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| author | Lee Duncan <lduncan@suse.com> | 2018-05-15 18:25:24 -0700 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2018-05-18 12:22:48 -0400 |
| commit | bd81372065fa467e262150c70be885f47f9535df (patch) | |
| tree | dfa782e8a1a792f76ca14dffb4b224c6174abebd /include/target | |
| parent | 51b910c3c70986a5a0a84eea11cb8e904e37ba8b (diff) | |
| download | op-kernel-dev-bd81372065fa467e262150c70be885f47f9535df.zip op-kernel-dev-bd81372065fa467e262150c70be885f47f9535df.tar.gz | |
scsi: target: transport should handle st FM/EOM/ILI reads
When a tape drive is exported via LIO using the pscsi module, a read
that requests more bytes per block than the tape can supply returns an
empty buffer. This is because the pscsi pass-through target module sees
the "ILI" illegal length bit set and thinks there is no reason to return
the data.
This is a long-standing transport issue, since it assumes that no data
need be returned under a check condition, which isn't always the case
for tape.
Add in a check for tape reads with the ILI, EOM, or FM bits set, with a
sense code of NO_SENSE, treating such cases as if the read
succeeded. The layered tape driver then "does the right thing" when it
gets such a response.
Signed-off-by: Bodo Stroesser <bstroesser@ts.fujitsu.com>
Signed-off-by: Lee Duncan <lduncan@suse.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'include/target')
| -rw-r--r-- | include/target/target_core_base.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h index 9f9f590..922a39f 100644 --- a/include/target/target_core_base.h +++ b/include/target/target_core_base.h @@ -143,6 +143,7 @@ enum se_cmd_flags_table { SCF_ACK_KREF = 0x00400000, SCF_USE_CPUID = 0x00800000, SCF_TASK_ATTR_SET = 0x01000000, + SCF_TREAT_READ_AS_NORMAL = 0x02000000, }; /* |
