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block/nvme: add support for write zeros

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Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Message-id: 20190913133627.28450-2-mlevitsk@redhat.com
Reviewed-by: John Snow <jsnow@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Maxim Levitsky 2019-09-13 16:36:26 +03:00 • committed by Max Reitz
parent 0e2402452f
commit e0dd95e373
3 changed files with 90 additions and 2 deletions
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19
include/block/nvme.h
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@ -653,12 +653,29 @@ typedef struct NvmeIdNs {
uint8_t mc;
uint8_t dpc;
uint8_t dps;
uint8_t res30[98];
uint8_t nmic;
uint8_t rescap;
uint8_t fpi;
uint8_t dlfeat;
uint8_t res34[94];
NvmeLBAF lbaf[16];
uint8_t res192[192];
uint8_t vs[3712];
} NvmeIdNs;
/*Deallocate Logical Block Features*/
#define NVME_ID_NS_DLFEAT_GUARD_CRC(dlfeat) ((dlfeat) & 0x10)
#define NVME_ID_NS_DLFEAT_WRITE_ZEROES(dlfeat) ((dlfeat) & 0x08)
#define NVME_ID_NS_DLFEAT_READ_BEHAVIOR(dlfeat) ((dlfeat) & 0x7)
#define NVME_ID_NS_DLFEAT_READ_BEHAVIOR_UNDEFINED 0
#define NVME_ID_NS_DLFEAT_READ_BEHAVIOR_ZEROES 1
#define NVME_ID_NS_DLFEAT_READ_BEHAVIOR_ONES 2
#define NVME_ID_NS_NSFEAT_THIN(nsfeat) ((nsfeat & 0x1))
#define NVME_ID_NS_FLBAS_EXTENDED(flbas) ((flbas >> 4) & 0x1)
#define NVME_ID_NS_FLBAS_INDEX(flbas) ((flbas & 0xf))