nvmet: add error-log definitions

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This patch adds necessary fields in the target data structures to
support error log page. For a target controller, we add a new error log
field to maintain the error log, at any given point we maintain error
entries equal to NVMET_ERROR_LOG_SLOTS for each controller. In the
following patch, we also update the error log page entry in the I/O
completion path so we introduce a spinlock for synchronization of the
log.

For nvmet_req, we add a new field error_loc to hold the location of
the error in the command when the actual error occurs for each request
and a starting LBA if applicable.

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>

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Chaitanya Kulkarni 2018-12-12 15:11:39 -08:00 • committed by Christoph Hellwig

parent b34de7cee0

commit e4a976254e

2 changed files with 11 additions and 0 deletions

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5

drivers/nvme/target/core.c

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6

drivers/nvme/target/nvmet.h

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