From: Igor Fedotov <ifedotov@suse.com>
Date: Thu, 29 Apr 2021 18:16:44 +0000 (+0300)
Subject: os/bluestore: tolerate zero length for allocators' init_[add/rm]_free()
X-Git-Tag: v15.2.14~61^2
X-Git-Url: http://git.apps.os.sepia.ceph.com/?a=commitdiff_plain;h=dd59b241288e66bddea28132b8bfb239b160e1a1;p=ceph.git

os/bluestore: tolerate zero length for allocators' init_[add/rm]_free()

Signed-off-by: Igor Fedotov <ifedotov@suse.com>
(cherry picked from commit 6548e5d991810e89fc1ac14eb4fcf1a37a2b129f)
---

diff --git a/src/os/bluestore/AvlAllocator.cc b/src/os/bluestore/AvlAllocator.cc
index 0ac70baa80c3a..42b6ea028752f 100644
--- a/src/os/bluestore/AvlAllocator.cc
+++ b/src/os/bluestore/AvlAllocator.cc
@@ -405,6 +405,8 @@ void AvlAllocator::dump(std::function<void(uint64_t offset, uint64_t length)> no
 
 void AvlAllocator::init_add_free(uint64_t offset, uint64_t length)
 {
+  if (!length)
+    return;
   std::lock_guard l(lock);
   ldout(cct, 10) << __func__ << std::hex
                  << " offset 0x" << offset
@@ -415,6 +417,8 @@ void AvlAllocator::init_add_free(uint64_t offset, uint64_t length)
 
 void AvlAllocator::init_rm_free(uint64_t offset, uint64_t length)
 {
+  if (!length)
+    return;
   std::lock_guard l(lock);
   ldout(cct, 10) << __func__ << std::hex
                  << " offset 0x" << offset
diff --git a/src/os/bluestore/HybridAllocator.cc b/src/os/bluestore/HybridAllocator.cc
index 6caf5c6dd8924..3a2da67379b59 100644
--- a/src/os/bluestore/HybridAllocator.cc
+++ b/src/os/bluestore/HybridAllocator.cc
@@ -155,6 +155,8 @@ void HybridAllocator::dump(std::function<void(uint64_t offset, uint64_t length)>
 
 void HybridAllocator::init_rm_free(uint64_t offset, uint64_t length)
 {
+  if (!length)
+    return;
   std::lock_guard l(lock);
   ldout(cct, 10) << __func__ << std::hex
                  << " offset 0x" << offset
diff --git a/src/os/bluestore/StupidAllocator.cc b/src/os/bluestore/StupidAllocator.cc
index 2660657d9e934..ca6121ac38c58 100644
--- a/src/os/bluestore/StupidAllocator.cc
+++ b/src/os/bluestore/StupidAllocator.cc
@@ -307,6 +307,8 @@ void StupidAllocator::dump(std::function<void(uint64_t offset, uint64_t length)>
 
 void StupidAllocator::init_add_free(uint64_t offset, uint64_t length)
 {
+  if (!length)
+    return;
   std::lock_guard l(lock);
   ldout(cct, 10) << __func__ << " 0x" << std::hex << offset << "~" << length
 		 << std::dec << dendl;
@@ -316,6 +318,8 @@ void StupidAllocator::init_add_free(uint64_t offset, uint64_t length)
 
 void StupidAllocator::init_rm_free(uint64_t offset, uint64_t length)
 {
+  if (!length)
+    return;
   std::lock_guard l(lock);
   ldout(cct, 10) << __func__ << " 0x" << std::hex << offset << "~" << length
 	   	 << std::dec << dendl;
diff --git a/src/test/objectstore/Allocator_test.cc b/src/test/objectstore/Allocator_test.cc
index f6f0c38bec20a..71b74d5abe39c 100644
--- a/src/test/objectstore/Allocator_test.cc
+++ b/src/test/objectstore/Allocator_test.cc
@@ -47,6 +47,23 @@ TEST_P(AllocTest, test_alloc_init)
   ASSERT_EQ(alloc->get_free(), (uint64_t) 0);
 }
 
+TEST_P(AllocTest, test_init_add_free)
+{
+  int64_t block_size = 1024;
+  int64_t capacity = 4 * 1024 * block_size;
+
+  {
+    init_alloc(capacity, block_size);
+
+    auto free = alloc->get_free();
+    alloc->init_add_free(block_size, 0);
+    ASSERT_EQ(free, alloc->get_free());
+
+    alloc->init_rm_free(block_size, 0);
+    ASSERT_EQ(free, alloc->get_free());
+  }
+}
+
 TEST_P(AllocTest, test_alloc_min_alloc)
 {
   int64_t block_size = 1024;