs_curr_ld->scan_commit_lists(cinfo, max); | |
a861a1e1 FI |
461 | } |
462 | ||
02d1426c WAA |
463 | static inline struct nfs_page * |
464 | pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo, | |
465 | struct page *page) | |
466 | { | |
467 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; | |
468 | ||
469 | if (ld == NULL || ld->search_commit_reqs == NULL) | |
470 | return NULL; | |
471 | return ld->search_commit_reqs(cinfo, page); | |
472 | } | |
473 | ||
8a1636c4 BH |
474 | /* Should the pNFS client commit and return the layout upon a setattr */ |
475 | static inline bool | |
476 | pnfs_ld_layoutret_on_setattr(struct inode *inode) | |
477 | { | |
478 | if (!pnfs_enabled_sb(NFS_SERVER(inode))) | |
479 | return false; | |
480 | return NFS_SERVER(inode)->pnfs_curr_ld->flags & | |
481 | PNFS_LAYOUTRET_ON_SETATTR; | |
482 | } | |
483 | ||
612aa983 CH |
484 | static inline bool |
485 | pnfs_ld_read_whole_page(struct inode *inode) | |
486 | { | |
487 | if (!pnfs_enabled_sb(NFS_SERVER(inode))) | |
488 | return false; | |
489 | return NFS_SERVER(inode)->pnfs_curr_ld->flags & PNFS_READ_WHOLE_PAGE; | |
490 | } | |
491 | ||
d8c951c3 TM |
492 | static inline bool |
493 | pnfs_layoutcommit_outstanding(struct inode *inode) | |
494 | { | |
495 | struct nfs_inode *nfsi = NFS_I(inode); | |
496 | ||
497 | return test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags) != 0 || | |
498 | test_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags) != 0; | |
499 | } | |
500 | ||
cbe82603 BH |
501 | static inline int pnfs_return_layout(struct inode *ino) |
502 | { | |
503 | struct nfs_inode *nfsi = NFS_I(ino); | |
504 | struct nfs_server *nfss = NFS_SERVER(ino); | |
505 | ||
506 | if (pnfs_enabled_sb(nfss) && nfsi->layout) | |
507 | return _pnfs_return_layout(ino); | |
508 | ||
509 | return 0; | |
510 | } | |
511 | ||
82be417a AA |
512 | static inline bool |
513 | pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, | |
514 | struct nfs_server *nfss) | |
515 | { | |
fb47ddc9 | 516 | return (dst && src && src->bm != 0 && nfss->pnfs_curr_ld && |
82be417a AA |
517 | nfss->pnfs_curr_ld->id == src->l_type); |
518 | } | |
519 | ||
6f00866d TM |
520 | #ifdef NFS_DEBUG |
521 | void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id); | |
522 | #else | |
523 | static inline void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id) | |
524 | { | |
525 | } | |
526 | #endif /* NFS_DEBUG */ | |
85e174ba RL |
527 | #else /* CONFIG_NFS_V4_1 */ |
528 | ||
40dd4b7a TM |
529 | static inline bool nfs_have_layout(struct inode *inode) |
530 | { | |
531 | return false; | |
532 | } | |
533 | ||
974cec8c AA |
534 | static inline void pnfs_destroy_all_layouts(struct nfs_client *clp) |
535 | { | |
536 | } | |
537 | ||
e5e94017 BH |
538 | static inline void pnfs_destroy_layout(struct nfs_inode *nfsi) |
539 | { | |
540 | } | |
541 | ||
d684d2ae | 542 | static inline struct pnfs_layout_segment * |
9369a431 | 543 | pnfs_get_lseg(struct pnfs_layout_segment *lseg) |
d684d2ae FI |
544 | { |
545 | return NULL; | |
546 | } | |
547 | ||
9369a431 | 548 | static inline void pnfs_put_lseg(struct pnfs_layout_segment *lseg) |
d684d2ae FI |
549 | { |
550 | } | |
551 | ||
cbe82603 BH |
552 | static inline int pnfs_return_layout(struct inode *ino) |
553 | { | |
554 | return 0; | |
555 | } | |
556 | ||
24028672 TM |
557 | static inline int pnfs_commit_and_return_layout(struct inode *inode) |
