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Add "external" bitmap support to blockstore

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This commit is contained in:
Vitaliy Filippov
2021-04-10 17:44:12 +03:00
parent 95c29b9dc3
commit 6107a4d07b
10 changed files with 111 additions and 25 deletions
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src/blockstore_impl.h
+6 -3
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@@ -77,7 +77,8 @@
#include "blockstore_journal.h"
// 24 bytes + block bitmap per "clean" entry on disk with fixed metadata tables
// 32 bytes = 24 bytes + block bitmap (4 bytes by default) + external attributes (also bitmap, 4 bytes by default)
// per "clean" entry on disk with fixed metadata tables
// FIXME: maybe add crc32's to metadata
struct __attribute__((__packed__)) clean_disk_entry
{
@@ -93,7 +94,7 @@ struct __attribute__((__packed__)) clean_entry
uint64_t location;
};
// 56 = 24 + 32 bytes per dirty entry in memory (obj_ver_id => dirty_entry)
// 64 = 24 + 40 bytes per dirty entry in memory (obj_ver_id => dirty_entry)
struct __attribute__((__packed__)) dirty_entry
{
uint32_t state;
@@ -102,6 +103,7 @@ struct __attribute__((__packed__)) dirty_entry
uint32_t offset; // data offset within object (stripe)
uint32_t len; // data length
uint64_t journal_sector; // journal sector used for this entry
void* bitmap; // either external bitmap itself when it fits, or a pointer to it when it doesn't
};
// - Sync must be submitted after previous writes/deletes (not before!)
@@ -216,7 +218,7 @@ class blockstore_impl_t
uint32_t block_order;
uint64_t block_count;
uint32_t clean_entry_bitmap_size = 0, clean_entry_size = 0;
uint32_t clean_entry_bitmap_size = 0, clean_entry_size = 0, entry_attr_size = 0;
int meta_fd;
int data_fd;
@@ -250,6 +252,7 @@ class blockstore_impl_t
void open_data();
void open_meta();
void open_journal();
uint8_t* get_clean_entry_bitmap(uint64_t block_loc, int offset);
// Asynchronous init
int initialized;