Lines Matching full:cache
2 /* Bind and unbind a cache from the filesystem backing it
25 * bind a directory as a cache
27 int cachefiles_daemon_bind(struct cachefiles_cache *cache, char *args) in cachefiles_daemon_bind() argument
30 cache->frun_percent, in cachefiles_daemon_bind()
31 cache->fcull_percent, in cachefiles_daemon_bind()
32 cache->fstop_percent, in cachefiles_daemon_bind()
33 cache->brun_percent, in cachefiles_daemon_bind()
34 cache->bcull_percent, in cachefiles_daemon_bind()
35 cache->bstop_percent, in cachefiles_daemon_bind()
39 ASSERT(cache->fstop_percent >= 0 && in cachefiles_daemon_bind()
40 cache->fstop_percent < cache->fcull_percent && in cachefiles_daemon_bind()
41 cache->fcull_percent < cache->frun_percent && in cachefiles_daemon_bind()
42 cache->frun_percent < 100); in cachefiles_daemon_bind()
44 ASSERT(cache->bstop_percent >= 0 && in cachefiles_daemon_bind()
45 cache->bstop_percent < cache->bcull_percent && in cachefiles_daemon_bind()
46 cache->bcull_percent < cache->brun_percent && in cachefiles_daemon_bind()
47 cache->brun_percent < 100); in cachefiles_daemon_bind()
54 if (!cache->rootdirname) { in cachefiles_daemon_bind()
55 pr_err("No cache directory specified\n"); in cachefiles_daemon_bind()
60 if (test_bit(CACHEFILES_READY, &cache->flags)) { in cachefiles_daemon_bind()
61 pr_err("Cache already bound\n"); in cachefiles_daemon_bind()
66 if (!cache->tag) { in cachefiles_daemon_bind()
69 cache->tag = kstrdup("CacheFiles", GFP_KERNEL); in cachefiles_daemon_bind()
70 if (!cache->tag) in cachefiles_daemon_bind()
74 /* add the cache */ in cachefiles_daemon_bind()
75 return cachefiles_daemon_add_cache(cache); in cachefiles_daemon_bind()
79 * add a cache
81 static int cachefiles_daemon_add_cache(struct cachefiles_cache *cache) in cachefiles_daemon_add_cache() argument
93 ret = cachefiles_get_security_ID(cache); in cachefiles_daemon_add_cache()
97 cachefiles_begin_secure(cache, &saved_cred); in cachefiles_daemon_add_cache()
111 /* look up the directory at the root of the cache */ in cachefiles_daemon_add_cache()
112 ret = kern_path(cache->rootdirname, LOOKUP_DIRECTORY, &path); in cachefiles_daemon_add_cache()
116 cache->mnt = path.mnt; in cachefiles_daemon_add_cache()
121 pr_warn("File cache on idmapped mounts not supported"); in cachefiles_daemon_add_cache()
139 /* determine the security of the on-disk cache as this governs in cachefiles_daemon_add_cache()
141 ret = cachefiles_determine_cache_security(cache, root, &saved_cred); in cachefiles_daemon_add_cache()
145 /* get the cache size and blocksize */ in cachefiles_daemon_add_cache()
158 cache->bsize = stats.f_bsize; in cachefiles_daemon_add_cache()
159 cache->bshift = 0; in cachefiles_daemon_add_cache()
161 cache->bshift = PAGE_SHIFT - ilog2(stats.f_bsize); in cachefiles_daemon_add_cache()
164 cache->bsize, cache->bshift); in cachefiles_daemon_add_cache()
172 cache->fstop = stats.f_files * cache->fstop_percent; in cachefiles_daemon_add_cache()
173 cache->fcull = stats.f_files * cache->fcull_percent; in cachefiles_daemon_add_cache()
174 cache->frun = stats.f_files * cache->frun_percent; in cachefiles_daemon_add_cache()
177 (unsigned long long) cache->frun, in cachefiles_daemon_add_cache()
178 (unsigned long long) cache->fcull, in cachefiles_daemon_add_cache()
179 (unsigned long long) cache->fstop); in cachefiles_daemon_add_cache()
181 stats.f_blocks >>= cache->bshift; in cachefiles_daemon_add_cache()
183 cache->bstop = stats.f_blocks * cache->bstop_percent; in cachefiles_daemon_add_cache()
184 cache->bcull = stats.f_blocks * cache->bcull_percent; in cachefiles_daemon_add_cache()
185 cache->brun = stats.f_blocks * cache->brun_percent; in cachefiles_daemon_add_cache()
188 (unsigned long long) cache->brun, in cachefiles_daemon_add_cache()
189 (unsigned long long) cache->bcull, in cachefiles_daemon_add_cache()
190 (unsigned long long) cache->bstop); in cachefiles_daemon_add_cache()
192 /* get the cache directory and check its type */ in cachefiles_daemon_add_cache()
193 cachedir = cachefiles_get_directory(cache, root, "cache"); in cachefiles_daemon_add_cache()
207 graveyard = cachefiles_get_directory(cache, root, "graveyard"); in cachefiles_daemon_add_cache()
213 cache->graveyard = graveyard; in cachefiles_daemon_add_cache()
215 /* publish the cache */ in cachefiles_daemon_add_cache()
216 fscache_init_cache(&cache->cache, in cachefiles_daemon_add_cache()
222 &cache->cache); in cachefiles_daemon_add_cache()
224 ret = fscache_add_cache(&cache->cache, &fsdef->fscache, cache->tag); in cachefiles_daemon_add_cache()
229 set_bit(CACHEFILES_READY, &cache->flags); in cachefiles_daemon_add_cache()
232 pr_info("File cache on %s registered\n", cache->cache.identifier); in cachefiles_daemon_add_cache()
234 /* check how much space the cache has */ in cachefiles_daemon_add_cache()
235 cachefiles_has_space(cache, 0, 0); in cachefiles_daemon_add_cache()
236 cachefiles_end_secure(cache, saved_cred); in cachefiles_daemon_add_cache()
240 dput(cache->graveyard); in cachefiles_daemon_add_cache()
241 cache->graveyard = NULL; in cachefiles_daemon_add_cache()
243 mntput(cache->mnt); in cachefiles_daemon_add_cache()
244 cache->mnt = NULL; in cachefiles_daemon_add_cache()
251 cachefiles_end_secure(cache, saved_cred); in cachefiles_daemon_add_cache()
257 * unbind a cache on fd release
259 void cachefiles_daemon_unbind(struct cachefiles_cache *cache) in cachefiles_daemon_unbind() argument
263 if (test_bit(CACHEFILES_READY, &cache->flags)) { in cachefiles_daemon_unbind()
264 pr_info("File cache on %s unregistering\n", in cachefiles_daemon_unbind()
265 cache->cache.identifier); in cachefiles_daemon_unbind()
267 fscache_withdraw_cache(&cache->cache); in cachefiles_daemon_unbind()
270 dput(cache->graveyard); in cachefiles_daemon_unbind()
271 mntput(cache->mnt); in cachefiles_daemon_unbind()
273 kfree(cache->rootdirname); in cachefiles_daemon_unbind()
274 kfree(cache->secctx); in cachefiles_daemon_unbind()
275 kfree(cache->tag); in cachefiles_daemon_unbind()