898 строки
21 KiB
C
898 строки
21 KiB
C
/*
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* Copyright 2007-2010 Red Hat, Inc.
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* by Peter Jones <pjones@redhat.com>
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* Copyright 2008 IBM, Inc.
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* by Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
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* Copyright 2008
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* by Konrad Rzeszutek <ketuzsezr@darnok.org>
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*
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* This code exposes the iSCSI Boot Format Table to userland via sysfs.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License v2.0 as published by
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* the Free Software Foundation
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* Changelog:
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*
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* 06 Jan 2010 - Peter Jones <pjones@redhat.com>
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* New changelog entries are in the git log from now on. Not here.
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*
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* 14 Mar 2008 - Konrad Rzeszutek <ketuzsezr@darnok.org>
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* Updated comments and copyrights. (v0.4.9)
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*
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* 11 Feb 2008 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
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* Converted to using ibft_addr. (v0.4.8)
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*
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* 8 Feb 2008 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
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* Combined two functions in one: reserve_ibft_region. (v0.4.7)
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*
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* 30 Jan 2008 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
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* Added logic to handle IPv6 addresses. (v0.4.6)
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*
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* 25 Jan 2008 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
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* Added logic to handle badly not-to-spec iBFT. (v0.4.5)
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*
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* 4 Jan 2008 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
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* Added __init to function declarations. (v0.4.4)
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*
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* 21 Dec 2007 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
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* Updated kobject registration, combined unregister functions in one
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* and code and style cleanup. (v0.4.3)
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*
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* 5 Dec 2007 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
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* Added end-markers to enums and re-organized kobject registration. (v0.4.2)
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*
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* 4 Dec 2007 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
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* Created 'device' sysfs link to the NIC and style cleanup. (v0.4.1)
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*
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* 28 Nov 2007 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
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* Added sysfs-ibft documentation, moved 'find_ibft' function to
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* in its own file and added text attributes for every struct field. (v0.4)
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*
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* 21 Nov 2007 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
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* Added text attributes emulating OpenFirmware /proc/device-tree naming.
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* Removed binary /sysfs interface (v0.3)
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*
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* 29 Aug 2007 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
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* Added functionality in setup.c to reserve iBFT region. (v0.2)
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*
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* 27 Aug 2007 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
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* First version exposing iBFT data via a binary /sysfs. (v0.1)
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*
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*/
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#include <linux/blkdev.h>
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#include <linux/capability.h>
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#include <linux/ctype.h>
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#include <linux/device.h>
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#include <linux/err.h>
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#include <linux/init.h>
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#include <linux/iscsi_ibft.h>
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#include <linux/limits.h>
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/slab.h>
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#include <linux/stat.h>
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#include <linux/string.h>
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#include <linux/types.h>
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#include <linux/acpi.h>
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#include <linux/iscsi_boot_sysfs.h>
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#define IBFT_ISCSI_VERSION "0.5.0"
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#define IBFT_ISCSI_DATE "2010-Feb-25"
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MODULE_AUTHOR("Peter Jones <pjones@redhat.com> and "
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"Konrad Rzeszutek <ketuzsezr@darnok.org>");
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MODULE_DESCRIPTION("sysfs interface to BIOS iBFT information");
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MODULE_LICENSE("GPL");
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MODULE_VERSION(IBFT_ISCSI_VERSION);
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struct ibft_hdr {
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u8 id;
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u8 version;
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u16 length;
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u8 index;
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u8 flags;
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} __attribute__((__packed__));
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struct ibft_control {
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struct ibft_hdr hdr;
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u16 extensions;
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u16 initiator_off;
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u16 nic0_off;
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u16 tgt0_off;
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u16 nic1_off;
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u16 tgt1_off;
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} __attribute__((__packed__));
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struct ibft_initiator {
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struct ibft_hdr hdr;
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char isns_server[16];
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char slp_server[16];
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char pri_radius_server[16];
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char sec_radius_server[16];
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u16 initiator_name_len;
