~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/include/linux/fscache-cache.h

Version: ~ [ linux-5.10-rc1 ] ~ [ linux-5.9.1 ] ~ [ linux-5.8.16 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.72 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.152 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.202 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.240 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.240 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.85 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /* General filesystem caching backing cache interface
  2  *
  3  * Copyright (C) 2004-2007 Red Hat, Inc. All Rights Reserved.
  4  * Written by David Howells (dhowells@redhat.com)
  5  *
  6  * This program is free software; you can redistribute it and/or
  7  * modify it under the terms of the GNU General Public License
  8  * as published by the Free Software Foundation; either version
  9  * 2 of the License, or (at your option) any later version.
 10  *
 11  * NOTE!!! See:
 12  *
 13  *      Documentation/filesystems/caching/backend-api.txt
 14  *
 15  * for a description of the cache backend interface declared here.
 16  */
 17 
 18 #ifndef _LINUX_FSCACHE_CACHE_H
 19 #define _LINUX_FSCACHE_CACHE_H
 20 
 21 #include <linux/fscache.h>
 22 #include <linux/sched.h>
 23 #include <linux/workqueue.h>
 24 
 25 #define NR_MAXCACHES BITS_PER_LONG
 26 
 27 struct fscache_cache;
 28 struct fscache_cache_ops;
 29 struct fscache_object;
 30 struct fscache_operation;
 31 
 32 enum fscache_obj_ref_trace {
 33         fscache_obj_get_add_to_deps,
 34         fscache_obj_get_queue,
 35         fscache_obj_put_alloc_fail,
 36         fscache_obj_put_attach_fail,
 37         fscache_obj_put_drop_obj,
 38         fscache_obj_put_enq_dep,
 39         fscache_obj_put_queue,
 40         fscache_obj_put_work,
 41         fscache_obj_ref__nr_traces
 42 };
 43 
 44 /*
 45  * cache tag definition
 46  */
 47 struct fscache_cache_tag {
 48         struct list_head        link;
 49         struct fscache_cache    *cache;         /* cache referred to by this tag */
 50         unsigned long           flags;
 51 #define FSCACHE_TAG_RESERVED    0               /* T if tag is reserved for a cache */
 52         atomic_t                usage;
 53         char                    name[0];        /* tag name */
 54 };
 55 
 56 /*
 57  * cache definition
 58  */
 59 struct fscache_cache {
 60         const struct fscache_cache_ops *ops;
 61         struct fscache_cache_tag *tag;          /* tag representing this cache */
 62         struct kobject          *kobj;          /* system representation of this cache */
 63         struct list_head        link;           /* link in list of caches */
 64         size_t                  max_index_size; /* maximum size of index data */
 65         char                    identifier[36]; /* cache label */
 66 
 67         /* node management */
 68         struct work_struct      op_gc;          /* operation garbage collector */
 69         struct list_head        object_list;    /* list of data/index objects */
 70         struct list_head        op_gc_list;     /* list of ops to be deleted */
 71         spinlock_t              object_list_lock;
 72         spinlock_t              op_gc_list_lock;
 73         atomic_t                object_count;   /* no. of live objects in this cache */
 74         struct fscache_object   *fsdef;         /* object for the fsdef index */
 75         unsigned long           flags;
 76 #define FSCACHE_IOERROR         0       /* cache stopped on I/O error */
 77 #define FSCACHE_CACHE_WITHDRAWN 1       /* cache has been withdrawn */
 78 };
 79 
 80 extern wait_queue_head_t fscache_cache_cleared_wq;
 81 
 82 /*
 83  * operation to be applied to a cache object
 84  * - retrieval initiation operations are done in the context of the process
 85  *   that issued them, and not in an async thread pool
 86  */
 87 typedef void (*fscache_operation_release_t)(struct fscache_operation *op);
 88 typedef void (*fscache_operation_processor_t)(struct fscache_operation *op);
 89 typedef void (*fscache_operation_cancel_t)(struct fscache_operation *op);
 90 
 91 enum fscache_operation_state {
