1 /* SPDX-License-Identifier: GPL-2.0-or-later * 1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /* General netfs cache on cache files internal 2 /* General netfs cache on cache files internal defs
3 * 3 *
4 * Copyright (C) 2021 Red Hat, Inc. All Rights 4 * Copyright (C) 2021 Red Hat, Inc. All Rights Reserved.
5 * Written by David Howells (dhowells@redhat.c 5 * Written by David Howells (dhowells@redhat.com)
6 */ 6 */
7 7
8 #ifdef pr_fmt 8 #ifdef pr_fmt
9 #undef pr_fmt 9 #undef pr_fmt
10 #endif 10 #endif
11 11
12 #define pr_fmt(fmt) "CacheFiles: " fmt 12 #define pr_fmt(fmt) "CacheFiles: " fmt
13 13
14 14
15 #include <linux/fscache-cache.h> 15 #include <linux/fscache-cache.h>
16 #include <linux/cred.h> 16 #include <linux/cred.h>
17 #include <linux/security.h> 17 #include <linux/security.h>
18 #include <linux/xarray.h> 18 #include <linux/xarray.h>
19 #include <linux/cachefiles.h> 19 #include <linux/cachefiles.h>
20 20
21 #define CACHEFILES_DIO_BLOCK_SIZE 4096 21 #define CACHEFILES_DIO_BLOCK_SIZE 4096
22 22
23 struct cachefiles_cache; 23 struct cachefiles_cache;
24 struct cachefiles_object; 24 struct cachefiles_object;
25 25
26 enum cachefiles_content { 26 enum cachefiles_content {
27 /* These values are saved on disk */ 27 /* These values are saved on disk */
28 CACHEFILES_CONTENT_NO_DATA = 0, / 28 CACHEFILES_CONTENT_NO_DATA = 0, /* No content stored */
29 CACHEFILES_CONTENT_SINGLE = 1, / 29 CACHEFILES_CONTENT_SINGLE = 1, /* Content is monolithic, all is present */
30 CACHEFILES_CONTENT_ALL = 2, / 30 CACHEFILES_CONTENT_ALL = 2, /* Content is all present, no map */
31 CACHEFILES_CONTENT_BACKFS_MAP = 3, / 31 CACHEFILES_CONTENT_BACKFS_MAP = 3, /* Content is piecemeal, mapped through backing fs */
32 CACHEFILES_CONTENT_DIRTY = 4, / 32 CACHEFILES_CONTENT_DIRTY = 4, /* Content is dirty (only seen on disk) */
33 nr__cachefiles_content 33 nr__cachefiles_content
34 }; 34 };
35 35
36 /* 36 /*
37 * Cached volume representation. 37 * Cached volume representation.
38 */ 38 */
39 struct cachefiles_volume { 39 struct cachefiles_volume {
40 struct cachefiles_cache *cache 40 struct cachefiles_cache *cache;
41 struct list_head cache_ 41 struct list_head cache_link; /* Link in cache->volumes */
42 struct fscache_volume *vcook 42 struct fscache_volume *vcookie; /* The netfs's representation */
43 struct dentry *dentr 43 struct dentry *dentry; /* The volume dentry */
44 struct dentry *fanou 44 struct dentry *fanout[256]; /* Fanout subdirs */
45 }; 45 };
46 46
47 enum cachefiles_object_state { 47 enum cachefiles_object_state {
48 CACHEFILES_ONDEMAND_OBJSTATE_CLOSE, /* 48 CACHEFILES_ONDEMAND_OBJSTATE_CLOSE, /* Anonymous fd closed by daemon or initial state */
49 CACHEFILES_ONDEMAND_OBJSTATE_OPEN, /* 49 CACHEFILES_ONDEMAND_OBJSTATE_OPEN, /* Anonymous fd associated with object is available */
50 CACHEFILES_ONDEMAND_OBJSTATE_REOPENING 50 CACHEFILES_ONDEMAND_OBJSTATE_REOPENING, /* Object that was closed and is being reopened. */
51 CACHEFILES_ONDEMAND_OBJSTATE_DROPPING, <<
52 }; 51 };
53 52
54 struct cachefiles_ondemand_info { 53 struct cachefiles_ondemand_info {
55 struct work_struct ondema 54 struct work_struct ondemand_work;
56 int ondema 55 int ondemand_id;
57 enum cachefiles_object_state state; 56 enum cachefiles_object_state state;
58 struct cachefiles_object *objec 57 struct cachefiles_object *object;
59 spinlock_t lock; <<
60 }; 58 };
61 59
62 /* 60 /*
63 * Backing file state. 61 * Backing file state.