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u16 initiator_name_off;
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} __attribute__((__packed__));
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struct ibft_nic {
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struct ibft_hdr hdr;
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char ip_addr[16];
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u8 subnet_mask_prefix;
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u8 origin;
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char gateway[16];
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char primary_dns[16];
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char secondary_dns[16];
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char dhcp[16];
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u16 vlan;
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char mac[6];
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u16 pci_bdf;
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u16 hostname_len;
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u16 hostname_off;
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} __attribute__((__packed__));
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struct ibft_tgt {
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struct ibft_hdr hdr;
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char ip_addr[16];
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u16 port;
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char lun[8];
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u8 chap_type;
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u8 nic_assoc;
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u16 tgt_name_len;
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u16 tgt_name_off;
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u16 chap_name_len;
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u16 chap_name_off;
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u16 chap_secret_len;
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u16 chap_secret_off;
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u16 rev_chap_name_len;
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u16 rev_chap_name_off;
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u16 rev_chap_secret_len;
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u16 rev_chap_secret_off;
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} __attribute__((__packed__));
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/*
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* The kobject different types and its names.
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*
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*/
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enum ibft_id {
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id_reserved = 0, /* We don't support. */
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id_control = 1, /* Should show up only once and is not exported. */
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id_initiator = 2,
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id_nic = 3,
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id_target = 4,
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id_extensions = 5, /* We don't support. */
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id_end_marker,
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};
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/*
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* The kobject and attribute structures.
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*/
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struct ibft_kobject {
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struct acpi_table_ibft *header;
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union {
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struct ibft_initiator *initiator;
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struct ibft_nic *nic;
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struct ibft_tgt *tgt;
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struct ibft_hdr *hdr;
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};
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};
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static struct iscsi_boot_kset *boot_kset;
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/* fully null address */
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static const char nulls[16];
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/* IPv4-mapped IPv6 ::ffff:0.0.0.0 */
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static const char mapped_nulls[16] = { 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0xff, 0xff,
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0x00, 0x00, 0x00, 0x00 };
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static int address_not_null(u8 *ip)
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{
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return (memcmp(ip, nulls, 16) && memcmp(ip, mapped_nulls, 16));
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}
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/*
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* Helper functions to parse data properly.
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*/
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static ssize_t sprintf_ipaddr(char *buf, u8 *ip)
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{
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char *str = buf;
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if (ip[0] == 0 && ip[1] == 0 && ip[2] == 0 && ip[3] == 0 &&
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ip[4] == 0 && ip[5] == 0 && ip[6] == 0 && ip[7] == 0 &&
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ip[8] == 0 && ip[9] == 0 && ip[10] == 0xff && ip[11] == 0xff) {
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/*
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* IPV4
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*/
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str += sprintf(buf, "%pI4", ip + 12);
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} else {
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/*
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* IPv6
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*/
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str += sprintf(str, "%pI6", ip);
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}
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str += sprintf(str, "\n");
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return str - buf;
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}
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static ssize_t sprintf_string(char *str, int len, char *buf)
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{
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return sprintf(str, "%.*s\n", len, buf);
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}
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/*
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* Helper function to verify the IBFT header.
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*/
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static int ibft_verify_hdr(char *t, struct ibft_hdr *hdr, int id, int length)
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{
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if (hdr->id != id) {
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printk(KERN_ERR "iBFT error: We expected the %s " \
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"field header.id to have %d but " \
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"found %d instead!\n", t, id, hdr->id);
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return -ENODEV;
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}
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if (hdr->length != length) {
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printk(KERN_ERR "iBFT error: We expected the %s " \
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"field header.length to have %d but " \
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"found %d instead!\n", t, length, hdr->length);
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return -ENODEV;
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}
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return 0;
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}
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/*
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* Routines for parsing the iBFT data to be human readable.