 92         FSCACHE_OP_ST_BLANK,            /* Op is not yet submitted */
 93         FSCACHE_OP_ST_INITIALISED,      /* Op is initialised */
 94         FSCACHE_OP_ST_PENDING,          /* Op is blocked from running */
 95         FSCACHE_OP_ST_IN_PROGRESS,      /* Op is in progress */
 96         FSCACHE_OP_ST_COMPLETE,         /* Op is complete */
 97         FSCACHE_OP_ST_CANCELLED,        /* Op has been cancelled */
 98         FSCACHE_OP_ST_DEAD              /* Op is now dead */
 99 };
100 
101 struct fscache_operation {
102         struct work_struct      work;           /* record for async ops */
103         struct list_head        pend_link;      /* link in object->pending_ops */
104         struct fscache_object   *object;        /* object to be operated upon */
105 
106         unsigned long           flags;
107 #define FSCACHE_OP_TYPE         0x000f  /* operation type */
108 #define FSCACHE_OP_ASYNC        0x0001  /* - async op, processor may sleep for disk */
109 #define FSCACHE_OP_MYTHREAD     0x0002  /* - processing is done be issuing thread, not pool */
110 #define FSCACHE_OP_WAITING      4       /* cleared when op is woken */
111 #define FSCACHE_OP_EXCLUSIVE    5       /* exclusive op, other ops must wait */
112 #define FSCACHE_OP_DEC_READ_CNT 6       /* decrement object->n_reads on destruction */
113 #define FSCACHE_OP_UNUSE_COOKIE 7       /* call fscache_unuse_cookie() on completion */
114 #define FSCACHE_OP_KEEP_FLAGS   0x00f0  /* flags to keep when repurposing an op */
115 
116         enum fscache_operation_state state;
117         atomic_t                usage;
118         unsigned                debug_id;       /* debugging ID */
119 
120         /* operation processor callback
121          * - can be NULL if FSCACHE_OP_WAITING is going to be used to perform
122          *   the op in a non-pool thread */
123         fscache_operation_processor_t processor;
124 
125         /* Operation cancellation cleanup (optional) */
126         fscache_operation_cancel_t cancel;
127 
128         /* operation releaser */
129         fscache_operation_release_t release;
130 };
131 
132 extern atomic_t fscache_op_debug_id;
133 extern void fscache_op_work_func(struct work_struct *work);
134 
135 extern void fscache_enqueue_operation(struct fscache_operation *);
136 extern void fscache_op_complete(struct fscache_operation *, bool);
137 extern void fscache_put_operation(struct fscache_operation *);
138 extern void fscache_operation_init(struct fscache_cookie *,
139                                    struct fscache_operation *,
140                                    fscache_operation_processor_t,
141                                    fscache_operation_cancel_t,
142                                    fscache_operation_release_t);
143 
144 /*
145  * data read operation
146  */
147 struct fscache_retrieval {
148         struct fscache_operation op;
149         struct fscache_cookie   *cookie;        /* The netfs cookie */
150         struct address_space    *mapping;       /* netfs pages */
151         fscache_rw_complete_t   end_io_func;    /* function to call on I/O completion */
152         void                    *context;       /* netfs read context (pinned) */
153         struct list_head        to_do;          /* list of things to be done by the backend */
154         unsigned long           start_time;     /* time at which retrieval started */
155         atomic_t                n_pages;        /* number of pages to be retrieved */
156 };
157 
158 typedef int (*fscache_page_retrieval_func_t)(struct fscache_retrieval *op,
159                                              struct page *page,
160                                              gfp_t gfp);
161 
162 typedef int (*fscache_pages_retrieval_func_t)(struct fscache_retrieval *op,
163                                               struct list_head *pages,
164                                               unsigned *nr_pages,
165                                               gfp_t gfp);
166 
167 /**
168  * fscache_get_retrieval - Get an extra reference on a retrieval operation
169  * @op: The retrieval operation to get a reference on
170  *
171  * Get an extra reference on a retrieval operation.
