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nvme: Limit blkshift to 12 (for 4 kB blocks)

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Linux does not support blocks greater than 4 kB anyway, so we might as
well limit blkshift to 12 and thus save us from some potential trouble.

Reported-by: Peter Maydell <peter.maydell@linaro.org>
Suggested-by: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-id: 20190730114812.10493-1-mreitz@redhat.com
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Coverity: CID 1403771
Signed-off-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Max Reitz 2019-07-30 13:48:12 +02:00
parent 6e9a6cbe7d
commit 1120407bdf
1 changed files with 11 additions and 11 deletions
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22
block/nvme.c
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@ -105,7 +105,7 @@ typedef struct {
uint64_t nsze; /* Namespace size reported by identify command */
int nsid; /* The namespace id to read/write data. */
size_t blkshift;
int blkshift;
uint64_t max_transfer;
bool plugged;
@ -420,7 +420,7 @@ static void nvme_identify(BlockDriverState *bs, int namespace, Error **errp)
NvmeIdNs *idns;
NvmeLBAF *lbaf;
uint8_t *resp;
int r, hwsect_size;
int r;
uint64_t iova;
NvmeCmd cmd = {
.opcode = NVME_ADM_CMD_IDENTIFY,
@ -474,11 +474,11 @@ static void nvme_identify(BlockDriverState *bs, int namespace, Error **errp)
goto out;
}
hwsect_size = 1 << lbaf->ds;
if (hwsect_size < BDRV_SECTOR_SIZE || hwsect_size > s->page_size) {
error_setg(errp, "Namespace has unsupported block size (%d)",
hwsect_size);
if (lbaf->ds < BDRV_SECTOR_BITS || lbaf->ds > 12 ||
(1 << lbaf->ds) > s->page_size)
{
error_setg(errp, "Namespace has unsupported block size (2^%d)",
lbaf->ds);
goto out;
}
@ -804,16 +804,16 @@ static int64_t nvme_getlength(BlockDriverState *bs)
return s->nsze << s->blkshift;
}
static int64_t nvme_get_blocksize(BlockDriverState *bs)
static uint32_t nvme_get_blocksize(BlockDriverState *bs)
{
BDRVNVMeState *s = bs->opaque;
assert(s->blkshift >= BDRV_SECTOR_BITS);
return 1 << s->blkshift;
assert(s->blkshift >= BDRV_SECTOR_BITS && s->blkshift <= 12);
return UINT32_C(1) << s->blkshift;
}
static int nvme_probe_blocksizes(BlockDriverState *bs, BlockSizes *bsz)
{
int64_t blocksize = nvme_get_blocksize(bs);
uint32_t blocksize = nvme_get_blocksize(bs);
bsz->phys = blocksize;
bsz->log = blocksize;
return 0;