64 */ 62 */
65 struct cachefiles_object { 63 struct cachefiles_object {
66 struct fscache_cookie *cooki 64 struct fscache_cookie *cookie; /* Netfs data storage object cookie */
67 struct cachefiles_volume *volum 65 struct cachefiles_volume *volume; /* Cache volume that holds this object */
68 struct list_head cache_ 66 struct list_head cache_link; /* Link in cache->*_list */
69 struct file *file; 67 struct file *file; /* The file representing this object */
70 char *d_nam 68 char *d_name; /* Backing file name */
71 int debug_ 69 int debug_id;
72 spinlock_t lock; 70 spinlock_t lock;
73 refcount_t ref; 71 refcount_t ref;
74 u8 d_name 72 u8 d_name_len; /* Length of filename */
75 enum cachefiles_content conten 73 enum cachefiles_content content_info:8; /* Info about content presence */
76 unsigned long flags; 74 unsigned long flags;
77 #define CACHEFILES_OBJECT_USING_TMPFILE 0 75 #define CACHEFILES_OBJECT_USING_TMPFILE 0 /* Have an unlinked tmpfile */
78 #ifdef CONFIG_CACHEFILES_ONDEMAND 76 #ifdef CONFIG_CACHEFILES_ONDEMAND
79 struct cachefiles_ondemand_info *ondem 77 struct cachefiles_ondemand_info *ondemand;
80 #endif 78 #endif
81 }; 79 };
82 80
83 #define CACHEFILES_ONDEMAND_ID_CLOSED -1 81 #define CACHEFILES_ONDEMAND_ID_CLOSED -1
84 82
85 /* 83 /*
86 * Cache files cache definition 84 * Cache files cache definition
87 */ 85 */
88 struct cachefiles_cache { 86 struct cachefiles_cache {
89 struct fscache_cache *cache 87 struct fscache_cache *cache; /* Cache cookie */
90 struct vfsmount *mnt; 88 struct vfsmount *mnt; /* mountpoint holding the cache */
91 struct dentry *store 89 struct dentry *store; /* Directory into which live objects go */
92 struct dentry *grave 90 struct dentry *graveyard; /* directory into which dead objects go */
93 struct file *cache 91 struct file *cachefilesd; /* manager daemon handle */
94 struct list_head volume 92 struct list_head volumes; /* List of volume objects */
95 struct list_head object 93 struct list_head object_list; /* List of active objects */
96 spinlock_t object 94 spinlock_t object_list_lock; /* Lock for volumes and object_list */
97 const struct cred *cache 95 const struct cred *cache_cred; /* security override for accessing cache */
98 struct mutex daemon 96 struct mutex daemon_mutex; /* command serialisation mutex */
99 wait_queue_head_t daemon 97 wait_queue_head_t daemon_pollwq; /* poll waitqueue for daemon */
100 atomic_t gravec 98 atomic_t gravecounter; /* graveyard uniquifier */
101 atomic_t f_rele 99 atomic_t f_released; /* number of objects released lately */
102 atomic_long_t b_rele 100 atomic_long_t b_released; /* number of blocks released lately */
103 atomic_long_t b_writ 101 atomic_long_t b_writing; /* Number of blocks being written */
104 unsigned frun_p 102 unsigned frun_percent; /* when to stop culling (% files) */
105 unsigned fcull_ 103 unsigned fcull_percent; /* when to start culling (% files) */
106 unsigned fstop_ 104 unsigned fstop_percent; /* when to stop allocating (% files) */
107 unsigned brun_p 105 unsigned brun_percent; /* when to stop culling (% blocks) */
108 unsigned bcull_ 106 unsigned bcull_percent; /* when to start culling (% blocks) */
109 unsigned bstop_ 107 unsigned bstop_percent; /* when to stop allocating (% blocks) */
110 unsigned bsize; 108 unsigned bsize; /* cache's block size */
111 unsigned bshift 109 unsigned bshift; /* ilog2(bsize) */
112 uint64_t frun; 110 uint64_t frun; /* when to stop culling */
113 uint64_t fcull; 111 uint64_t fcull; /* when to start culling */
114 uint64_t fstop; 112 uint64_t fstop; /* when to stop allocating */
115 sector_t brun; 113 sector_t brun; /* when to stop culling */
116 sector_t bcull; 114 sector_t bcull; /* when to start culling */
117 sector_t bstop; 115 sector_t bstop; /* when to stop allocating */