172  */
173 static inline
174 struct fscache_retrieval *fscache_get_retrieval(struct fscache_retrieval *op)
175 {
176         atomic_inc(&op->op.usage);
177         return op;
178 }
179 
180 /**
181  * fscache_enqueue_retrieval - Enqueue a retrieval operation for processing
182  * @op: The retrieval operation affected
183  *
184  * Enqueue a retrieval operation for processing by the FS-Cache thread pool.
185  */
186 static inline void fscache_enqueue_retrieval(struct fscache_retrieval *op)
187 {
188         fscache_enqueue_operation(&op->op);
189 }
190 
191 /**
192  * fscache_retrieval_complete - Record (partial) completion of a retrieval
193  * @op: The retrieval operation affected
194  * @n_pages: The number of pages to account for
195  */
196 static inline void fscache_retrieval_complete(struct fscache_retrieval *op,
197                                               int n_pages)
198 {
199         atomic_sub(n_pages, &op->n_pages);
200         if (atomic_read(&op->n_pages) <= 0)
201                 fscache_op_complete(&op->op, false);
202 }
203 
204 /**
205  * fscache_put_retrieval - Drop a reference to a retrieval operation
206  * @op: The retrieval operation affected
207  *
208  * Drop a reference to a retrieval operation.
209  */
210 static inline void fscache_put_retrieval(struct fscache_retrieval *op)
211 {
212         fscache_put_operation(&op->op);
213 }
214 
215 /*
216  * cached page storage work item
217  * - used to do three things:
218  *   - batch writes to the cache
219  *   - do cache writes asynchronously
220  *   - defer writes until cache object lookup completion
221  */
222 struct fscache_storage {
223         struct fscache_operation op;
224         pgoff_t                 store_limit;    /* don't write more than this */
225 };
226 
227 /*
228  * cache operations
229  */
230 struct fscache_cache_ops {
231         /* name of cache provider */
232         const char *name;
233 
234         /* allocate an object record for a cookie */
235         struct fscache_object *(*alloc_object)(struct fscache_cache *cache,
236                                                struct fscache_cookie *cookie);
237 
238         /* look up the object for a cookie
239          * - return -ETIMEDOUT to be requeued
240          */
241         int (*lookup_object)(struct fscache_object *object);
242 
243         /* finished looking up */
244         void (*lookup_complete)(struct fscache_object *object);
245 
246         /* increment the usage count on this object (may fail if unmounting) */
247         struct fscache_object *(*grab_object)(struct fscache_object *object,
248                                               enum fscache_obj_ref_trace why);
249 
250         /* pin an object in the cache */
251         int (*pin_object)(struct fscache_object *object);
252 
253         /* unpin an object in the cache */
254         void (*unpin_object)(struct fscache_object *object);
255 
256         /* check the consistency between the backing cache and the FS-Cache
257          * cookie */
258         int (*check_consistency)(struct fscache_operation *op);
259 
260         /* store the updated auxiliary data on an object */
261         void (*update_object)(struct fscache_object *object);
262 
263         /* Invalidate an object */
264         void (*invalidate_object)(struct fscache_operation *op);
265 
266         /* discard the resources pinned by an object and effect retirement if
267          * necessary */
268         void (*drop_object)(struct fscache_object *object);
269 
270         /* dispose of a reference to an object */
271         void (*put_object)(struct fscache_object *object,
272                            enum fscache_obj_ref_trace why);
273 
274         /* sync a cache */
275         void (*sync_cache)(struct fscache_cache *cache);
276 
277         /* notification that the attributes of a non-index object (such as
278          * i_size) have changed */
279         int (*attr_changed)(struct fscache_object *object);
280 
281         /* reserve space for an object's data and associated metadata */
282         int (*reserve_space)(struct fscache_object *object, loff_t i_size);
283 
284         /* request a backing block for a page be read or allocated in the
285          * cache */