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*/
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static ssize_t ibft_attr_show_initiator(void *data, int type, char *buf)
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{
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struct ibft_kobject *entry = data;
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struct ibft_initiator *initiator = entry->initiator;
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void *ibft_loc = entry->header;
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char *str = buf;
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if (!initiator)
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return 0;
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switch (type) {
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case ISCSI_BOOT_INI_INDEX:
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str += sprintf(str, "%d\n", initiator->hdr.index);
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break;
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case ISCSI_BOOT_INI_FLAGS:
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str += sprintf(str, "%d\n", initiator->hdr.flags);
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break;
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case ISCSI_BOOT_INI_ISNS_SERVER:
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str += sprintf_ipaddr(str, initiator->isns_server);
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break;
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case ISCSI_BOOT_INI_SLP_SERVER:
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str += sprintf_ipaddr(str, initiator->slp_server);
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break;
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case ISCSI_BOOT_INI_PRI_RADIUS_SERVER:
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str += sprintf_ipaddr(str, initiator->pri_radius_server);
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break;
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case ISCSI_BOOT_INI_SEC_RADIUS_SERVER:
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str += sprintf_ipaddr(str, initiator->sec_radius_server);
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break;
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case ISCSI_BOOT_INI_INITIATOR_NAME:
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str += sprintf_string(str, initiator->initiator_name_len,
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(char *)ibft_loc +
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initiator->initiator_name_off);
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break;
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default:
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break;
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}
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return str - buf;
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}
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static ssize_t ibft_attr_show_nic(void *data, int type, char *buf)
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{
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struct ibft_kobject *entry = data;
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struct ibft_nic *nic = entry->nic;
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void *ibft_loc = entry->header;
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char *str = buf;
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__be32 val;
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if (!nic)
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return 0;
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switch (type) {
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case ISCSI_BOOT_ETH_INDEX:
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str += sprintf(str, "%d\n", nic->hdr.index);
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break;
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case ISCSI_BOOT_ETH_FLAGS:
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str += sprintf(str, "%d\n", nic->hdr.flags);
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break;
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case ISCSI_BOOT_ETH_IP_ADDR:
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str += sprintf_ipaddr(str, nic->ip_addr);
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break;
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case ISCSI_BOOT_ETH_SUBNET_MASK:
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val = cpu_to_be32(~((1 << (32-nic->subnet_mask_prefix))-1));
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str += sprintf(str, "%pI4", &val);
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break;
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case ISCSI_BOOT_ETH_PREFIX_LEN:
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str += sprintf(str, "%d\n", nic->subnet_mask_prefix);
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break;
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case ISCSI_BOOT_ETH_ORIGIN:
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str += sprintf(str, "%d\n", nic->origin);
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break;
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case ISCSI_BOOT_ETH_GATEWAY:
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str += sprintf_ipaddr(str, nic->gateway);
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break;
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case ISCSI_BOOT_ETH_PRIMARY_DNS:
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str += sprintf_ipaddr(str, nic->primary_dns);
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break;
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case ISCSI_BOOT_ETH_SECONDARY_DNS:
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str += sprintf_ipaddr(str, nic->secondary_dns);
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break;
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case ISCSI_BOOT_ETH_DHCP:
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str += sprintf_ipaddr(str, nic->dhcp);
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break;
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case ISCSI_BOOT_ETH_VLAN:
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str += sprintf(str, "%d\n", nic->vlan);
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break;
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case ISCSI_BOOT_ETH_MAC:
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str += sprintf(str, "%pM\n", nic->mac);
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break;
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case ISCSI_BOOT_ETH_HOSTNAME:
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str += sprintf_string(str, nic->hostname_len,
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(char *)ibft_loc + nic->hostname_off);
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break;
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default:
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break;
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}
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return str - buf;
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};
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static ssize_t ibft_attr_show_target(void *data, int type, char *buf)
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{
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struct ibft_kobject *entry = data;
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struct ibft_tgt *tgt = entry->tgt;
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void *ibft_loc = entry->header;
