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| author |   Nicholas Bellinger <nab@linux-iscsi.org> | 2015-02-14 01:56:19 +0000 |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2015-02-14 02:54:40 +0000 |
| commit | d0a91295557666f9e58b79b5177a98229007803b (patch) | |
| tree | 2a4dcb4c633d2d8b7ccd962abbc74f0193e69f61 /drivers/target | |
| parent | target: Add sanity checks for DPO/FUA bit usage (diff) | |
| download | linux-dev-d0a91295557666f9e58b79b5177a98229007803b.tar.xz linux-dev-d0a91295557666f9e58b79b5177a98229007803b.zip | |
target: Fail WRITE_SAME w/ UNMAP=1 when emulate_tpws=0
This patch adds a check within sbc_setup_write_same() to fail a
WRITE_SAME w/ UNMAP=1 op, if the backend device has emulate_tpws
disabled.
Cc: Martin Petersen <martin.petersen@oracle.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers/target')
| -rw-r--r-- | drivers/target/target_core_sbc.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/target/target_core_sbc.c b/drivers/target/target_core_sbc.c index 856e800926b8..0d307c34f08e 100644 --- a/drivers/target/target_core_sbc.c +++ b/drivers/target/target_core_sbc.c @@ -293,6 +293,11 @@ sbc_setup_write_same(struct se_cmd *cmd, unsigned char *flags, struct sbc_ops *o if (!ops->execute_write_same_unmap) return TCM_UNSUPPORTED_SCSI_OPCODE; + if (!dev->dev_attrib.emulate_tpws) { + pr_err("Got WRITE_SAME w/ UNMAP=1, but backend device" + " has emulate_tpws disabled\n"); + return TCM_UNSUPPORTED_SCSI_OPCODE; + } cmd->execute_cmd = ops->execute_write_same_unmap; return 0; } |