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| author | Nicholas Bellinger | 2015-02-08 12:06:17 +0100 |
|---|---|---|
| committer | Nicholas Bellinger | 2015-04-08 08:26:43 +0200 |
| commit | 5132d1e655dc4befcc075ef32a261eb9733bb04c (patch) | |
| tree | e3c4c4b661427e64eb901db72747d7ad66132f52 /drivers/target/target_core_sbc.c | |
| parent | target: Move cmd->prot_op check into target_write_prot_action (diff) | |
| download | kernel-qcow2-linux-5132d1e655dc4befcc075ef32a261eb9733bb04c.tar.gz kernel-qcow2-linux-5132d1e655dc4befcc075ef32a261eb9733bb04c.tar.xz kernel-qcow2-linux-5132d1e655dc4befcc075ef32a261eb9733bb04c.zip | |
target: Add internal WRITE_STRIP support
This patch adds WRITE_STRIP support in target_write_prot_action() that
invokes sbc_dif_verify_write() for checking T10-PI metadata before
submitting the I/O to a backend driver.
Upon verify failure, the specific sense code is propigated up the
failure path up to transport_generic_request_failure().
Also, update sbc_dif_verify_write() to only perform the subsequent
protection metadata copy when a valid *sg is passed.
(Use ilog2 instead of division and unlikely for pi_err - Sagi)
Reviewed-by: Martin Petersen <martin.petersen@oracle.com>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers/target/target_core_sbc.c')
| -rw-r--r-- | drivers/target/target_core_sbc.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/target/target_core_sbc.c b/drivers/target/target_core_sbc.c index 67bc1886f004..315ff641408b 100644 --- a/drivers/target/target_core_sbc.c +++ b/drivers/target/target_core_sbc.c @@ -1342,6 +1342,9 @@ sbc_dif_verify_write(struct se_cmd *cmd, sector_t start, unsigned int sectors, kunmap_atomic(paddr); kunmap_atomic(daddr); } + if (!sg) + return 0; + sbc_dif_copy_prot(cmd, sectors, false, sg, sg_off); return 0; |