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char *str = buf;
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int i;
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if (!tgt)
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return 0;
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switch (type) {
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case ISCSI_BOOT_TGT_INDEX:
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str += sprintf(str, "%d\n", tgt->hdr.index);
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break;
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case ISCSI_BOOT_TGT_FLAGS:
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str += sprintf(str, "%d\n", tgt->hdr.flags);
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break;
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case ISCSI_BOOT_TGT_IP_ADDR:
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str += sprintf_ipaddr(str, tgt->ip_addr);
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break;
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case ISCSI_BOOT_TGT_PORT:
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str += sprintf(str, "%d\n", tgt->port);
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break;
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case ISCSI_BOOT_TGT_LUN:
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for (i = 0; i < 8; i++)
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str += sprintf(str, "%x", (u8)tgt->lun[i]);
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str += sprintf(str, "\n");
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break;
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case ISCSI_BOOT_TGT_NIC_ASSOC:
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str += sprintf(str, "%d\n", tgt->nic_assoc);
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break;
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case ISCSI_BOOT_TGT_CHAP_TYPE:
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str += sprintf(str, "%d\n", tgt->chap_type);
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break;
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case ISCSI_BOOT_TGT_NAME:
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str += sprintf_string(str, tgt->tgt_name_len,
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(char *)ibft_loc + tgt->tgt_name_off);
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break;
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case ISCSI_BOOT_TGT_CHAP_NAME:
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str += sprintf_string(str, tgt->chap_name_len,
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(char *)ibft_loc + tgt->chap_name_off);
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break;
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case ISCSI_BOOT_TGT_CHAP_SECRET:
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str += sprintf_string(str, tgt->chap_secret_len,
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(char *)ibft_loc + tgt->chap_secret_off);
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break;
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case ISCSI_BOOT_TGT_REV_CHAP_NAME:
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str += sprintf_string(str, tgt->rev_chap_name_len,
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(char *)ibft_loc +
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tgt->rev_chap_name_off);
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break;
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case ISCSI_BOOT_TGT_REV_CHAP_SECRET:
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str += sprintf_string(str, tgt->rev_chap_secret_len,
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(char *)ibft_loc +
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tgt->rev_chap_secret_off);
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break;
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default:
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break;
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}
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return str - buf;
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}
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static ssize_t ibft_attr_show_acpitbl(void *data, int type, char *buf)
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{
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struct ibft_kobject *entry = data;
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char *str = buf;
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switch (type) {
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case ISCSI_BOOT_ACPITBL_SIGNATURE:
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str += sprintf_string(str, ACPI_NAME_SIZE,
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entry->header->header.signature);
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break;
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case ISCSI_BOOT_ACPITBL_OEM_ID:
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str += sprintf_string(str, ACPI_OEM_ID_SIZE,
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entry->header->header.oem_id);
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break;
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case ISCSI_BOOT_ACPITBL_OEM_TABLE_ID:
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str += sprintf_string(str, ACPI_OEM_TABLE_ID_SIZE,
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entry->header->header.oem_table_id);
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break;
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default:
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break;
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}
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return str - buf;
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}
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static int __init ibft_check_device(void)
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{
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int len;
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u8 *pos;
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u8 csum = 0;
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len = ibft_addr->header.length;
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/* Sanity checking of iBFT. */
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if (ibft_addr->header.revision != 1) {
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printk(KERN_ERR "iBFT module supports only revision 1, " \
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"while this is %d.\n",
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ibft_addr->header.revision);
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return -ENOENT;
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}
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for (pos = (u8 *)ibft_addr; pos < (u8 *)ibft_addr + len; pos++)
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csum += *pos;
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if (csum) {
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printk(KERN_ERR "iBFT has incorrect checksum (0x%x)!\n", csum);
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return -ENOENT;
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}
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return 0;
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}
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/*
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* Helper routiners to check to determine if the entry is valid
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* in the proper iBFT structure.
