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target/user: Report capability of handling out-of-order completions to userspace

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TCMU_MAILBOX_FLAG_CAP_OOOC was introduced, and userspace can check the flag
for out-of-order completion capability support.

Also update the document on how to use the feature.

Signed-off-by: Sheng Yang <sheng@yasker.org>
Reviewed-by: Andy Grover <agrover@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Sheng Yang
2016-02-29 16:02:15 -08:00
committed by Nicholas Bellinger
parent 0241fd39ce
commit 32c76de346
3 changed files with 12 additions and 1 deletions
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include/uapi/linux/target_core_user.h
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@@ -41,6 +41,7 @@
#define TCMU_MAILBOX_VERSION 2
#define ALIGN_SIZE 64 /* Should be enough for most CPUs */
#define TCMU_MAILBOX_FLAG_CAP_OOOC (1 << 0) /* Out-of-order completions */
struct tcmu_mailbox {
__u16 version;