185 lines
2.8 KiB
HTML
185 lines
2.8 KiB
HTML
<HTML
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><HEAD
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><TITLE
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>resid</TITLE
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><META
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NAME="GENERATOR"
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CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+
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"><LINK
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REL="HOME"
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TITLE="The Linux SCSI Generic (sg) HOWTO"
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HREF="index.html"><LINK
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REL="UP"
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TITLE="The sg_io_hdr_t structure in detail"
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HREF="sg_io_hdr_t.html"><LINK
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REL="PREVIOUS"
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TITLE="driver_status"
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HREF="x322.html"><LINK
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REL="NEXT"
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TITLE="duration"
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HREF="x361.html"></HEAD
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><BODY
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CLASS="SECT1"
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BGCOLOR="#FFFFFF"
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TEXT="#000000"
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LINK="#0000FF"
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VLINK="#840084"
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ALINK="#0000FF"
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><DIV
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CLASS="NAVHEADER"
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><TABLE
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SUMMARY="Header navigation table"
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WIDTH="100%"
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BORDER="0"
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CELLSPACING="0"
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><TR
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><TH
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COLSPAN="3"
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ALIGN="center"
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>The Linux SCSI Generic (sg) HOWTO</TH
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></TR
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><TR
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><TD
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WIDTH="10%"
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ALIGN="left"
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VALIGN="bottom"
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><A
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HREF="x322.html"
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ACCESSKEY="P"
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>Prev</A
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></TD
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><TD
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WIDTH="80%"
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ALIGN="center"
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VALIGN="bottom"
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>Chapter 6. The sg_io_hdr_t structure in detail</TD
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><TD
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WIDTH="10%"
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ALIGN="right"
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VALIGN="bottom"
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HREF="x361.html"
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>Next</A
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></TD
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></TR
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></TABLE
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><HR
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ALIGN="LEFT"
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WIDTH="100%"></DIV
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><DIV
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CLASS="SECT1"
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><H1
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CLASS="SECT1"
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><A
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NAME="AEN356">6.20. resid</H1
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><P
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>This is the residual count from the data transfer. It is 'dxfer_len'
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less the number of bytes actually transferred. In practice it only
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reports underruns (i.e. positive number) as data overruns should
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never happen. This value will be zero if there was no underrun or
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the SCSI adapter doesn't support this feature.
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<A
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NAME="AEN359"
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HREF="#FTN.AEN359"
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>[1]</A
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>
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The type of resid is int .</P
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></DIV
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><H3
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CLASS="FOOTNOTES"
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>Notes</H3
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><TABLE
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BORDER="0"
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CLASS="FOOTNOTES"
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WIDTH="100%"
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><TR
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><TD
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ALIGN="LEFT"
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VALIGN="TOP"
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WIDTH="5%"
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><A
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NAME="FTN.AEN359"
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HREF="x356.html#AEN359"
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>[1]</A
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></TD
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><TD
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ALIGN="LEFT"
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VALIGN="TOP"
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WIDTH="95%"
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><P
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>Unfortunately some adapters drivers report an incorrect number for 'resid'.
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This is due to some "fuzziness" in the internal interface definitions within
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the Linux scsi subsystem concerning the _exact_ number of bytes to be
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transferred. Therefore only applications tied to a specific adapter that
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is known to give the correct figure should use this feature. Hopefully
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this will be cleared up in the near future.</P
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></TD
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></TR
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></TABLE
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><DIV
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CLASS="NAVFOOTER"
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><HR
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ALIGN="LEFT"
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WIDTH="100%"><TABLE
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SUMMARY="Footer navigation table"
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><TR
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><TD
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
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HREF="x322.html"
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ACCESSKEY="P"
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>Prev</A
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WIDTH="34%"
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ALIGN="center"
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VALIGN="top"
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><A
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HREF="index.html"
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ACCESSKEY="H"
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>Home</A
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VALIGN="top"
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HREF="x361.html"
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ACCESSKEY="N"
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>Next</A
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></TD
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></TR
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><TR
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><TD
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
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>driver_status</TD
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><TD
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WIDTH="34%"
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ALIGN="center"
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VALIGN="top"
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><A
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HREF="sg_io_hdr_t.html"
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>Up</A
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></TD
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><TD
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WIDTH="33%"
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ALIGN="right"
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VALIGN="top"
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>duration</TD
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></TR
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></TABLE
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></DIV
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></BODY
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></HTML
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> |