motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-03 07:43:54 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

file-posix: add tracking of the zone write pointers

Browse source 
Since Linux doesn't have a user API to issue zone append operations to
zoned devices from user space, the file-posix driver is modified to add
zone append emulation using regular writes. To do this, the file-posix
driver tracks the wp location of all zones of the device. It uses an
array of uint64_t. The most significant bit of each wp location indicates
if the zone type is conventional zones.

The zones wp can be changed due to the following operations issued:
- zone reset: change the wp to the start offset of that zone
- zone finish: change to the end location of that zone
- write to a zone
- zone append

Signed-off-by: Sam Li <faithilikerun@gmail.com>
Message-id: 20230508051510.177850-2-faithilikerun@gmail.com
[Fix errno propagation from handle_aiocb_zone_mgmt()
--Stefan]
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Sam Li 2023-05-08 13:15:07 +08:00 • committed by Stefan Hajnoczi
parent 90fd974668
commit a3c41f06d5
3 changed files with 193 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

14
include/block/block-common.h
View file

@ -118,6 +118,14 @@ typedef struct BlockZoneDescriptor {
BlockZoneState state;
} BlockZoneDescriptor;
/*
* Track write pointers of a zone in bytes.
*/
typedef struct BlockZoneWps {
CoMutex colock;
uint64_t wp[];
} BlockZoneWps;
typedef struct BlockDriverInfo {
/* in bytes, 0 if irrelevant */
int cluster_size;
@ -240,6 +248,12 @@ typedef enum {
#define BDRV_SECTOR_BITS 9
#define BDRV_SECTOR_SIZE (1ULL << BDRV_SECTOR_BITS)
/*
* Get the first most significant bit of wp. If it is zero, then
* the zone type is SWR.
*/
#define BDRV_ZT_IS_CONV(wp) (wp & (1ULL << 63))
#define BDRV_REQUEST_MAX_SECTORS MIN_CONST(SIZE_MAX >> BDRV_SECTOR_BITS, \
INT_MAX >> BDRV_SECTOR_BITS)
#define BDRV_REQUEST_MAX_BYTES (BDRV_REQUEST_MAX_SECTORS << BDRV_SECTOR_BITS)

5
include/block/block_int-common.h
View file

@ -891,6 +891,8 @@ typedef struct BlockLimits {
/* maximum number of active zones */
uint32_t max_active_zones;
uint32_t write_granularity;
} BlockLimits;
typedef struct BdrvOpBlocker BdrvOpBlocker;
@ -1252,6 +1254,9 @@ struct BlockDriverState {
CoMutex bsc_modify_lock;
/* Always non-NULL, but must only be dereferenced under an RCU read guard */
BdrvBlockStatusCache *block_status_cache;
/* array of write pointers' location of each zone in the zoned device. */
BlockZoneWps *wps;
};
struct BlockBackendRootState {