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devmnt: add debug print for convS2M failing, suspecting this causing zero length writes

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This commit is contained in:
cinap_lenrek 2013-06-16 06:16:43 +02:00
parent 389f457505
commit d84aeddee7
1 changed files with 6 additions and 2 deletions
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8
sys/src/9/port/devmnt.c
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@ -794,8 +794,12 @@ mountio(Mnt *m, Mntrpc *r)
if(m->msize == 0)
panic("msize");
n = convS2M(&r->request, r->rpc, m->msize);
if(n < 0)
panic("bad message type in mountio");
if(n <= 0){
print("mountio: proc %s %lud: convS2M returned %d for tag %d fid %d T%d\n",
up->text, up->pid, n, r->request.tag, r->request.fid, r->request.type);
error(Emountrpc);
}
if(devtab[m->c->type]->write(m->c, r->rpc, n, 0) != n)
error(Emountrpc);
r->stime = fastticks(nil);