118 unsigned long flags; 116 unsigned long flags;
119 #define CACHEFILES_READY 0 117 #define CACHEFILES_READY 0 /* T if cache prepared */
120 #define CACHEFILES_DEAD 1 118 #define CACHEFILES_DEAD 1 /* T if cache dead */
121 #define CACHEFILES_CULLING 2 119 #define CACHEFILES_CULLING 2 /* T if cull engaged */
122 #define CACHEFILES_STATE_CHANGED 3 120 #define CACHEFILES_STATE_CHANGED 3 /* T if state changed (poll trigger) */
123 #define CACHEFILES_ONDEMAND_MODE 4 121 #define CACHEFILES_ONDEMAND_MODE 4 /* T if in on-demand read mode */
124 char *rootd 122 char *rootdirname; /* name of cache root directory */
125 char *secct 123 char *secctx; /* LSM security context */
126 char *tag; 124 char *tag; /* cache binding tag */
127 refcount_t unbind 125 refcount_t unbind_pincount;/* refcount to do daemon unbind */
128 struct xarray reqs; 126 struct xarray reqs; /* xarray of pending on-demand requests */
129 unsigned long req_id 127 unsigned long req_id_next;
130 struct xarray ondema 128 struct xarray ondemand_ids; /* xarray for ondemand_id allocation */
131 u32 ondema 129 u32 ondemand_id_next;
132 u32 msg_id <<
133 }; 130 };
134 131
135 static inline bool cachefiles_in_ondemand_mode 132 static inline bool cachefiles_in_ondemand_mode(struct cachefiles_cache *cache)
136 { 133 {
137 return IS_ENABLED(CONFIG_CACHEFILES_ON 134 return IS_ENABLED(CONFIG_CACHEFILES_ONDEMAND) &&
138 test_bit(CACHEFILES_ONDEMAND_M 135 test_bit(CACHEFILES_ONDEMAND_MODE, &cache->flags);
139 } 136 }
140 137
141 struct cachefiles_req { 138 struct cachefiles_req {
142 struct cachefiles_object *object; 139 struct cachefiles_object *object;
143 struct completion done; 140 struct completion done;
144 refcount_t ref; <<
145 int error; 141 int error;
146 struct cachefiles_msg msg; 142 struct cachefiles_msg msg;
147 }; 143 };
148 144
149 #define CACHEFILES_REQ_NEW XA_MARK_1 145 #define CACHEFILES_REQ_NEW XA_MARK_1
150 146
151 #include <trace/events/cachefiles.h> 147 #include <trace/events/cachefiles.h>
152 148
153 static inline 149 static inline
154 struct file *cachefiles_cres_file(struct netfs 150 struct file *cachefiles_cres_file(struct netfs_cache_resources *cres)
155 { 151 {
156 return cres->cache_priv2; 152 return cres->cache_priv2;
157 } 153 }
158 154
159 static inline 155 static inline
160 struct cachefiles_object *cachefiles_cres_obje 156 struct cachefiles_object *cachefiles_cres_object(struct netfs_cache_resources *cres)
161 { 157 {
162 return fscache_cres_cookie(cres)->cach 158 return fscache_cres_cookie(cres)->cache_priv;
163 } 159 }
164 160
165 /* 161 /*
166 * note change of state for daemon 162 * note change of state for daemon
167 */ 163 */
168 static inline void cachefiles_state_changed(st 164 static inline void cachefiles_state_changed(struct cachefiles_cache *cache)
169 { 165 {
170 set_bit(CACHEFILES_STATE_CHANGED, &cac 166 set_bit(CACHEFILES_STATE_CHANGED, &cache->flags);
171 wake_up_all(&cache->daemon_pollwq); 167 wake_up_all(&cache->daemon_pollwq);
172 } 168 }
173 169
174 /* 170 /*
175 * cache.c 171 * cache.c
176 */ 172 */
177 extern int cachefiles_add_cache(struct cachefi 173 extern int cachefiles_add_cache(struct cachefiles_cache *cache);
178 extern void cachefiles_withdraw_cache(struct c 174 extern void cachefiles_withdraw_cache(struct cachefiles_cache *cache);
179 175
180 enum cachefiles_has_space_for { 176 enum cachefiles_has_space_for {
181 cachefiles_has_space_check, 177 cachefiles_has_space_check,
182 cachefiles_has_space_for_write, 178 cachefiles_has_space_for_write,
183 cachefiles_has_space_for_create, 179 cachefiles_has_space_for_create,
184 }; 180 };
185 extern int cachefiles_has_space(struct cachefi 181 extern int cachefiles_has_space(struct cachefiles_cache *cache,
186 unsigned fnr, 182 unsigned fnr, unsigned bnr,