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*/
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static umode_t ibft_check_nic_for(void *data, int type)
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{
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struct ibft_kobject *entry = data;
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struct ibft_nic *nic = entry->nic;
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umode_t rc = 0;
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switch (type) {
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case ISCSI_BOOT_ETH_INDEX:
|
|
case ISCSI_BOOT_ETH_FLAGS:
|
|
rc = S_IRUGO;
|
|
break;
|
|
case ISCSI_BOOT_ETH_IP_ADDR:
|
|
if (address_not_null(nic->ip_addr))
|
|
rc = S_IRUGO;
|
|
break;
|
|
case ISCSI_BOOT_ETH_PREFIX_LEN:
|
|
case ISCSI_BOOT_ETH_SUBNET_MASK:
|
|
if (nic->subnet_mask_prefix)
|
|
rc = S_IRUGO;
|
|
break;
|
|
case ISCSI_BOOT_ETH_ORIGIN:
|
|
rc = S_IRUGO;
|
|
break;
|
|
case ISCSI_BOOT_ETH_GATEWAY:
|
|
if (address_not_null(nic->gateway))
|
|
rc = S_IRUGO;
|
|
break;
|
|
case ISCSI_BOOT_ETH_PRIMARY_DNS:
|
|
if (address_not_null(nic->primary_dns))
|
|
rc = S_IRUGO;
|
|
break;
|
|
case ISCSI_BOOT_ETH_SECONDARY_DNS:
|
|
if (address_not_null(nic->secondary_dns))
|
|
rc = S_IRUGO;
|
|
break;
|
|
case ISCSI_BOOT_ETH_DHCP:
|
|
if (address_not_null(nic->dhcp))
|
|
rc = S_IRUGO;
|
|
break;
|
|
case ISCSI_BOOT_ETH_VLAN:
|
|
case ISCSI_BOOT_ETH_MAC:
|
|
rc = S_IRUGO;
|
|
break;
|
|
case ISCSI_BOOT_ETH_HOSTNAME:
|
|
if (nic->hostname_off)
|
|
rc = S_IRUGO;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
static umode_t __init ibft_check_tgt_for(void *data, int type)
|
|
{
|
|
struct ibft_kobject *entry = data;
|
|
struct ibft_tgt *tgt = entry->tgt;
|
|
umode_t rc = 0;
|
|
|
|
switch (type) {
|
|
case ISCSI_BOOT_TGT_INDEX:
|
|
case ISCSI_BOOT_TGT_FLAGS:
|
|
case ISCSI_BOOT_TGT_IP_ADDR:
|
|
case ISCSI_BOOT_TGT_PORT:
|
|
case ISCSI_BOOT_TGT_LUN:
|
|
case ISCSI_BOOT_TGT_NIC_ASSOC:
|
|
case ISCSI_BOOT_TGT_CHAP_TYPE:
|
|
rc = S_IRUGO;
|
|
case ISCSI_BOOT_TGT_NAME:
|
|
if (tgt->tgt_name_len)
|
|
rc = S_IRUGO;
|
|
break;
|
|
case ISCSI_BOOT_TGT_CHAP_NAME:
|
|
case ISCSI_BOOT_TGT_CHAP_SECRET:
|
|
if (tgt->chap_name_len)
|
|
rc = S_IRUGO;
|
|
break;
|
|
case ISCSI_BOOT_TGT_REV_CHAP_NAME:
|
|
case ISCSI_BOOT_TGT_REV_CHAP_SECRET:
|
|
if (tgt->rev_chap_name_len)
|
|
rc = S_IRUGO;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
static umode_t __init ibft_check_initiator_for(void *data, int type)
|
|
{
|
|
struct ibft_kobject *entry = data;
|
|
struct ibft_initiator *init = entry->initiator;
