pnfs.h (bd0d10498826ed150da5e4c45baf8b9c7088fb71) pnfs.h (6296556f0b31eaff29f2a3aee2c17b7eae895b98)
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>

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57
58#define LAYOUT_NFSV4_1_MODULE_PREFIX "nfs-layouttype4"
59
60enum {
61 NFS_LAYOUT_RO_FAILED = 0, /* get ro layout failed stop trying */
62 NFS_LAYOUT_RW_FAILED, /* get rw layout failed stop trying */
63 NFS_LAYOUT_BULK_RECALL, /* bulk recall affecting layout */
64 NFS_LAYOUT_ROC, /* some lseg had roc bit set */
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>

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57
58#define LAYOUT_NFSV4_1_MODULE_PREFIX "nfs-layouttype4"
59
60enum {
61 NFS_LAYOUT_RO_FAILED = 0, /* get ro layout failed stop trying */
62 NFS_LAYOUT_RW_FAILED, /* get rw layout failed stop trying */
63 NFS_LAYOUT_BULK_RECALL, /* bulk recall affecting layout */
64 NFS_LAYOUT_ROC, /* some lseg had roc bit set */
65 NFS_LAYOUT_DESTROYED, /* no new use of layout allowed */
66 NFS_LAYOUT_INVALID, /* layout is being destroyed */
67 NFS_LAYOUT_RETURNED, /* layout has already been returned */
68};
69
70enum layoutdriver_policy_flags {
71 /* Should the pNFS client commit and return the layout upon a setattr */
72 PNFS_LAYOUTRET_ON_SETATTR = 1 << 0,
73 PNFS_LAYOUTRET_ON_ERROR = 1 << 1,
74};
75

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135 atomic_t plh_refcount;
136 struct list_head plh_layouts; /* other client layouts */
137 struct list_head plh_bulk_recall; /* clnt list of bulk recalls */
138 struct list_head plh_segs; /* layout segments list */
139 nfs4_stateid plh_stateid;
140 atomic_t plh_outstanding; /* number of RPCs out */
141 unsigned long plh_block_lgets; /* block LAYOUTGET if >0 */
142 u32 plh_barrier; /* ignore lower seqids */
65};
66
67enum layoutdriver_policy_flags {
68 /* Should the pNFS client commit and return the layout upon a setattr */
69 PNFS_LAYOUTRET_ON_SETATTR = 1 << 0,
70 PNFS_LAYOUTRET_ON_ERROR = 1 << 1,
71};
72

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132 atomic_t plh_refcount;
133 struct list_head plh_layouts; /* other client layouts */
134 struct list_head plh_bulk_recall; /* clnt list of bulk recalls */
135 struct list_head plh_segs; /* layout segments list */
136 nfs4_stateid plh_stateid;
137 atomic_t plh_outstanding; /* number of RPCs out */
138 unsigned long plh_block_lgets; /* block LAYOUTGET if >0 */
139 u32 plh_barrier; /* ignore lower seqids */
140 unsigned long plh_retry_timestamp;
143 unsigned long plh_flags;
144 loff_t plh_lwb; /* last write byte for layoutcommit */
145 struct rpc_cred *plh_lc_cred; /* layoutcommit cred */
146 struct inode *plh_inode;
147};
148
149struct pnfs_device {
150 struct nfs4_deviceid dev_id;

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167extern void pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *);
168
169/* nfs4proc.c */
170extern int nfs4_proc_getdevicelist(struct nfs_server *server,
171 const struct nfs_fh *fh,
172 struct pnfs_devicelist *devlist);
173extern int nfs4_proc_getdeviceinfo(struct nfs_server *server,
174 struct pnfs_device *dev);
141 unsigned long plh_flags;
142 loff_t plh_lwb; /* last write byte for layoutcommit */
143 struct rpc_cred *plh_lc_cred; /* layoutcommit cred */
144 struct inode *plh_inode;
145};
146
147struct pnfs_device {
148 struct nfs4_deviceid dev_id;

