Add get_freeable_nblks and get_defrag_nblks api to Vchunk

conanfile.py

@@ -5,7 +5,7 @@
 
 class HomestoreConan(ConanFile):
     name = "homestore"
-    version = "4.5.8"
+    version = "4.5.9"
 
     homepage = "https://github.com/eBay/Homestore"
     description = "HomeStore Storage Engine"

src/include/homestore/vchunk.h

@@ -30,6 +30,8 @@ class VChunk {
     void set_user_private(const sisl::blob& data);
     const uint8_t* get_user_private() const;
     blk_num_t available_blks() const;
+    blk_num_t get_freeable_nblks() const;
+    blk_num_t get_defrag_nblks() const;
     uint32_t get_pdev_id() const;
     uint16_t get_chunk_id() const;
     cshared< Chunk > get_internal_chunk() const;

src/lib/blkalloc/blk_allocator.h

@@ -186,6 +186,8 @@ class BlkAllocator {
     virtual BlkAllocStatus alloc(blk_count_t nblks, blk_alloc_hints const& hints, BlkId& out_blkid) = 0;
     virtual void free(BlkId const& id) = 0;
     virtual blk_num_t available_blks() const = 0;
+    virtual blk_num_t get_freeable_nblks() const = 0;
+    virtual blk_num_t get_defrag_nblks() const = 0;
     virtual blk_num_t get_used_blks() const = 0;
     virtual bool is_blk_alloced(BlkId const& b, bool use_lock = false) const = 0;
     virtual std::string to_string() const = 0;
@@ -319,6 +321,8 @@ class FixedBlkAllocator : public BlkAllocator {
     void inited() override;
 
     blk_num_t available_blks() const override;
+    blk_num_t get_freeable_nblks() const override;
+    blk_num_t get_defrag_nblks() const override;
     blk_num_t get_used_blks() const override;
     bool is_blk_alloced(BlkId const& in_bid, bool use_lock = false) const override;
     std::string to_string() const override;

src/lib/blkalloc/fixed_blk_allocator.cpp

@@ -85,6 +85,17 @@ void FixedBlkAllocator::free(BlkId const& b) {
 }
 
 blk_num_t FixedBlkAllocator::available_blks() const { return m_blk_q.sizeGuess(); }
+
+blk_num_t FixedBlkAllocator::get_freeable_nblks() const {
+    // TODO: implement this
+    return 0;
+}
+
+blk_num_t FixedBlkAllocator::get_defrag_nblks() const {
+    // TODO: implement this
+    return 0;
+}
+
 blk_num_t FixedBlkAllocator::get_used_blks() const { return get_total_blks() - available_blks(); }
 
 std::string FixedBlkAllocator::to_string() const {

src/lib/blkalloc/varsize_blk_allocator.cpp

@@ -731,6 +731,17 @@ bool VarsizeBlkAllocator::is_blk_alloced(BlkId const& bid, bool use_lock) const
 }
 
 blk_num_t VarsizeBlkAllocator::available_blks() const { return get_total_blks() - get_used_blks(); }
+
+blk_num_t VarsizeBlkAllocator::get_freeable_nblks() const {
+    // TODO: implement this
+    return 0;
+}
+
+blk_num_t VarsizeBlkAllocator::get_defrag_nblks() const {
+    // TODO: implement this
+    return 0;
+}
+
 blk_num_t VarsizeBlkAllocator::get_used_blks() const { return get_alloced_blk_count(); }
 
 #ifdef _PRERELEASE

src/lib/blkalloc/varsize_blk_allocator.h

@@ -216,6 +216,8 @@ class VarsizeBlkAllocator : public BlkAllocator {
     void inited() override;
 
     blk_num_t available_blks() const override;
+    blk_num_t get_freeable_nblks() const override;
+    blk_num_t get_defrag_nblks() const override;
     blk_num_t get_used_blks() const override;
     bool is_blk_alloced(BlkId const& in_bid, bool use_lock = false) const override;
     std::string to_string() const override;

src/lib/device/vchunk.cpp

@@ -25,6 +25,10 @@ const uint8_t* VChunk::get_user_private() const { return m_internal_chunk->user_
 
 blk_num_t VChunk::available_blks() const { return m_internal_chunk->blk_allocator()->available_blks(); }
 
+blk_num_t VChunk::get_freeable_nblks() const { return m_internal_chunk->blk_allocator()->get_freeable_nblks(); }
+
+blk_num_t VChunk::get_defrag_nblks() const { return m_internal_chunk->blk_allocator()->get_defrag_nblks(); }
+
 uint32_t VChunk::get_pdev_id() const { return m_internal_chunk->physical_dev()->pdev_id(); }
 
 uint16_t VChunk::get_chunk_id() const { return m_internal_chunk->chunk_id(); }