|
|
umode_t rc = 0;
|
|
|
|
switch (type) {
|
|
case ISCSI_BOOT_INI_INDEX:
|
|
case ISCSI_BOOT_INI_FLAGS:
|
|
rc = S_IRUGO;
|
|
break;
|
|
case ISCSI_BOOT_INI_ISNS_SERVER:
|
|
if (address_not_null(init->isns_server))
|
|
rc = S_IRUGO;
|
|
break;
|
|
case ISCSI_BOOT_INI_SLP_SERVER:
|
|
if (address_not_null(init->slp_server))
|
|
rc = S_IRUGO;
|
|
break;
|
|
case ISCSI_BOOT_INI_PRI_RADIUS_SERVER:
|
|
if (address_not_null(init->pri_radius_server))
|
|
rc = S_IRUGO;
|
|
break;
|
|
case ISCSI_BOOT_INI_SEC_RADIUS_SERVER:
|
|
if (address_not_null(init->sec_radius_server))
|
|
rc = S_IRUGO;
|
|
break;
|
|
case ISCSI_BOOT_INI_INITIATOR_NAME:
|
|
if (init->initiator_name_len)
|
|
rc = S_IRUGO;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
static umode_t __init ibft_check_acpitbl_for(void *data, int type)
|
|
{
|
|
|
|
umode_t rc = 0;
|
|
|
|
switch (type) {
|
|
case ISCSI_BOOT_ACPITBL_SIGNATURE:
|
|
case ISCSI_BOOT_ACPITBL_OEM_ID:
|
|
case ISCSI_BOOT_ACPITBL_OEM_TABLE_ID:
|
|
rc = S_IRUGO;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
static void ibft_kobj_release(void *data)
|
|
{
|
|
kfree(data);
|
|
}
|
|
|
|
/*
|
|
* Helper function for ibft_register_kobjects.
|
|
*/
|
|
static int __init ibft_create_kobject(struct acpi_table_ibft *header,
|
|
struct ibft_hdr *hdr)
|
|
{
|
|
struct iscsi_boot_kobj *boot_kobj = NULL;
|
|
struct ibft_kobject *ibft_kobj = NULL;
|
|
struct ibft_nic *nic = (struct ibft_nic *)hdr;
|
|
struct pci_dev *pci_dev;
|
|
int rc = 0;
|
|
|
|
ibft_kobj = kzalloc(sizeof(*ibft_kobj), GFP_KERNEL);
|
|
if (!ibft_kobj)
|
|
return -ENOMEM;
|
|
|
|
ibft_kobj->header = header;
|
|
ibft_kobj->hdr = hdr;
|
|
|
|
switch (hdr->id) {
|
|
case id_initiator:
|
|
rc = ibft_verify_hdr("initiator", hdr, id_initiator,
|
|
sizeof(*ibft_kobj->initiator));
|
|
if (rc)
|
|
break;
|
|
|
|
boot_kobj = iscsi_boot_create_initiator(boot_kset, hdr->index,
|
|
ibft_kobj,
|
|
ibft_attr_show_initiator,
|
|
ibft_check_initiator_for,
|
|
ibft_kobj_release);
|
|
if (!boot_kobj) {
|
|
rc = -ENOMEM;
|
|
goto free_ibft_obj;
|
|
}
|
|
break;
|
|
case id_nic:
|
|
rc = ibft_verify_hdr("ethernet", hdr, id_nic,
|
|
sizeof(*ibft_kobj->nic));
|
|
if (rc)
|
|
break;
|
|
|
|
boot_kobj = iscsi_boot_create_ethernet(boot_kset, hdr->index,
|
|
ibft_kobj,
|
|
ibft_attr_show_nic,
|
|
ibft_check_nic_for,
|
|
ibft_kobj_release);
|
|
if (!boot_kobj) {
|
|
rc = -ENOMEM;
|
|
goto free_ibft_obj;
|
|
}
|
|
break;
|
|
case id_target:
|
|
rc = ibft_verify_hdr("target", hdr, id_target,
|
|
sizeof(*ibft_kobj->tgt));
|
|
if (rc)
|
|
break;
|
|
|
|
