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Don't short-circuit zero-length requests of they are BIO_[SG]ETATTR.

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This commit is contained in:
Poul-Henning Kamp 2003-02-11 13:13:10 +00:00
parent a0ca480ce6
commit 392d56b4bd
1 changed files with 18 additions and 10 deletions
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28
sys/geom/geom_io.c
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@ -393,16 +393,24 @@ g_io_schedule_down(struct thread *tp __unused)
g_io_deliver(bp, error);
continue;
}
/* Truncate requests to the end of providers media. */
excess = bp->bio_offset + bp->bio_length;
if (excess > bp->bio_to->mediasize) {
excess -= bp->bio_to->mediasize;
bp->bio_length -= excess;
}
/* Deliver zero length transfers right here. */
if (bp->bio_length == 0) {
g_io_deliver(bp, 0);
continue;
switch (bp->bio_cmd) {
case BIO_READ:
case BIO_WRITE:
case BIO_DELETE:
/* Truncate requests to the end of providers media. */
excess = bp->bio_offset + bp->bio_length;
if (excess > bp->bio_to->mediasize) {
excess -= bp->bio_to->mediasize;
bp->bio_length -= excess;
}
/* Deliver zero length transfers right here. */
if (bp->bio_length == 0) {
g_io_deliver(bp, 0);
continue;
}
break;
default:
break;
}
bp->bio_to->geom->start(bp);
if (pace) {