187 enum cachefile 183 enum cachefiles_has_space_for reason);
188 184
189 /* 185 /*
190 * daemon.c 186 * daemon.c
191 */ 187 */
192 extern const struct file_operations cachefiles 188 extern const struct file_operations cachefiles_daemon_fops;
193 extern void cachefiles_flush_reqs(struct cache <<
194 extern void cachefiles_get_unbind_pincount(str 189 extern void cachefiles_get_unbind_pincount(struct cachefiles_cache *cache);
195 extern void cachefiles_put_unbind_pincount(str 190 extern void cachefiles_put_unbind_pincount(struct cachefiles_cache *cache);
196 191
197 /* 192 /*
198 * error_inject.c 193 * error_inject.c
199 */ 194 */
200 #ifdef CONFIG_CACHEFILES_ERROR_INJECTION 195 #ifdef CONFIG_CACHEFILES_ERROR_INJECTION
201 extern unsigned int cachefiles_error_injection 196 extern unsigned int cachefiles_error_injection_state;
202 extern int cachefiles_register_error_injection 197 extern int cachefiles_register_error_injection(void);
203 extern void cachefiles_unregister_error_inject 198 extern void cachefiles_unregister_error_injection(void);
204 199
205 #else 200 #else
206 #define cachefiles_error_injection_state 0 201 #define cachefiles_error_injection_state 0
207 202
208 static inline int cachefiles_register_error_in 203 static inline int cachefiles_register_error_injection(void)
209 { 204 {
210 return 0; 205 return 0;
211 } 206 }
212 207
213 static inline void cachefiles_unregister_error 208 static inline void cachefiles_unregister_error_injection(void)
214 { 209 {
215 } 210 }
216 #endif 211 #endif
217 212
218 213
219 static inline int cachefiles_inject_read_error 214 static inline int cachefiles_inject_read_error(void)
220 { 215 {
221 return cachefiles_error_injection_stat 216 return cachefiles_error_injection_state & 2 ? -EIO : 0;
222 } 217 }
223 218
224 static inline int cachefiles_inject_write_erro 219 static inline int cachefiles_inject_write_error(void)
225 { 220 {
226 return cachefiles_error_injection_stat 221 return cachefiles_error_injection_state & 2 ? -EIO :
227 cachefiles_error_injection_sta 222 cachefiles_error_injection_state & 1 ? -ENOSPC :
228 0; 223 0;
229 } 224 }
230 225
231 static inline int cachefiles_inject_remove_err 226 static inline int cachefiles_inject_remove_error(void)
232 { 227 {
233 return cachefiles_error_injection_stat 228 return cachefiles_error_injection_state & 2 ? -EIO : 0;
234 } 229 }
235 230
236 /* 231 /*
237 * interface.c 232 * interface.c
238 */ 233 */
239 extern const struct fscache_cache_ops cachefil 234 extern const struct fscache_cache_ops cachefiles_cache_ops;
240 extern void cachefiles_see_object(struct cache 235 extern void cachefiles_see_object(struct cachefiles_object *object,
241 enum cachefi 236 enum cachefiles_obj_ref_trace why);
242 extern struct cachefiles_object *cachefiles_gr 237 extern struct cachefiles_object *cachefiles_grab_object(struct cachefiles_object *object,
243 238 enum cachefiles_obj_ref_trace why);
244 extern void cachefiles_put_object(struct cache 239 extern void cachefiles_put_object(struct cachefiles_object *object,
245 enum cachefi 240 enum cachefiles_obj_ref_trace why);
246 241
247 /* 242 /*
248 * io.c 243 * io.c
249 */ 244 */
250 extern bool cachefiles_begin_operation(struct 245 extern bool cachefiles_begin_operation(struct netfs_cache_resources *cres,
251 enum fs 246 enum fscache_want_state want_state);
252 extern int __cachefiles_prepare_write(struct c 247 extern int __cachefiles_prepare_write(struct cachefiles_object *object,
253 struct f 248 struct file *file,
254 loff_t * 249 loff_t *_start, size_t *_len, size_t upper_len,
255 bool no_ 250 bool no_space_allocated_yet);
256 extern int __cachefiles_write(struct cachefile 251 extern int __cachefiles_write(struct cachefiles_object *object,
257 struct file *fil 252 struct file *file,
258 loff_t start_pos 253 loff_t start_pos,