boot_kobj = iscsi_boot_create_target(boot_kset, hdr->index,
|
|
ibft_kobj,
|
|
ibft_attr_show_target,
|
|
ibft_check_tgt_for,
|
|
ibft_kobj_release);
|
|
if (!boot_kobj) {
|
|
rc = -ENOMEM;
|
|
goto free_ibft_obj;
|
|
}
|
|
break;
|
|
case id_reserved:
|
|
case id_control:
|
|
case id_extensions:
|
|
/* Fields which we don't support. Ignore them */
|
|
rc = 1;
|
|
break;
|
|
default:
|
|
printk(KERN_ERR "iBFT has unknown structure type (%d). " \
|
|
"Report this bug to %.6s!\n", hdr->id,
|
|
header->header.oem_id);
|
|
rc = 1;
|
|
break;
|
|
}
|
|
|
|
if (rc) {
|
|
/* Skip adding this kobject, but exit with non-fatal error. */
|
|
rc = 0;
|
|
goto free_ibft_obj;
|
|
}
|
|
|
|
if (hdr->id == id_nic) {
|
|
/*
|
|
* We don't search for the device in other domains than
|
|
* zero. This is because on x86 platforms the BIOS
|
|
* executes only devices which are in domain 0. Furthermore, the
|
|
* iBFT spec doesn't have a domain id field :-(
|
|
*/
|
|
pci_dev = pci_get_domain_bus_and_slot(0,
|
|
(nic->pci_bdf & 0xff00) >> 8,
|
|
(nic->pci_bdf & 0xff));
|
|
if (pci_dev) {
|
|
rc = sysfs_create_link(&boot_kobj->kobj,
|
|
&pci_dev->dev.kobj, "device");
|
|
pci_dev_put(pci_dev);
|
|
}
|
|
}
|
|
return 0;
|
|
|
|
free_ibft_obj:
|
|
kfree(ibft_kobj);
|
|
return rc;
|
|
}
|
|
|
|
/*
|
|
* Scan the IBFT table structure for the NIC and Target fields. When
|
|
* found add them on the passed-in list. We do not support the other
|
|
* fields at this point, so they are skipped.
|
|
*/
|
|
static int __init ibft_register_kobjects(struct acpi_table_ibft *header)
|
|
{
|
|
struct ibft_control *control = NULL;
|
|
struct iscsi_boot_kobj *boot_kobj;
|
|
struct ibft_kobject *ibft_kobj;
|
|
void *ptr, *end;
|
|
int rc = 0;
|
|
u16 offset;
|
|
u16 eot_offset;
|
|
|
|
control = (void *)header + sizeof(*header);
|
|
end = (void *)control + control->hdr.length;
|
|
eot_offset = (void *)header + header->header.length - (void *)control;
|
|
rc = ibft_verify_hdr("control", (struct ibft_hdr *)control, id_control,
|
|
sizeof(*control));
|
|
|
|
/* iBFT table safety checking */
|
|
rc |= ((control->hdr.index) ? -ENODEV : 0);
|
|
if (rc) {
|
|
printk(KERN_ERR "iBFT error: Control header is invalid!\n");
|
|
return rc;
|
|
}
|
|
for (ptr = &control->initiator_off; ptr < end; ptr += sizeof(u16)) {
|
|
offset = *(u16 *)ptr;
|
|
if (offset && offset < header->header.length &&
|
|
offset < eot_offset) {
|
|
rc = ibft_create_kobject(header,
|
|
(void *)header + offset);
|
|
if (rc)
|
|
break;
|
|
}
|
|
}
|
|
if (rc)
|
|
return rc;
|
|
|
|
ibft_kobj = kzalloc(sizeof(*ibft_kobj), GFP_KERNEL);
|
|
if (!ibft_kobj)
