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[SCSI] libfc: fix statistics for FCP input/output megabytes

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The statistics for InputMegabytes and OutputMegabytes are
misnamed.  They're accumulating bytes, not megabytes.

The statistic returned via /sys must be in megabytes, however,
which is what the HBA-API wants.  The FCP code needs to accumulate
it in bytes and then divide by 1,000,000 (not 2^20) before it
presented via sysfs.

This affects fcoe.ko only, not fnic.  The fnic driver
correctly by accumulating bytes and then converts to megabytes.

I checked that libhbalinux is using the /sys file directly without
conversion.

BTW, qla2xxx does divide by 2^20, which I'm not fixing here.

Signed-off-by: Joe Eykholt <jeykholt@cisco.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Joe Eykholt
2010-11-30 16:20:18 -08:00
committed by James Bottomley
parent ba9cd5d095
commit 5f0e385fda
3 changed files with 12 additions and 8 deletions
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8
include/scsi/libfc.h
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@@ -221,8 +221,8 @@ struct fc_rport_priv {
* @InputRequests: Number of input requests
* @OutputRequests: Number of output requests
* @ControlRequests: Number of control requests
* @InputMegabytes: Number of received megabytes
* @OutputMegabytes: Number of transmitted megabytes
* @InputBytes: Number of received bytes
* @OutputBytes: Number of transmitted bytes
* @VLinkFailureCount: Number of virtual link failures
* @MissDiscAdvCount: Number of missing FIP discovery advertisement
*/
@@ -241,8 +241,8 @@ struct fcoe_dev_stats {
u64 InputRequests;
u64 OutputRequests;
u64 ControlRequests;
u64 InputMegabytes;
u64 OutputMegabytes;
u64 InputBytes;
u64 OutputBytes;
u64 VLinkFailureCount;
u64 MissDiscAdvCount;
};