259 struct iov_iter 254 struct iov_iter *iter,
260 netfs_io_termina 255 netfs_io_terminated_t term_func,
261 void *term_func_ 256 void *term_func_priv);
262 257
263 /* 258 /*
264 * key.c 259 * key.c
265 */ 260 */
266 extern bool cachefiles_cook_key(struct cachefi 261 extern bool cachefiles_cook_key(struct cachefiles_object *object);
267 262
268 /* 263 /*
269 * main.c 264 * main.c
270 */ 265 */
271 extern struct kmem_cache *cachefiles_object_ja 266 extern struct kmem_cache *cachefiles_object_jar;
272 267
273 /* 268 /*
274 * namei.c 269 * namei.c
275 */ 270 */
276 extern void cachefiles_unmark_inode_in_use(str 271 extern void cachefiles_unmark_inode_in_use(struct cachefiles_object *object,
277 str 272 struct file *file);
278 extern int cachefiles_bury_object(struct cache 273 extern int cachefiles_bury_object(struct cachefiles_cache *cache,
279 struct cache 274 struct cachefiles_object *object,
280 struct dentr 275 struct dentry *dir,
281 struct dentr 276 struct dentry *rep,
282 enum fscache 277 enum fscache_why_object_killed why);
283 extern int cachefiles_delete_object(struct cac 278 extern int cachefiles_delete_object(struct cachefiles_object *object,
284 enum fscac 279 enum fscache_why_object_killed why);
285 extern bool cachefiles_look_up_object(struct c 280 extern bool cachefiles_look_up_object(struct cachefiles_object *object);
286 extern struct dentry *cachefiles_get_directory 281 extern struct dentry *cachefiles_get_directory(struct cachefiles_cache *cache,
287 282 struct dentry *dir,
288 283 const char *name,
289 284 bool *_is_new);
290 extern void cachefiles_put_directory(struct de 285 extern void cachefiles_put_directory(struct dentry *dir);
291 286
292 extern int cachefiles_cull(struct cachefiles_c 287 extern int cachefiles_cull(struct cachefiles_cache *cache, struct dentry *dir,
293 char *filename); 288 char *filename);
294 289
295 extern int cachefiles_check_in_use(struct cach 290 extern int cachefiles_check_in_use(struct cachefiles_cache *cache,
296 struct dent 291 struct dentry *dir, char *filename);
297 extern struct file *cachefiles_create_tmpfile( 292 extern struct file *cachefiles_create_tmpfile(struct cachefiles_object *object);
298 extern bool cachefiles_commit_tmpfile(struct c 293 extern bool cachefiles_commit_tmpfile(struct cachefiles_cache *cache,
299 struct c 294 struct cachefiles_object *object);
300 295
301 /* 296 /*
302 * ondemand.c 297 * ondemand.c
303 */ 298 */
304 #ifdef CONFIG_CACHEFILES_ONDEMAND 299 #ifdef CONFIG_CACHEFILES_ONDEMAND
305 extern ssize_t cachefiles_ondemand_daemon_read 300 extern ssize_t cachefiles_ondemand_daemon_read(struct cachefiles_cache *cache,
306 char _ 301 char __user *_buffer, size_t buflen);
307 302
308 extern int cachefiles_ondemand_copen(struct ca 303 extern int cachefiles_ondemand_copen(struct cachefiles_cache *cache,
309 char *arg 304 char *args);
310 305
311 extern int cachefiles_ondemand_restore(struct 306 extern int cachefiles_ondemand_restore(struct cachefiles_cache *cache,
312 char * 307 char *args);
313 308
314 extern int cachefiles_ondemand_init_object(str 309 extern int cachefiles_ondemand_init_object(struct cachefiles_object *object);
315 extern void cachefiles_ondemand_clean_object(s 310 extern void cachefiles_ondemand_clean_object(struct cachefiles_object *object);
316 311
317 extern int cachefiles_ondemand_read(struct cac 312 extern int cachefiles_ondemand_read(struct cachefiles_object *object,
318 loff_t pos 313 loff_t pos, size_t len);
319 314
320 extern int cachefiles_ondemand_init_obj_info(s 315 extern int cachefiles_ondemand_init_obj_info(struct cachefiles_object *obj,
321 struct 316 struct cachefiles_volume *volume);
322 extern void cachefiles_ondemand_deinit_obj_inf 317 extern void cachefiles_ondemand_deinit_obj_info(struct cachefiles_object *obj);
