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Setattr should not retry on EBUSY, we could get EBUSY back because

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a disklabel modification tries to change an open device, and no
counter-examples exists.

Be less facist about when we can do Setattr, the openmodes of devices
are so loosely managed that the "exclusive" count is almost useless.

Sponsored by:   DARPA & NAI Labs.
This commit is contained in:
Poul-Henning Kamp 2002-09-27 21:12:47 +00:00
parent 9169e8004d
commit d4c4a6f165
1 changed files with 15 additions and 14 deletions
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29
sys/geom/geom_io.c
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@ -172,19 +172,15 @@ g_io_setattr(const char *attr, struct g_consumer *cp, int len, void *ptr)
int error;
g_trace(G_T_BIO, "bio_setattr(%s)", attr);
do {
bp = g_new_bio();
bp->bio_cmd = BIO_SETATTR;
bp->bio_done = NULL;
bp->bio_attribute = attr;
bp->bio_length = len;
bp->bio_data = ptr;
g_io_request(bp, cp);
error = biowait(bp, "gsetattr");
g_destroy_bio(bp);
if (error == EBUSY)
tsleep(&error, 0, "setattr_busy", hz);
} while(error == EBUSY);
bp = g_new_bio();
bp->bio_cmd = BIO_SETATTR;
bp->bio_done = NULL;
bp->bio_attribute = attr;
bp->bio_length = len;
bp->bio_data = ptr;
g_io_request(bp, cp);
error = biowait(bp, "gsetattr");
g_destroy_bio(bp);
return (error);
}
@ -260,8 +256,13 @@ g_io_request(struct bio *bp, struct g_consumer *cp)
return (g_io_fail(bp, EPERM));
break;
case BIO_SETATTR:
if ((cp->acw == 0) || (cp->ace == 0))
/* XXX: Should ideally check for (cp->ace == 0) */
if ((cp->acw == 0)) {
printf("setattr on %s mode (%d,%d,%d)\n",
cp->provider->name,
cp->acr, cp->acw, cp->ace);
return (g_io_fail(bp, EPERM));
}
break;
default:
return (g_io_fail(bp, EPERM));