558 | { | |
559 | return 0; | |
560 | } | |
561 | ||
8a1636c4 BH |
562 | static inline bool |
563 | pnfs_ld_layoutret_on_setattr(struct inode *inode) | |
564 | { | |
565 | return false; | |
566 | } | |
567 | ||
612aa983 CH |
568 | static inline bool |
569 | pnfs_ld_read_whole_page(struct inode *inode) | |
570 | { | |
571 | return false; | |
572 | } | |
573 | ||
f7e8917a FI |
574 | static inline bool |
575 | pnfs_roc(struct inode *ino) | |
576 | { | |
577 | return false; | |
578 | } | |
579 | ||
580 | static inline void | |
581 | pnfs_roc_release(struct inode *ino) | |
582 | { | |
583 | } | |
584 | ||
585 | static inline void | |
586 | pnfs_roc_set_barrier(struct inode *ino, u32 barrier) | |
587 | { | |
588 | } | |
589 | ||
590 | static inline bool | |
7fdab069 | 591 | pnfs_roc_drain(struct inode *ino, u32 *barrier, struct rpc_task *task) |
f7e8917a FI |
592 | { |
593 | return false; | |
594 | } | |
595 | ||
738fd0f3 | 596 | static inline void set_pnfs_layoutdriver(struct nfs_server *s, |
a00ed25c | 597 | const struct nfs_fh *mntfh, u32 id) |
85e174ba RL |
598 | { |
599 | } | |
600 | ||
601 | static inline void unset_pnfs_layoutdriver(struct nfs_server *s) | |
602 | { | |
603 | } | |
604 | ||
a861a1e1 | 605 | static inline int |
ea2cf228 FI |
606 | pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, |
607 | struct nfs_commit_info *cinfo) | |
a861a1e1 FI |
608 | { |
609 | return PNFS_NOT_ATTEMPTED; | |
610 | } | |
611 | ||
ea2cf228 FI |
612 | static inline struct pnfs_ds_commit_info * |
613 | pnfs_get_ds_info(struct inode *inode) | |
614 | { | |
615 | return NULL; | |
616 | } | |
617 | ||
8dd37758 | 618 | static inline bool |
ea2cf228 | 619 | pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, |
b57ff130 | 620 | struct nfs_commit_info *cinfo, u32 ds_commit_idx) |
a861a1e1 | 621 | { |
8dd37758 | 622 | return false; |
a861a1e1 FI |
623 | } |
624 | ||
8dd37758 | 625 | static inline bool |
ea2cf228 | 626 | pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) |
a861a1e1 | 627 | { |
8dd37758 | 628 | return false; |
d6d6dc7c FI |
629 | } |
630 | ||
631 | static inline int | |
ea2cf228 FI |
632 | pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, |
633 | int max) | |
d6d6dc7c FI |
634 | { |
635 | return 0; | |
a861a1e1 FI |
636 | } |
637 | ||
02d1426c WAA |
638 | static inline struct nfs_page * |
639 | pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo, | |
640 | struct page *page) | |
641 | { | |
642 | return NULL; | |
643 | } | |
644 | ||
ef311537 | 645 | static inline int pnfs_layoutcommit_inode(struct inode *inode, bool sync) |
863a3c6c AA |
646 | { |
647 | return 0; | |
648 | } | |
1775bc34 | 649 | |
82be417a AA |
650 | static inline bool |
651 | pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, | |
652 | struct nfs_server *nfss) | |
653 | { | |
654 | return false; | |
655 | } | |
656 | ||
d8c951c3 TM |
657 | static inline bool |
658 | pnfs_layoutcommit_outstanding(struct inode *inode) | |
659 | { | |
660 | return false; | |
661 | } | |
662 | ||
663 | ||
82be417a AA |
664 | static inline struct nfs4_threshold *pnfs_mdsthreshold_alloc(void) |
665 | { | |
666 | return NULL; | |
667 | } | |
668 | ||
5f01d953 PT |
669 | static inline void nfs4_pnfs_v3_ds_connect_unload(void) |
670 | { | |
671 | } | |
672 | ||
85e174ba RL |
673 | #endif /* CONFIG_NFS_V4_1 */ |
674 | ||
675 | #endif /* FS_NFS_PNFS_H */ |