323 318
324 #define CACHEFILES_OBJECT_STATE_FUNCS(_state, 319 #define CACHEFILES_OBJECT_STATE_FUNCS(_state, _STATE) \
325 static inline bool 320 static inline bool \
326 cachefiles_ondemand_object_is_##_state(const s 321 cachefiles_ondemand_object_is_##_state(const struct cachefiles_object *object) \
327 { 322 { \
328 return object->ondemand->state == CACH 323 return object->ondemand->state == CACHEFILES_ONDEMAND_OBJSTATE_##_STATE; \
329 } 324 } \
330 325 \
331 static inline void 326 static inline void \
332 cachefiles_ondemand_set_object_##_state(struct 327 cachefiles_ondemand_set_object_##_state(struct cachefiles_object *object) \
333 { 328 { \
334 object->ondemand->state = CACHEFILES_O 329 object->ondemand->state = CACHEFILES_ONDEMAND_OBJSTATE_##_STATE; \
335 } 330 }
336 331
337 CACHEFILES_OBJECT_STATE_FUNCS(open, OPEN); 332 CACHEFILES_OBJECT_STATE_FUNCS(open, OPEN);
338 CACHEFILES_OBJECT_STATE_FUNCS(close, CLOSE); 333 CACHEFILES_OBJECT_STATE_FUNCS(close, CLOSE);
339 CACHEFILES_OBJECT_STATE_FUNCS(reopening, REOPE 334 CACHEFILES_OBJECT_STATE_FUNCS(reopening, REOPENING);
340 CACHEFILES_OBJECT_STATE_FUNCS(dropping, DROPPI <<
341 335
342 static inline bool cachefiles_ondemand_is_reop 336 static inline bool cachefiles_ondemand_is_reopening_read(struct cachefiles_req *req)
343 { 337 {
344 return cachefiles_ondemand_object_is_r 338 return cachefiles_ondemand_object_is_reopening(req->object) &&
345 req->msg.opcode == CAC 339 req->msg.opcode == CACHEFILES_OP_READ;
346 } 340 }
347 341
348 #else 342 #else
349 static inline ssize_t cachefiles_ondemand_daem 343 static inline ssize_t cachefiles_ondemand_daemon_read(struct cachefiles_cache *cache,
350 char _ 344 char __user *_buffer, size_t buflen)
351 { 345 {
352 return -EOPNOTSUPP; 346 return -EOPNOTSUPP;
353 } 347 }
354 348
355 static inline int cachefiles_ondemand_init_obj 349 static inline int cachefiles_ondemand_init_object(struct cachefiles_object *object)
356 { 350 {
357 return 0; 351 return 0;
358 } 352 }
359 353
360 static inline void cachefiles_ondemand_clean_o 354 static inline void cachefiles_ondemand_clean_object(struct cachefiles_object *object)
361 { 355 {
362 } 356 }
363 357
364 static inline int cachefiles_ondemand_read(str 358 static inline int cachefiles_ondemand_read(struct cachefiles_object *object,
365 lof 359 loff_t pos, size_t len)
366 { 360 {
367 return -EOPNOTSUPP; 361 return -EOPNOTSUPP;
368 } 362 }
369 363
370 static inline int cachefiles_ondemand_init_obj 364 static inline int cachefiles_ondemand_init_obj_info(struct cachefiles_object *obj,
371 365 struct cachefiles_volume *volume)
372 { 366 {
373 return 0; 367 return 0;
374 } 368 }
375 static inline void cachefiles_ondemand_deinit_ 369 static inline void cachefiles_ondemand_deinit_obj_info(struct cachefiles_object *obj)
376 { 370 {
377 } 371 }
378 372
379 static inline bool cachefiles_ondemand_is_reop 373 static inline bool cachefiles_ondemand_is_reopening_read(struct cachefiles_req *req)
380 { 374 {
381 return false; 375 return false;
382 } 376 }
383 #endif 377 #endif
384 378
385 /* 379 /*
386 * security.c 380 * security.c
387 */ 381 */
388 extern int cachefiles_get_security_ID(struct c 382 extern int cachefiles_get_security_ID(struct cachefiles_cache *cache);
389 extern int cachefiles_determine_cache_security 383 extern int cachefiles_determine_cache_security(struct cachefiles_cache *cache,
390 384 struct dentry *root,
391 385 const struct cred **_saved_cred);
392 386
393 static inline void cachefiles_begin_secure(str 387 static inline void cachefiles_begin_secure(struct cachefiles_cache *cache,
394 con 388 const struct cred **_saved_cred)
395 { 389 {
396 *_saved_cred = override_creds(cache->c 390 *_saved_cred = override_creds(cache->cache_cred);
397 } 391 }
398 392
