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Implement blockstore rollback operation

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Rollback operation is required for the primary OSD to kill unstable
object versions in OSD peers so they don't occupy journal space
This commit is contained in:
Vitaliy Filippov
2020-01-24 20:18:14 +03:00
parent 98efdb78bd
commit 2b09710d6f
13 changed files with 291 additions and 55 deletions
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blockstore_journal.h
+13
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@@ -17,6 +17,7 @@
#define JE_BIG_WRITE 0x03
#define JE_STABLE 0x04
#define JE_DELETE 0x05
#define JE_ROLLBACK 0x06
// crc32c comes first to ease calculation and is equal to crc32()
struct __attribute__((__packed__)) journal_entry_start
@@ -71,6 +72,17 @@ struct __attribute__((__packed__)) journal_entry_stable
uint64_t version;
};
struct __attribute__((__packed__)) journal_entry_rollback
{
uint32_t crc32;
uint16_t magic;
uint16_t type;
uint32_t size;
uint32_t crc32_prev;
object_id oid;
uint64_t version;
};
struct __attribute__((__packed__)) journal_entry_del
{
uint32_t crc32;
@@ -98,6 +110,7 @@ struct __attribute__((__packed__)) journal_entry
journal_entry_small_write small_write;
journal_entry_big_write big_write;
journal_entry_stable stable;
journal_entry_rollback rollback;
journal_entry_del del;
};
};