block_cache: enable prefetching

* Allocate blocks and add them to the hash table so they are available for a future block_cache_get call. * Make use of prefetching in FAT driver. * A client filesystem may request to prefetch a block run that contains some blocks that are already cached. The request will be truncated at the first such block in the run. * Fixes #19186. Change-Id: I8d2e3cff15e5b46569438e0dc085e2b391aa57a5 Reviewed-on: https://review.haiku-os.org/c/haiku/+/8525 Reviewed-by: waddlesplash <[email protected]>
2024-11-16 18:26:21 +00:00
parent e6bf67457c
commit 9bb1816c14
7 changed files with 314 additions and 0 deletions
@@ -78,6 +78,7 @@ extern const void *block_cache_get(void *cache, off_t blockNumber);
 extern status_t block_cache_set_dirty(void *cache, off_t blockNumber,
 					bool isDirty, int32 transaction);
 extern void block_cache_put(void *cache, off_t blockNumber);
+extern status_t block_cache_prefetch(void* cache, off_t blockNumber, size_t* _numBlocks);

 /* file cache */
 extern void *file_cache_create(dev_t mountID, ino_t vnodeID, off_t size);