286         fscache_page_retrieval_func_t read_or_alloc_page;
287 
288         /* request backing blocks for a list of pages be read or allocated in
289          * the cache */
290         fscache_pages_retrieval_func_t read_or_alloc_pages;
291 
292         /* request a backing block for a page be allocated in the cache so that
293          * it can be written directly */
294         fscache_page_retrieval_func_t allocate_page;
295 
296         /* request backing blocks for pages be allocated in the cache so that
297          * they can be written directly */
298         fscache_pages_retrieval_func_t allocate_pages;
299 
300         /* write a page to its backing block in the cache */
301         int (*write_page)(struct fscache_storage *op, struct page *page);
302 
303         /* detach backing block from a page (optional)
304          * - must release the cookie lock before returning
305          * - may sleep
306          */
307         void (*uncache_page)(struct fscache_object *object,
308                              struct page *page);
309 
310         /* dissociate a cache from all the pages it was backing */
311         void (*dissociate_pages)(struct fscache_cache *cache);
312 };
313 
314 extern struct fscache_cookie fscache_fsdef_index;
315 
316 /*
317  * Event list for fscache_object::{event_mask,events}
318  */
319 enum {
320         FSCACHE_OBJECT_EV_NEW_CHILD,    /* T if object has a new child */
321         FSCACHE_OBJECT_EV_PARENT_READY, /* T if object's parent is ready */
322         FSCACHE_OBJECT_EV_UPDATE,       /* T if object should be updated */
323         FSCACHE_OBJECT_EV_INVALIDATE,   /* T if cache requested object invalidation */
324         FSCACHE_OBJECT_EV_CLEARED,      /* T if accessors all gone */
325         FSCACHE_OBJECT_EV_ERROR,        /* T if fatal error occurred during processing */
326         FSCACHE_OBJECT_EV_KILL,         /* T if netfs relinquished or cache withdrew object */
327         NR_FSCACHE_OBJECT_EVENTS
328 };
329 
330 #define FSCACHE_OBJECT_EVENTS_MASK ((1UL << NR_FSCACHE_OBJECT_EVENTS) - 1)
331 
332 /*
333  * States for object state machine.
334  */
335 struct fscache_transition {
336         unsigned long events;
337         const struct fscache_state *transit_to;
338 };
339 
340 struct fscache_state {
341         char name[24];
342         char short_name[8];
343         const struct fscache_state *(*work)(struct fscache_object *object,
344                                             int event);
345         const struct fscache_transition transitions[];
346 };
347 
348 /*
349  * on-disk cache file or index handle
350  */
351 struct fscache_object {
352         const struct fscache_state *state;      /* Object state machine state */
353         const struct fscache_transition *oob_table; /* OOB state transition table */
354         int                     debug_id;       /* debugging ID */
355         int                     n_children;     /* number of child objects */
356         int                     n_ops;          /* number of extant ops on object */
357         int                     n_obj_ops;      /* number of object ops outstanding on object */
358         int                     n_in_progress;  /* number of ops in progress */
359         int                     n_exclusive;    /* number of exclusive ops queued or in progress */
360         atomic_t                n_reads;        /* number of read ops in progress */
361         spinlock_t              lock;           /* state and operations lock */
362 
363         unsigned long           lookup_jif;     /* time at which lookup started */
364         unsigned long           oob_event_mask; /* OOB events this object is interested in */
365         unsigned long           event_mask;     /* events this object is interested in */
366         unsigned long           events;         /* events to be processed by this object
367                                                  * (order is important - using fls) */
368 
369         unsigned long           flags;
370 #define FSCACHE_OBJECT_LOCK             0       /* T if object is busy being processed */
371 #define FSCACHE_OBJECT_PENDING_WRITE    1       /* T if object has pending write */
372 #define FSCACHE_OBJECT_WAITING          2       /* T if object is waiting on its parent */