399 static inline void cachefiles_end_secure(struc 393 static inline void cachefiles_end_secure(struct cachefiles_cache *cache,
400 const 394 const struct cred *saved_cred)
401 { 395 {
402 revert_creds(saved_cred); 396 revert_creds(saved_cred);
403 } 397 }
404 398
405 /* 399 /*
406 * volume.c 400 * volume.c
407 */ 401 */
408 void cachefiles_acquire_volume(struct fscache_ 402 void cachefiles_acquire_volume(struct fscache_volume *volume);
409 void cachefiles_free_volume(struct fscache_vol 403 void cachefiles_free_volume(struct fscache_volume *volume);
410 void cachefiles_withdraw_volume(struct cachefi 404 void cachefiles_withdraw_volume(struct cachefiles_volume *volume);
411 405
412 /* 406 /*
413 * xattr.c 407 * xattr.c
414 */ 408 */
415 extern int cachefiles_set_object_xattr(struct 409 extern int cachefiles_set_object_xattr(struct cachefiles_object *object);
416 extern int cachefiles_check_auxdata(struct cac 410 extern int cachefiles_check_auxdata(struct cachefiles_object *object,
417 struct fil 411 struct file *file);
418 extern int cachefiles_remove_object_xattr(stru 412 extern int cachefiles_remove_object_xattr(struct cachefiles_cache *cache,
419 stru 413 struct cachefiles_object *object,
420 stru 414 struct dentry *dentry);
421 extern void cachefiles_prepare_to_write(struct 415 extern void cachefiles_prepare_to_write(struct fscache_cookie *cookie);
422 extern bool cachefiles_set_volume_xattr(struct 416 extern bool cachefiles_set_volume_xattr(struct cachefiles_volume *volume);
423 extern int cachefiles_check_volume_xattr(struc 417 extern int cachefiles_check_volume_xattr(struct cachefiles_volume *volume);
424 418
425 /* 419 /*
426 * Error handling 420 * Error handling
427 */ 421 */
428 #define cachefiles_io_error(___cache, FMT, ... 422 #define cachefiles_io_error(___cache, FMT, ...) \
429 do { 423 do { \
430 pr_err("I/O Error: " FMT"\n", ##__VA_A 424 pr_err("I/O Error: " FMT"\n", ##__VA_ARGS__); \
431 fscache_io_error((___cache)->cache); 425 fscache_io_error((___cache)->cache); \
432 set_bit(CACHEFILES_DEAD, &(___cache)-> 426 set_bit(CACHEFILES_DEAD, &(___cache)->flags); \
433 if (cachefiles_in_ondemand_mode(___cac <<
434 cachefiles_flush_reqs(___cache <<
435 } while (0) 427 } while (0)
436 428
437 #define cachefiles_io_error_obj(object, FMT, . 429 #define cachefiles_io_error_obj(object, FMT, ...) \
438 do { 430 do { \
439 struct cachefiles_cache *___cache; 431 struct cachefiles_cache *___cache; \
440 432 \
441 ___cache = (object)->volume->cache; 433 ___cache = (object)->volume->cache; \
442 cachefiles_io_error(___cache, FMT " [o 434 cachefiles_io_error(___cache, FMT " [o=%08x]", ##__VA_ARGS__, \
443 (object)->debug_id 435 (object)->debug_id); \
444 } while (0) 436 } while (0)
445 437
446 438
447 /* 439 /*
448 * Debug tracing 440 * Debug tracing
449 */ 441 */
450 extern unsigned cachefiles_debug; 442 extern unsigned cachefiles_debug;
451 #define CACHEFILES_DEBUG_KENTER 1 443 #define CACHEFILES_DEBUG_KENTER 1
452 #define CACHEFILES_DEBUG_KLEAVE 2 444 #define CACHEFILES_DEBUG_KLEAVE 2
453 #define CACHEFILES_DEBUG_KDEBUG 4 445 #define CACHEFILES_DEBUG_KDEBUG 4
454 446
455 #define dbgprintk(FMT, ...) \ 447 #define dbgprintk(FMT, ...) \
456 printk(KERN_DEBUG "[%-6.6s] "FMT"\n", 448 printk(KERN_DEBUG "[%-6.6s] "FMT"\n", current->comm, ##__VA_ARGS__)
457 449
458 #define kenter(FMT, ...) dbgprintk("==> %s("FM 450 #define kenter(FMT, ...) dbgprintk("==> %s("FMT")", __func__, ##__VA_ARGS__)
459 #define kleave(FMT, ...) dbgprintk("<== %s()"F 451 #define kleave(FMT, ...) dbgprintk("<== %s()"FMT"", __func__, ##__VA_ARGS__)
460 #define kdebug(FMT, ...) dbgprintk(FMT, ##__VA 452 #define kdebug(FMT, ...) dbgprintk(FMT, ##__VA_ARGS__)
461 453
462 454
463 #if defined(__KDEBUG) 455 #if defined(__KDEBUG)
464 #define _enter(FMT, ...) kenter(FMT, ##__VA_AR 456 #define _enter(FMT, ...) kenter(FMT, ##__VA_ARGS__)