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165extern void pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *);
166
167/* nfs4proc.c */
168extern int nfs4_proc_getdevicelist(struct nfs_server *server,
169 const struct nfs_fh *fh,
170 struct pnfs_devicelist *devlist);
171extern int nfs4_proc_getdeviceinfo(struct nfs_server *server,
172 struct pnfs_device *dev);
175extern void nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags);
173extern struct pnfs_layout_segment* nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags);
176extern int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp);
177
178/* pnfs.c */
174extern int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp);
175
176/* pnfs.c */
179void get_layout_hdr(struct pnfs_layout_hdr *lo);
180void put_lseg(struct pnfs_layout_segment *lseg);
177void pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo);
178void pnfs_put_lseg(struct pnfs_layout_segment *lseg);
181
182void pnfs_pageio_init_read(struct nfs_pageio_descriptor *, struct inode *,
183 const struct nfs_pgio_completion_ops *);
184void pnfs_pageio_init_write(struct nfs_pageio_descriptor *, struct inode *,
185 int, const struct nfs_pgio_completion_ops *);
186
187void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, u32);
188void unset_pnfs_layoutdriver(struct nfs_server *);
189void pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *, struct nfs_page *);
190int pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc);
179
180void pnfs_pageio_init_read(struct nfs_pageio_descriptor *, struct inode *,
181 const struct nfs_pgio_completion_ops *);
182void pnfs_pageio_init_write(struct nfs_pageio_descriptor *, struct inode *,
183 int, const struct nfs_pgio_completion_ops *);
184
185void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, u32);
186void unset_pnfs_layoutdriver(struct nfs_server *);
187void pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *, struct nfs_page *);
188int pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc);
191void pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *, struct nfs_page *);
189void pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio,
190 struct nfs_page *req, u64 wb_size);
192int pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc);
193bool pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev, struct nfs_page *req);
194void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg);
191int pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc);
192bool pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev, struct nfs_page *req);
193void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg);
195int pnfs_layout_process(struct nfs4_layoutget *lgp);
194struct pnfs_layout_segment *pnfs_layout_process(struct nfs4_layoutget *lgp);
196void pnfs_free_lseg_list(struct list_head *tmp_list);
197void pnfs_destroy_layout(struct nfs_inode *);
198void pnfs_destroy_all_layouts(struct nfs_client *);
195void pnfs_free_lseg_list(struct list_head *tmp_list);
196void pnfs_destroy_layout(struct nfs_inode *);
197void pnfs_destroy_all_layouts(struct nfs_client *);
199void put_layout_hdr(struct pnfs_layout_hdr *lo);
198void pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo);
200void pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo,
201 const nfs4_stateid *new,
202 bool update_barrier);
203int pnfs_choose_layoutget_stateid(nfs4_stateid *dst,
204 struct pnfs_layout_hdr *lo,
205 struct nfs4_state *open_state);
199void pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo,
200 const nfs4_stateid *new,
201 bool update_barrier);
202int pnfs_choose_layoutget_stateid(nfs4_stateid *dst,
203 struct pnfs_layout_hdr *lo,
204 struct nfs4_state *open_state);
206int mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo,
205int pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo,
207 struct list_head *tmp_list,
208 struct pnfs_layout_range *recall_range);
209bool pnfs_roc(struct inode *ino);
210void pnfs_roc_release(struct inode *ino);
211void pnfs_roc_set_barrier(struct inode *ino, u32 barrier);
206 struct list_head *tmp_list,
207 struct pnfs_layout_range *recall_range);
208bool pnfs_roc(struct inode *ino);
209void pnfs_roc_release(struct inode *ino);
210void pnfs_roc_set_barrier(struct inode *ino, u32 barrier);
212bool pnfs_roc_drain(struct inode *ino, u32 *barrier);
211bool pnfs_roc_drain(struct inode *ino, u32 *barrier, struct rpc_task *task);
213void pnfs_set_layoutcommit(struct nfs_write_data *wdata);
214void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data);
215int pnfs_layoutcommit_inode(struct inode *inode, bool sync);
216int _pnfs_return_layout(struct inode *);
217void pnfs_ld_write_done(struct nfs_write_data *);
218void pnfs_ld_read_done(struct nfs_read_data *);
219struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino,
220 struct nfs_open_context *ctx,

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228 const struct nfs_pgio_completion_ops *compl_ops);
229int pnfs_write_done_resend_to_mds(struct inode *inode, struct list_head *head,
230 const struct nfs_pgio_completion_ops *compl_ops);
231struct nfs4_threshold *pnfs_mdsthreshold_alloc(void);
232
233/* nfs4_deviceid_flags */
234enum {
235 NFS_DEVICEID_INVALID = 0, /* set when MDS clientid recalled */
212void pnfs_set_layoutcommit(struct nfs_write_data *wdata);
213void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data);
214int pnfs_layoutcommit_inode(struct inode *inode, bool sync);
215int _pnfs_return_layout(struct inode *);
216void pnfs_ld_write_done(struct nfs_write_data *);
217void pnfs_ld_read_done(struct nfs_read_data *);
218struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino,
219 struct nfs_open_context *ctx,