373 #define FSCACHE_OBJECT_IS_LIVE          3       /* T if object is not withdrawn or relinquished */
374 #define FSCACHE_OBJECT_IS_LOOKED_UP     4       /* T if object has been looked up */
375 #define FSCACHE_OBJECT_IS_AVAILABLE     5       /* T if object has become active */
376 #define FSCACHE_OBJECT_RETIRED          6       /* T if object was retired on relinquishment */
377 #define FSCACHE_OBJECT_KILLED_BY_CACHE  7       /* T if object was killed by the cache */
378 #define FSCACHE_OBJECT_RUN_AFTER_DEAD   8       /* T if object has been dispatched after death */
379 
380         struct list_head        cache_link;     /* link in cache->object_list */
381         struct hlist_node       cookie_link;    /* link in cookie->backing_objects */
382         struct fscache_cache    *cache;         /* cache that supplied this object */
383         struct fscache_cookie   *cookie;        /* netfs's file/index object */
384         struct fscache_object   *parent;        /* parent object */
385         struct work_struct      work;           /* attention scheduling record */
386         struct list_head        dependents;     /* FIFO of dependent objects */
387         struct list_head        dep_link;       /* link in parent's dependents list */
388         struct list_head        pending_ops;    /* unstarted operations on this object */
389 #ifdef CONFIG_FSCACHE_OBJECT_LIST
390         struct rb_node          objlist_link;   /* link in global object list */
391 #endif
392         pgoff_t                 store_limit;    /* current storage limit */
393         loff_t                  store_limit_l;  /* current storage limit */
394 };
395 
396 extern void fscache_object_init(struct fscache_object *, struct fscache_cookie *,
397                                 struct fscache_cache *);
398 extern void fscache_object_destroy(struct fscache_object *);
399 
400 extern void fscache_object_lookup_negative(struct fscache_object *object);
401 extern void fscache_obtained_object(struct fscache_object *object);
402 
403 static inline bool fscache_object_is_live(struct fscache_object *object)
404 {
405         return test_bit(FSCACHE_OBJECT_IS_LIVE, &object->flags);
406 }
407 
408 static inline bool fscache_object_is_dying(struct fscache_object *object)
409 {
410         return !fscache_object_is_live(object);
411 }
412 
413 static inline bool fscache_object_is_available(struct fscache_object *object)
414 {
415         return test_bit(FSCACHE_OBJECT_IS_AVAILABLE, &object->flags);
416 }
417 
418 static inline bool fscache_cache_is_broken(struct fscache_object *object)
419 {
420         return test_bit(FSCACHE_IOERROR, &object->cache->flags);
421 }
422 
423 static inline bool fscache_object_is_active(struct fscache_object *object)
424 {
425         return fscache_object_is_available(object) &&
426                 fscache_object_is_live(object) &&
427                 !fscache_cache_is_broken(object);
428 }
429 
430 /**
431  * fscache_object_destroyed - Note destruction of an object in a cache
432  * @cache: The cache from which the object came
433  *
434  * Note the destruction and deallocation of an object record in a cache.
435  */
436 static inline void fscache_object_destroyed(struct fscache_cache *cache)
437 {
438         if (atomic_dec_and_test(&cache->object_count))
439                 wake_up_all(&fscache_cache_cleared_wq);
440 }
441 
442 /**
443  * fscache_object_lookup_error - Note an object encountered an error
444  * @object: The object on which the error was encountered
445  *
446  * Note that an object encountered a fatal error (usually an I/O error) and
447  * that it should be withdrawn as soon as possible.
448  */
449 static inline void fscache_object_lookup_error(struct fscache_object *object)
450 {
451         set_bit(FSCACHE_OBJECT_EV_ERROR, &object->events);
452 }
453 
454 /**
455  * fscache_set_store_limit - Set the maximum size to be stored in an object
456  * @object: The object to set the maximum on
457  * @i_size: The limit to set in bytes
458  *
459  * Set the maximum size an object is permitted to reach, implying the highest
460  * byte that may be written.  Intended to be called by the attr_changed() op.
461  *
462  * See Documentation/filesystems/caching/backend-api.txt for a complete
463  * description.
