The message format of Fig. 3-17 is used for sending request messages to drivers for block devices.
Question:
The message format of Fig. 3-17 is used for sending request messages to drivers for block devices. Could any fields be omitted for character devices? Which ones?
Transcribed Image Text:
Field Type m.m_type int m.DEVICE int m.PROC NR int m.COUNT int m.POSITION long m.ADDRESS char* Requests Meaning Operation requested Minor device to use Process requesting the I/O Byte count or ioctl code Position on device Address within requesting process
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The message format described in Figure 317 is primarily used for sending request messages to drivers ...View the full answer
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Related Book For
Operating Systems Design And Implementation
ISBN: 9780131429383
3rd Edition
Authors: Andrew Tanenbaum, Albert Woodhull
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