ref: d5061ab6135497e2091d94c34ce194c4e83b6b27
parent: 46c3c339d15e69ac633e122b95861151d6af1c62
author: ngkaho1234 <ngkaho1234@gmail.com>
date: Sat Dec 26 06:09:55 EST 2015
ext4_balloc: invalidate buffers which have the blocks freed.
--- a/lwext4/ext4_balloc.c
+++ b/lwext4/ext4_balloc.c
@@ -211,6 +211,7 @@
bg_ref.dirty = true;
+ ext4_bcache_invalidate_lba(fs->bdev->bc, baddr, 1);
/* Release block group reference */
return ext4_fs_put_block_group_ref(&bg_ref);
}
@@ -317,6 +318,7 @@
bg_first++;
}
+ ext4_bcache_invalidate_lba(fs->bdev->bc, first, count);
/*All blocks should be released*/
ext4_assert(count == 0);
return rc;
--- a/lwext4/ext4_bcache.c
+++ b/lwext4/ext4_bcache.c
@@ -176,6 +176,21 @@
bc->ref_blocks--;
}
+void ext4_bcache_invalidate_lba(struct ext4_bcache *bc,
+ uint64_t from,
+ uint32_t cnt)
+{+ uint64_t end = from + cnt - 1;
+ struct ext4_buf *tmp = ext4_buf_lookup(bc, from), *buf;
+ RB_FOREACH_FROM(buf, ext4_buf_lba, tmp) {+ if (buf->lba > end)
+ break;
+
+ /* Clear both dirty and up-to-date flags. */
+ ext4_bcache_clear_dirty(buf);
+ }
+}
+
struct ext4_buf *
ext4_bcache_find_get(struct ext4_bcache *bc, struct ext4_block *b,
uint64_t lba)
--- a/lwext4/ext4_bcache.h
+++ b/lwext4/ext4_bcache.h
@@ -238,6 +238,15 @@
* @param buf buffer*/
void ext4_bcache_drop_buf(struct ext4_bcache *bc, struct ext4_buf *buf);
+/**@brief Invalidate a range of buffers.
+ * @param bc block cache descriptor
+ * @param from starting lba
+ * @param cnt block counts
+ * @param buf buffer*/
+void ext4_bcache_invalidate_lba(struct ext4_bcache *bc,
+ uint64_t from,
+ uint32_t cnt);
+
/**@brief Find existing buffer from block cache memory.
* Unreferenced block allocation is based on LRU
* (Last Recently Used) algorithm.