465 #define _leave(FMT, ...) kleave(FMT, ##__VA_AR 457 #define _leave(FMT, ...) kleave(FMT, ##__VA_ARGS__)
466 #define _debug(FMT, ...) kdebug(FMT, ##__VA_AR 458 #define _debug(FMT, ...) kdebug(FMT, ##__VA_ARGS__)
467 459
468 #elif defined(CONFIG_CACHEFILES_DEBUG) 460 #elif defined(CONFIG_CACHEFILES_DEBUG)
469 #define _enter(FMT, ...) 461 #define _enter(FMT, ...) \
470 do { 462 do { \
471 if (cachefiles_debug & CACHEFILES_DEBU 463 if (cachefiles_debug & CACHEFILES_DEBUG_KENTER) \
472 kenter(FMT, ##__VA_ARGS__); 464 kenter(FMT, ##__VA_ARGS__); \
473 } while (0) 465 } while (0)
474 466
475 #define _leave(FMT, ...) 467 #define _leave(FMT, ...) \
476 do { 468 do { \
477 if (cachefiles_debug & CACHEFILES_DEBU 469 if (cachefiles_debug & CACHEFILES_DEBUG_KLEAVE) \
478 kleave(FMT, ##__VA_ARGS__); 470 kleave(FMT, ##__VA_ARGS__); \
479 } while (0) 471 } while (0)
480 472
481 #define _debug(FMT, ...) 473 #define _debug(FMT, ...) \
482 do { 474 do { \
483 if (cachefiles_debug & CACHEFILES_DEBU 475 if (cachefiles_debug & CACHEFILES_DEBUG_KDEBUG) \
484 kdebug(FMT, ##__VA_ARGS__); 476 kdebug(FMT, ##__VA_ARGS__); \
485 } while (0) 477 } while (0)
486 478
487 #else 479 #else
488 #define _enter(FMT, ...) no_printk("==> %s("FM 480 #define _enter(FMT, ...) no_printk("==> %s("FMT")", __func__, ##__VA_ARGS__)
489 #define _leave(FMT, ...) no_printk("<== %s()"F 481 #define _leave(FMT, ...) no_printk("<== %s()"FMT"", __func__, ##__VA_ARGS__)
490 #define _debug(FMT, ...) no_printk(FMT, ##__VA 482 #define _debug(FMT, ...) no_printk(FMT, ##__VA_ARGS__)
491 #endif 483 #endif
492 484
493 #if 1 /* defined(__KDEBUGALL) */ 485 #if 1 /* defined(__KDEBUGALL) */
494 486
495 #define ASSERT(X) 487 #define ASSERT(X) \
496 do { 488 do { \
497 if (unlikely(!(X))) { 489 if (unlikely(!(X))) { \
498 pr_err("\n"); 490 pr_err("\n"); \
499 pr_err("Assertion failed\n"); 491 pr_err("Assertion failed\n"); \
500 BUG(); 492 BUG(); \
501 } 493 } \
502 } while (0) 494 } while (0)
503 495
504 #define ASSERTCMP(X, OP, Y) 496 #define ASSERTCMP(X, OP, Y) \
505 do { 497 do { \
506 if (unlikely(!((X) OP (Y)))) { 498 if (unlikely(!((X) OP (Y)))) { \
507 pr_err("\n"); 499 pr_err("\n"); \
508 pr_err("Assertion failed\n"); 500 pr_err("Assertion failed\n"); \
509 pr_err("%lx " #OP " %lx is fal 501 pr_err("%lx " #OP " %lx is false\n", \
510 (unsigned long)(X), (un 502 (unsigned long)(X), (unsigned long)(Y)); \
511 BUG(); 503 BUG(); \
512 } 504 } \
513 } while (0) 505 } while (0)
514 506
515 #define ASSERTIF(C, X) 507 #define ASSERTIF(C, X) \
516 do { 508 do { \
517 if (unlikely((C) && !(X))) { 509 if (unlikely((C) && !(X))) { \
518 pr_err("\n"); 510 pr_err("\n"); \
519 pr_err("Assertion failed\n"); 511 pr_err("Assertion failed\n"); \
520 BUG(); 512 BUG(); \
521 } 513 } \
522 } while (0) 514 } while (0)
523 515
524 #define ASSERTIFCMP(C, X, OP, Y) 516 #define ASSERTIFCMP(C, X, OP, Y) \
525 do { 517 do { \
526 if (unlikely((C) && !((X) OP (Y)))) { 518 if (unlikely((C) && !((X) OP (Y)))) { \
527 pr_err("\n"); 519 pr_err("\n"); \
528 pr_err("Assertion failed\n"); 520 pr_err("Assertion failed\n"); \
529 pr_err("%lx " #OP " %lx is fal 521 pr_err("%lx " #OP " %lx is false\n", \
530 (unsigned long)(X), (un 522 (unsigned long)(X), (unsigned long)(Y)); \
531 BUG(); 523 BUG(); \
532 } 524 } \
533 } while (0) 525 } while (0)
534 526
535 #else 527 #else
536 528
537 #define ASSERT(X) do {} 529 #define ASSERT(X) do {} while (0)
538 #define ASSERTCMP(X, OP, Y) do {} 530 #define ASSERTCMP(X, OP, Y) do {} while (0)
539 #define ASSERTIF(C, X) do {} 531 #define ASSERTIF(C, X) do {} while (0)
540 #define ASSERTIFCMP(C, X, OP, Y) do {} 532 #define ASSERTIFCMP(C, X, OP, Y) do {} while (0)
541 533
542 #endif 534 #endif
543 535
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