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| Kernel Functions for Drivers | strqset(9F) |
| | strqset - change information about a queue or band of the queue |
SYNOPSIS
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#include <sys/stream.h>
int strqset(queue_t *q, qfields_t what, unsigned char pri, intptr_t val); |
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Architecture independent level 1 (DDI/DKI).
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q
- Pointer to the queue.
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what
- Field of the queue structure (or the specified priority band) to return information about. Valid values are one of:
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QHIWAT
- High water mark.
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QLOWAT
- Low water mark.
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QMAXPSZ
- Largest packet accepted.
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QMINPSZ
- Smallest packet accepted.
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pri
- Priority band of interest.
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val
- The value for the field to be changed.
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strqset() gives drivers and modules a way to change information about
a queue or a particular band of a queue without directly accessing STREAMS data structures.
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On success, 0 is returned. EINVAL is returned if an undefined attribute is specified.
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strqset() can be called from user or interrupt context.
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When lowering existing values, set QMINPSZ before setting QMAXPSZ; when raising existing values, set QMAXPSZ before setting QMINPSZ.
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