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Message-ID: <11870.1196136773@bebe.enoyolf.org>
Date: Mon, 26 Nov 2007 22:12:53 -0600
From: Doug Maxey <dwm@...yolf.org>
To: Greg KH <greg@...ah.com>
cc: Konrad Rzeszutek <konrad@...nok.org>, linux-kernel@...r.kernel.org,
pjones@...hat.com, konradr@...hat.com, konradr@...ux.vnet.ibm.com,
randy.dunlap@...cle.com, hpa@...or.com, lenb@...nel.org,
mike.anderson@...ibm.com, dwm@...tin.ibm.com
Subject: Re: [PATCH] Add iSCSI IBFT Support (v0.3)
On Mon, 26 Nov 2007 19:31:38 PST, Greg KH wrote:
> On Mon, Nov 26, 2007 at 06:56:42PM -0400, Konrad Rzeszutek wrote:
> > +/*
> > + * Routines for reading of the iBFT data in a human readable fashion.
> > + */
> > +ssize_t ibft_attr_show_initiator(struct ibft_kobject *entry,
> > + struct ibft_attribute *attr,
> > + char *buf)
> > +{
> > + struct ibft_initiator *initiator = attr->initiator;
> > + void *ibft_loc = entry->data->hdr;
> > + char *str = buf;
> > +
> > + if (!initiator)
> > + return 0;
> > +
> > + str += sprintf_ipaddr(str, "isns", initiator->isns_server);
> > + str += sprintf_ipaddr(str, "slp", initiator->slp_server);
> > + str += sprintf_ipaddr(str, "primary_radius_server",
> > + initiator->pri_radius_server);
> > + str += sprintf_ipaddr(str, "secondary_radius_server",
> > + initiator->sec_radius_server);
> > + str += sprintf_string(str, "itname", initiator->initiator_name_len,
> > + (char *)ibft_loc + initiator->initiator_name_off);
> > + str--;
> > +
> > + return str-buf;
> > +}
>
> sysfs files have ONE VALUE PER FILE, not a whole bunch of different
> things in a single file. Please fix this.
The subparameters _are_ actually part of a single value, that value being
associated with the initiator instance.
Konrad is trying to implement a "work-alike" for what open firmware does.
open-iscsi already has the ability to extract the same format
bits from real OFW.
See open-iscsi.git/utils/fwparam_ppc.
>
>
> > +
> > +ssize_t ibft_attr_show_nic(struct ibft_kobject *entry,
> > + struct ibft_attribute *attr,
> > + char *buf)
> > +{
> > + struct ibft_nic *nic = attr->nic;
> > + void *ibft_loc = entry->data->hdr;
> > + char *str = buf;
> > +
> > + if (!nic)
> > + return 0;
> > + /*
> > + * Assume dhcp if any non-zero portions of its address are set.
> > + */
> > + if (memcmp(nic->dhcp, nulls, sizeof(nic->dhcp))) {
> > + str += sprintf_ipaddr(str, "dhcp", nic->dhcp);
> > + } else {
> > + str += sprintf_ipaddr(str, "ciaddr", nic->ip_addr);
> > + str += sprintf_ipaddr(str, "giaddr", nic->gateway);
> > + str += sprintf_ipaddr(str, "dnsaddr1", nic->primary_dns);
> > + str += sprintf_ipaddr(str, "dnsaddr2", nic->secondary_dns);
> > + }
> > + if (nic->hostname_len)
> > + str += sprintf_string(str, "hostname", nic->hostname_len,
> > + (char *)ibft_loc + nic->hostname_off);
> > + /* Cut off the comma. */
> > + str--;
> > +
> > + return str-buf;
> > +}
>
> Same here.
>
> > +ssize_t ibft_attr_show_target(struct ibft_kobject *entry,
> > + struct ibft_attribute *attr,
> > + char *buf)
> > +{
> > + struct ibft_tgt *tgt = attr->tgt;
> > + void *ibft_loc = entry->data->hdr;
> > + char *str = buf;
> > + int i;
> > +
> > + if (!tgt)
> > + return 0;
> > +
> > + str += sprintf_ipaddr(str, "siaddr", tgt->ip_addr);
> > + str += sprintf(str, "iport=%d,", tgt->port);
> > + str += sprintf(str, "ilun=");
> > + for (i = 0; i < 8; i++)
> > + str += sprintf(str, "%x", (u8)tgt->lun[i]);
> > + str += sprintf(str, ",");
> > +
> > + if (tgt->tgt_name_len)
> > + str += sprintf_string(str, "iname", tgt->tgt_name_len,
> > + (void *)ibft_loc + tgt->tgt_name_off);
> > +
> > + if (tgt->chap_name_len)
> > + str += sprintf_string(str, "chapid", tgt->chap_name_len,
> > + (char *)ibft_loc + tgt->chap_name_off);
> > + if (tgt->chap_secret_len)
> > + str += sprintf_string(str, "chappw", tgt->chap_secret_len,
> > + (char *)ibft_loc + tgt->chap_secret_off);
> > + if (tgt->rev_chap_name_len)
> > + str += sprintf_string(str, "ichapid", tgt->rev_chap_name_len,
> > + (char *)ibft_loc + tgt->rev_chap_name_off);
> > + if (tgt->rev_chap_secret_len)
> > + str += sprintf_string(str, "ichappw", tgt->rev_chap_secret_len,
> > + (char *)ibft_loc + tgt->rev_chap_secret_off);
> > +
> > + /* Cut off the comma. */
> > + str--;
> > +
> > + return str-buf;
> > +}
>
> Same here, are we writing a novella or something to userspace? :)
Yep. Just like real OFW.
>
> > +ssize_t ibft_attr_show_disk(struct ibft_kobject *dev,
> > + struct ibft_attribute *ibft_attr,
> > + char *buf)
> > +{
> > + char *str = buf;
> > +
> > + str += sprintf(str, "//ethernet@0,%d:iscsi,", dev->data->index);
> > + str += ibft_attr_show_initiator(dev, ibft_attr, str);
> > + str += sprintf(str, ",");
> > + str += ibft_attr_show_target(dev, ibft_attr, str);
> > + str += sprintf(str, ",");
> > + str += ibft_attr_show_nic(dev, ibft_attr, str);
> > +
> > + return str-buf;
> > +}
>
> And here, do I need to go on?
>
> > +ssize_t ibft_attr_show_mac(struct ibft_kobject *entry,
> > + struct ibft_attribute *attr,
> > + char *buf)
> > +{
> > + struct ibft_nic *nic = attr->nic;
> > + int len = 6;
> > +
> > + if (!nic)
> > + return 0;
> > +
> > + memcpy(buf, attr->nic->mac, len);
> > +
> > + return len;
> > +}
>
> Is mac a user readable string?
Nope. The actual value in OFW is u8[6] in BE. Again, this all input
for the fwparam_ppc parser.
++doug
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