464  */
465 static inline
466 void fscache_set_store_limit(struct fscache_object *object, loff_t i_size)
467 {
468         object->store_limit_l = i_size;
469         object->store_limit = i_size >> PAGE_SHIFT;
470         if (i_size & ~PAGE_MASK)
471                 object->store_limit++;
472 }
473 
474 /**
475  * fscache_end_io - End a retrieval operation on a page
476  * @op: The FS-Cache operation covering the retrieval
477  * @page: The page that was to be fetched
478  * @error: The error code (0 if successful)
479  *
480  * Note the end of an operation to retrieve a page, as covered by a particular
481  * operation record.
482  */
483 static inline void fscache_end_io(struct fscache_retrieval *op,
484                                   struct page *page, int error)
485 {
486         op->end_io_func(page, op->context, error);
487 }
488 
489 static inline void __fscache_use_cookie(struct fscache_cookie *cookie)
490 {
491         atomic_inc(&cookie->n_active);
492 }
493 
494 /**
495  * fscache_use_cookie - Request usage of cookie attached to an object
496  * @object: Object description
497  * 
498  * Request usage of the cookie attached to an object.  NULL is returned if the
499  * relinquishment had reduced the cookie usage count to 0.
500  */
501 static inline bool fscache_use_cookie(struct fscache_object *object)
502 {
503         struct fscache_cookie *cookie = object->cookie;
504         return atomic_inc_not_zero(&cookie->n_active) != 0;
505 }
506 
507 static inline bool __fscache_unuse_cookie(struct fscache_cookie *cookie)
508 {
509         return atomic_dec_and_test(&cookie->n_active);
510 }
511 
512 static inline void __fscache_wake_unused_cookie(struct fscache_cookie *cookie)
513 {
514         wake_up_var(&cookie->n_active);
515 }
516 
517 /**
518  * fscache_unuse_cookie - Cease usage of cookie attached to an object
519  * @object: Object description
520  * 
521  * Cease usage of the cookie attached to an object.  When the users count
522  * reaches zero then the cookie relinquishment will be permitted to proceed.
523  */
524 static inline void fscache_unuse_cookie(struct fscache_object *object)
525 {
526         struct fscache_cookie *cookie = object->cookie;
527         if (__fscache_unuse_cookie(cookie))
528                 __fscache_wake_unused_cookie(cookie);
529 }
530 
531 /*
532  * out-of-line cache backend functions
533  */
534 extern __printf(3, 4)
535 void fscache_init_cache(struct fscache_cache *cache,
536                         const struct fscache_cache_ops *ops,
537                         const char *idfmt, ...);
538 
539 extern int fscache_add_cache(struct fscache_cache *cache,
540                              struct fscache_object *fsdef,
541                              const char *tagname);
542 extern void fscache_withdraw_cache(struct fscache_cache *cache);
543 
544 extern void fscache_io_error(struct fscache_cache *cache);
545 
546 extern void fscache_mark_page_cached(struct fscache_retrieval *op,
547                                      struct page *page);
548 
549 extern void fscache_mark_pages_cached(struct fscache_retrieval *op,
550                                       struct pagevec *pagevec);
551 
552 extern bool fscache_object_sleep_till_congested(signed long *timeoutp);
553 
554 extern enum fscache_checkaux fscache_check_aux(struct fscache_object *object,
555                                                const void *data,
556                                                uint16_t datalen,
557                                                loff_t object_size);
558 
559 extern void fscache_object_retrying_stale(struct fscache_object *object);
560 
561 enum fscache_why_object_killed {
562         FSCACHE_OBJECT_IS_STALE,
563         FSCACHE_OBJECT_NO_SPACE,
564         FSCACHE_OBJECT_WAS_RETIRED,
565         FSCACHE_OBJECT_WAS_CULLED,
566 };
567 extern void fscache_object_mark_killed(struct fscache_object *object,
568                                        enum fscache_why_object_killed why);
569 
570 #endif /* _LINUX_FSCACHE_CACHE_H */
571 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp