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hw/nvme: reimplement dsm to allow cancellation

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Prior to this patch, a loop was used to issue multiple "fire and forget"
aios for each range in the command. Without a reference to the aiocb
returned from the blk_aio_pdiscard calls, the aios cannot be canceled.

Fix this by processing the ranges one after another.

As a bonus, this fixes how metadata is cleared (i.e. we only zero it out
if the data was succesfully discarded).

Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
This commit is contained in:
Klaus Jensen 2021-06-17 21:06:49 +02:00
parent ff0ac2c8b8
commit d7d1474fd8
2 changed files with 162 additions and 75 deletions
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4
hw/nvme/trace-events
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@ -37,8 +37,8 @@ pci_nvme_verify_mdata_in_cb(uint16_t cid, const char *blkname) "cid %"PRIu16" bl
pci_nvme_verify_cb(uint16_t cid, uint8_t prinfo, uint16_t apptag, uint16_t appmask, uint32_t reftag) "cid %"PRIu16" prinfo 0x%"PRIx8" apptag 0x%"PRIx16" appmask 0x%"PRIx16" reftag 0x%"PRIx32""
pci_nvme_rw_complete_cb(uint16_t cid, const char *blkname) "cid %"PRIu16" blk '%s'"
pci_nvme_block_status(int64_t offset, int64_t bytes, int64_t pnum, int ret, bool zeroed) "offset %"PRId64" bytes %"PRId64" pnum %"PRId64" ret 0x%x zeroed %d"
pci_nvme_dsm(uint16_t cid, uint32_t nsid, uint32_t nr, uint32_t attr) "cid %"PRIu16" nsid %"PRIu32" nr %"PRIu32" attr 0x%"PRIx32""
pci_nvme_dsm_deallocate(uint16_t cid, uint32_t nsid, uint64_t slba, uint32_t nlb) "cid %"PRIu16" nsid %"PRIu32" slba %"PRIu64" nlb %"PRIu32""
pci_nvme_dsm(uint32_t nr, uint32_t attr) "nr %"PRIu32" attr 0x%"PRIx32""
pci_nvme_dsm_deallocate(uint64_t slba, uint32_t nlb) "slba %"PRIu64" nlb %"PRIu32""
pci_nvme_dsm_single_range_limit_exceeded(uint32_t nlb, uint32_t dmrsl) "nlb %"PRIu32" dmrsl %"PRIu32""
pci_nvme_compare(uint16_t cid, uint32_t nsid, uint64_t slba, uint32_t nlb) "cid %"PRIu16" nsid %"PRIu32" slba 0x%"PRIx64" nlb %"PRIu32""
pci_nvme_compare_data_cb(uint16_t cid) "cid %"PRIu16""