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227 const struct nfs_pgio_completion_ops *compl_ops);
228int pnfs_write_done_resend_to_mds(struct inode *inode, struct list_head *head,
229 const struct nfs_pgio_completion_ops *compl_ops);
230struct nfs4_threshold *pnfs_mdsthreshold_alloc(void);
231
232/* nfs4_deviceid_flags */
233enum {
234 NFS_DEVICEID_INVALID = 0, /* set when MDS clientid recalled */
235 NFS_DEVICEID_UNAVAILABLE, /* device temporarily unavailable */
236};
237
238/* pnfs_dev.c */
239struct nfs4_deviceid_node {
240 struct hlist_node node;
241 struct hlist_node tmpnode;
242 const struct pnfs_layoutdriver_type *ld;
243 const struct nfs_client *nfs_client;
244 unsigned long flags;
236};
237
238/* pnfs_dev.c */
239struct nfs4_deviceid_node {
240 struct hlist_node node;
241 struct hlist_node tmpnode;
242 const struct pnfs_layoutdriver_type *ld;
243 const struct nfs_client *nfs_client;
244 unsigned long flags;
245 unsigned long timestamp_unavailable;
245 struct nfs4_deviceid deviceid;
246 atomic_t ref;
247};
248
249struct nfs4_deviceid_node *nfs4_find_get_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *);
250void nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *);
251void nfs4_init_deviceid_node(struct nfs4_deviceid_node *,
252 const struct pnfs_layoutdriver_type *,
253 const struct nfs_client *,
254 const struct nfs4_deviceid *);
255struct nfs4_deviceid_node *nfs4_insert_deviceid_node(struct nfs4_deviceid_node *);
256bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *);
246 struct nfs4_deviceid deviceid;
247 atomic_t ref;
248};
249
250struct nfs4_deviceid_node *nfs4_find_get_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *);
251void nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *);
252void nfs4_init_deviceid_node(struct nfs4_deviceid_node *,
253 const struct pnfs_layoutdriver_type *,
254 const struct nfs_client *,
255 const struct nfs4_deviceid *);
256struct nfs4_deviceid_node *nfs4_insert_deviceid_node(struct nfs4_deviceid_node *);
257bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *);
258void nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node);
259bool nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node);
257void nfs4_deviceid_purge_client(const struct nfs_client *);
258
260void nfs4_deviceid_purge_client(const struct nfs_client *);
261
259static inline void
260pnfs_mark_layout_returned(struct pnfs_layout_hdr *lo)
261{
262 set_bit(NFS_LAYOUT_RETURNED, &lo->plh_flags);
263}
264
265static inline void
266pnfs_clear_layout_returned(struct pnfs_layout_hdr *lo)
267{
268 clear_bit(NFS_LAYOUT_RETURNED, &lo->plh_flags);
269}
270
271static inline bool
272pnfs_test_layout_returned(struct pnfs_layout_hdr *lo)
273{
274 return test_bit(NFS_LAYOUT_RETURNED, &lo->plh_flags);
275}
276
277static inline int lo_fail_bit(u32 iomode)
278{
279 return iomode == IOMODE_RW ?
280 NFS_LAYOUT_RW_FAILED : NFS_LAYOUT_RO_FAILED;
281}
282
283static inline struct pnfs_layout_segment *
262static inline struct pnfs_layout_segment *
284get_lseg(struct pnfs_layout_segment *lseg)
263pnfs_get_lseg(struct pnfs_layout_segment *lseg)
285{
286 if (lseg) {
287 atomic_inc(&lseg->pls_refcount);
288 smp_mb__after_atomic_inc();
289 }
290 return lseg;
291}
292

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401{
402}
403
404static inline void pnfs_destroy_layout(struct nfs_inode *nfsi)
405{
406}
407
408static inline struct pnfs_layout_segment *
264{
265 if (lseg) {
266 atomic_inc(&lseg->pls_refcount);
267 smp_mb__after_atomic_inc();
268 }
269 return lseg;
270}
271

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380{
381}
382
383static inline void pnfs_destroy_layout(struct nfs_inode *nfsi)
384{
385}
386
387static inline struct pnfs_layout_segment *
409get_lseg(struct pnfs_layout_segment *lseg)
388pnfs_get_lseg(struct pnfs_layout_segment *lseg)
410{
411 return NULL;
412}
413
389{
390 return NULL;
391}
392
414static inline void put_lseg(struct pnfs_layout_segment *lseg)
393static inline void pnfs_put_lseg(struct pnfs_layout_segment *lseg)
415{
416}
417
418static inline int pnfs_return_layout(struct inode *ino)
419{
420 return 0;
421}
422

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438}
439
440static inline void
441pnfs_roc_set_barrier(struct inode *ino, u32 barrier)
442{
443}
444
445static inline bool
394{
395}
396
397static inline int pnfs_return_layout(struct inode *ino)
398{
399 return 0;
400}
401

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417}
418
419static inline void
420pnfs_roc_set_barrier(struct inode *ino, u32 barrier)
421{
422}
423
424static inline bool
446pnfs_roc_drain(struct inode *ino, u32 *barrier)
425pnfs_roc_drain(struct inode *ino, u32 *barrier, struct rpc_task *task)
447{
448 return false;
449}
450
451static inline void set_pnfs_layoutdriver(struct nfs_server *s,
452 const struct nfs_fh *mntfh, u32 id)
453{
454}

--- 76 unchanged lines hidden --- 		426{
427 return false;
428}
429
430static inline void set_pnfs_layoutdriver(struct nfs_server *s,
431 const struct nfs_fh *mntfh, u32 id)
432{
433}

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