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authorPaolo Bonzini <pbonzini@redhat.com>2012-09-07 17:30:36 +0200
committerNicholas Bellinger <nab@linux-iscsi.org>2012-09-07 11:14:21 -0700
commit32a8811ff164f882712c17946e58e52444f464a7 (patch)
treef7af9ff41cd4f4e6c61a831c4e14fb1d57ebe05d /include/target
parenttarget: support zero-size allocation lengths in transport_kmap_data_sg (diff)
downloadlinux-dev-32a8811ff164f882712c17946e58e52444f464a7.tar.xz
linux-dev-32a8811ff164f882712c17946e58e52444f464a7.zip
target: support zero allocation length in REQUEST SENSE
Similar to INQUIRY and MODE SENSE, construct the sense data in a buffer and later copy it to the scatterlist. Do not do anything, but still clear a pending unit attention condition, if the allocation length is zero. However, SPC tells us that "If a REQUEST SENSE command is terminated with CHECK CONDITION status [and] the REQUEST SENSE command was received on an I_T nexus with a pending unit attention condition (i.e., before the device server reports CHECK CONDITION status), then the device server shall not clear the pending unit attention condition." Do the transport_kmap_data_sg early to detect this case. It also tells us "Device servers shall not adjust the additional sense length to reflect truncation if the allocation length is less than the sense data available", so do not do that! Note that the err variable is write-only. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'include/target')
-rw-r--r--include/target/target_core_base.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h
index 015cea01ae39..5be89373ceac 100644
--- a/include/target/target_core_base.h
+++ b/include/target/target_core_base.h
@@ -121,6 +121,7 @@
#define SE_INQUIRY_BUF 512
#define SE_MODE_PAGE_BUF 512
+#define SE_SENSE_BUF 96
/* struct se_hba->hba_flags */
enum hba_flags_table {