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From: "Williams, Dan J" <dan.j.williams@intel.com>
To: "linux-nvdimm@lists.01.org" <linux-nvdimm@lists.01.org>,
	"Verma, Vishal L" <vishal.l.verma@intel.com>
Subject: Re: [ndctl PATCH] libndctl: set errno for routines that don't return an error status
Date: Thu, 4 Oct 2018 23:11:28 +0000	[thread overview]
Message-ID: <34535e5c3a4d0d5f9b31933001127e7f18b77450.camel@intel.com> (raw)
In-Reply-To: <9bd7c5c4d9f389706bfcd13e9cd8b1632afbd6df.camel@intel.com>

On Thu, 2018-10-04 at 16:01 -0700, Verma, Vishal L wrote:
> On Thu, 2018-10-04 at 15:54 -0700, Williams, Dan J wrote:
> > On Thu, 2018-10-04 at 16:34 -0600, Vishal Verma wrote:
> > > For routines that return a UINT_MAX or UL{L}ONG_MAX, there isn't
> > > a
> > > way
> > > to get any information as to what went wrong. Set errno in such
> > > routines
> > > so that the callers can get some additional context about the
> > > error.
> > 
> > Looks ok, but why EOVERFLOW and not ENOMEM for the out of resource
> > conditions?
> I debated between that and also ENOSPC, but nothing seemed like an
> exact fit for a buffer too small.. Mainly not ENOMEM because we
> aren't
> actually trying to allocate memory as a part of this?

That's true, but the effect is the same, couldn't get enough resource
to complete the operation. I would expect EOVERFLOW for trying to store
a 64-bit quantity in a 32-bit field.

Linux-nvdimm mailing list

  reply	other threads:[~2018-10-04 23:11 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-10-04 22:34 Vishal Verma
2018-10-04 22:54 ` Williams, Dan J
2018-10-04 23:01   ` Verma, Vishal L
2018-10-04 23:11     ` Williams, Dan J [this message]
2018-10-04 23:13       ` Verma, Vishal L

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