1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /* General netfs cache on cache files internal defs
15 #include <linux/fscache-cache.h>
40 	struct cachefiles_cache		*cache;  member
41 	struct list_head		cache_link;	/* Link in cache->volumes */
67 	struct cachefiles_volume	*volume;	/* Cache volume that holds this object */
68 	struct list_head		cache_link;	/* Link in cache->*_list */
83 #define CACHEFILES_ONDEMAND_ID_CLOSED	-1
86  * Cache files cache definition
89 	struct fscache_cache		*cache;		/* Cache cookie */  member
90 	struct vfsmount			*mnt;		/* mountpoint holding the cache */
97 	const struct cred		*cache_cred;	/* security override for accessing cache */
110 	unsigned			bsize;		/* cache's block size */
119 #define CACHEFILES_READY		0	/* T if cache prepared */
120 #define CACHEFILES_DEAD			1	/* T if cache dead */
123 #define CACHEFILES_ONDEMAND_MODE	4	/* T if in on-demand read mode */
124 	char				*rootdirname;	/* name of cache root directory */
125 	char				*tag;		/* cache binding tag */
127 	struct xarray			reqs;		/* xarray of pending on-demand requests */
136 static inline bool cachefiles_in_ondemand_mode(struct cachefiles_cache *cache)  in cachefiles_in_ondemand_mode()  argument
139 		test_bit(CACHEFILES_ONDEMAND_MODE, &cache->flags);  in cachefiles_in_ondemand_mode()
157 	return cres->cache_priv2;  in cachefiles_cres_file()
163 	return fscache_cres_cookie(cres)->cache_priv;  in cachefiles_cres_object()
169 static inline void cachefiles_state_changed(struct cachefiles_cache *cache)  in cachefiles_state_changed()  argument
171 	set_bit(CACHEFILES_STATE_CHANGED, &cache->flags);  in cachefiles_state_changed()
172 	wake_up_all(&cache->daemon_pollwq);  in cachefiles_state_changed()
176  * cache.c
178 extern int cachefiles_add_cache(struct cachefiles_cache *cache);
179 extern void cachefiles_withdraw_cache(struct cachefiles_cache *cache);
186 extern int cachefiles_has_space(struct cachefiles_cache *cache,
194 extern void cachefiles_flush_reqs(struct cachefiles_cache *cache);
195 extern void cachefiles_get_unbind_pincount(struct cachefiles_cache *cache);
196 extern void cachefiles_put_unbind_pincount(struct cachefiles_cache *cache);
222 	return cachefiles_error_injection_state & 2 ? -EIO : 0;  in cachefiles_inject_read_error()
227 	return cachefiles_error_injection_state & 2 ? -EIO :  in cachefiles_inject_write_error()
228 		cachefiles_error_injection_state & 1 ? -ENOSPC :  in cachefiles_inject_write_error()
234 	return cachefiles_error_injection_state & 2 ? -EIO : 0;  in cachefiles_inject_remove_error()
279 extern int cachefiles_bury_object(struct cachefiles_cache *cache,
287 extern struct dentry *cachefiles_get_directory(struct cachefiles_cache *cache,
293 extern int cachefiles_cull(struct cachefiles_cache *cache, struct dentry *dir,
296 extern int cachefiles_check_in_use(struct cachefiles_cache *cache,
299 extern bool cachefiles_commit_tmpfile(struct cachefiles_cache *cache,
306 extern ssize_t cachefiles_ondemand_daemon_read(struct cachefiles_cache *cache,
309 extern int cachefiles_ondemand_copen(struct cachefiles_cache *cache,
312 extern int cachefiles_ondemand_restore(struct cachefiles_cache *cache,
329 	return object->ondemand->state == CACHEFILES_ONDEMAND_OBJSTATE_##_STATE; \
335 	object->ondemand->state = CACHEFILES_ONDEMAND_OBJSTATE_##_STATE; \
345 	return cachefiles_ondemand_object_is_reopening(req->object) &&  in cachefiles_ondemand_is_reopening_read()
346 			req->msg.opcode == CACHEFILES_OP_READ;  in cachefiles_ondemand_is_reopening_read()
350 static inline ssize_t cachefiles_ondemand_daemon_read(struct cachefiles_cache *cache,  in cachefiles_ondemand_daemon_read()  argument
353 	return -EOPNOTSUPP;  in cachefiles_ondemand_daemon_read()
368 	return -EOPNOTSUPP;  in cachefiles_ondemand_read()
389 extern int cachefiles_get_security_ID(struct cachefiles_cache *cache);
390 extern int cachefiles_determine_cache_security(struct cachefiles_cache *cache,
394 static inline void cachefiles_begin_secure(struct cachefiles_cache *cache,  in cachefiles_begin_secure()  argument
397 	*_saved_cred = override_creds(cache->cache_cred);  in cachefiles_begin_secure()
400 static inline void cachefiles_end_secure(struct cachefiles_cache *cache,  in cachefiles_end_secure()  argument
419 extern int cachefiles_remove_object_xattr(struct cachefiles_cache *cache,
432 	fscache_io_error((___cache)->cache);		\
433 	set_bit(CACHEFILES_DEAD, &(___cache)->flags);	\
442 	___cache = (object)->volume->cache;				\
444 			    (object)->debug_id);			\
457 	printk(KERN_DEBUG "[%-6.6s] "FMT"\n", current->comm, ##__VA_ARGS__)
505 #define ASSERTCMP(X, OP, Y)						\  argument
507 	if (unlikely(!((X) OP (Y)))) {					\
510 		pr_err("%lx " #OP " %lx is false\n",			\
525 #define ASSERTIFCMP(C, X, OP, Y)					\  argument
527 	if (unlikely((C) && !((X) OP (Y)))) {				\
530 		pr_err("%lx " #OP " %lx is false\n",			\
539 #define ASSERTCMP(X, OP, Y)		do {} while (0)  argument
541 #define ASSERTIFCMP(C, X, OP, Y)	do {} while (0)  argument