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When a bio comes back from below with a zero error code, check that

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it wrote the full length.  The only case where this should be able
to happen is if we try to read/write past the end and the request
is truncated.  We obviously should never try to do that, so this
code should never activate.
This commit is contained in:
Poul-Henning Kamp 2003-04-29 19:37:36 +00:00
parent 1ea349191e
commit ca8f372bbc
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=114249
1 changed files with 4 additions and 0 deletions
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4
sys/geom/bde/g_bde_work.c
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@ -403,6 +403,8 @@ g_bde_write_done(struct bio *bp)
KASSERT(sc != NULL, ("NULL sc"));
KASSERT(sp->owner != NULL, ("NULL sp->owner"));
g_trace(G_T_TOPOLOGY, "g_bde_write_done(%p)", sp);
if (bp->bio_error == 0 && bp->bio_completed != sp->size)
bp->bio_error = EIO;
sp->error = bp->bio_error;
g_destroy_bio(bp);
wp = sp->owner;
@ -479,6 +481,8 @@ g_bde_read_done(struct bio *bp)
g_trace(G_T_TOPOLOGY, "g_bde_read_done(%p)", sp);
sc = bp->bio_caller2;
mtx_lock(&sc->worklist_mutex);
if (bp->bio_error == 0 && bp->bio_completed != sp->siz)
bp->bio_error = EIO;
sp->error = bp->bio_error;
if (sp->error == 0)
sp->state = VALID;