|
|
return -ENOMEM;
|
|
|
|
ibft_kobj->header = header;
|
|
ibft_kobj->hdr = NULL; /*for ibft_unregister*/
|
|
|
|
boot_kobj = iscsi_boot_create_acpitbl(boot_kset, 0,
|
|
ibft_kobj,
|
|
ibft_attr_show_acpitbl,
|
|
ibft_check_acpitbl_for,
|
|
ibft_kobj_release);
|
|
if (!boot_kobj) {
|
|
kfree(ibft_kobj);
|
|
rc = -ENOMEM;
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
static void ibft_unregister(void)
|
|
{
|
|
struct iscsi_boot_kobj *boot_kobj, *tmp_kobj;
|
|
struct ibft_kobject *ibft_kobj;
|
|
|
|
list_for_each_entry_safe(boot_kobj, tmp_kobj,
|
|
&boot_kset->kobj_list, list) {
|
|
ibft_kobj = boot_kobj->data;
|
|
if (ibft_kobj->hdr && ibft_kobj->hdr->id == id_nic)
|
|
sysfs_remove_link(&boot_kobj->kobj, "device");
|
|
};
|
|
}
|
|
|
|
static void ibft_cleanup(void)
|
|
{
|
|
if (boot_kset) {
|
|
ibft_unregister();
|
|
iscsi_boot_destroy_kset(boot_kset);
|
|
}
|
|
}
|
|
|
|
static void __exit ibft_exit(void)
|
|
{
|
|
ibft_cleanup();
|
|
}
|
|
|
|
#ifdef CONFIG_ACPI
|
|
static const struct {
|
|
char *sign;
|
|
} ibft_signs[] = {
|
|
/*
|
|
* One spec says "IBFT", the other says "iBFT". We have to check
|
|
* for both.
|
|
*/
|
|
{ ACPI_SIG_IBFT },
|
|
{ "iBFT" },
|
|
{ "BIFT" }, /* Broadcom iSCSI Offload */
|
|
};
|
|
|
|
static void __init acpi_find_ibft_region(void)
|
|
{
|
|
int i;
|
|
struct acpi_table_header *table = NULL;
|
|
|
|
if (acpi_disabled)
|
|
return;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(ibft_signs) && !ibft_addr; i++) {
|
|
acpi_get_table(ibft_signs[i].sign, 0, &table);
|
|
ibft_addr = (struct acpi_table_ibft *)table;
|
|
}
|
|
}
|
|
#else
|
|
static void __init acpi_find_ibft_region(void)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* ibft_init() - creates sysfs tree entries for the iBFT data.
|
|
*/
|
|
static int __init ibft_init(void)
|
|
{
|
|
int rc = 0;
|
|
|
|
/*
|
|
As on UEFI systems the setup_arch()/find_ibft_region()
|
|
is called before ACPI tables are parsed and it only does
|
|
legacy finding.
|
|
*/
|
|
if (!ibft_addr)
|
|
acpi_find_ibft_region();
|
|
|
|
if (ibft_addr) {
|
|
pr_info("iBFT detected.\n");
|
|
|
|
rc = ibft_check_device();
|
|
if (rc)
|
|
return rc;
|
|
|
|
boot_kset = iscsi_boot_create_kset("ibft");
|
|
if (!boot_kset)
|
|
return -ENOMEM;
|
|
|
|
/* Scan the IBFT for data and register the kobjects. */
|
|
rc = ibft_register_kobjects(ibft_addr);
|
|
if (rc)
|
|
goto out_free;
|
|
} else
|
|
printk(KERN_INFO "No iBFT detected.\n");
|
|
|
|
return 0;
|
|
|
|
out_free:
|
|
ibft_cleanup();
|
|
return rc;
|
|
}
|
|
|
|
module_init(ibft_init);
|
|
module_exit(ibft_exit);
|