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894 lines
21 KiB
894 lines
21 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Copyright 2007-2010 Red Hat, Inc. |
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* by Peter Jones <[email protected]> |
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* Copyright 2008 IBM, Inc. |
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* by Konrad Rzeszutek <[email protected]> |
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* Copyright 2008 |
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* by Konrad Rzeszutek <[email protected]> |
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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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* Changelog: |
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* |
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* 06 Jan 2010 - Peter Jones <[email protected]> |
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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 <[email protected]> |
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* Updated comments and copyrights. (v0.4.9) |
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* |
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* 11 Feb 2008 - Konrad Rzeszutek <[email protected]> |
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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 <[email protected]> |
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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 <[email protected]> |
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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 <[email protected]> |
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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 <[email protected]> |
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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 <[email protected]> |
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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 <[email protected]> |
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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 <[email protected]> |
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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 <[email protected]> |
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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 <[email protected]> |
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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 <[email protected]> |
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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 <[email protected]> |
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* First version exposing iBFT data via a binary /sysfs. (v0.1) |
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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 <[email protected]> and " |
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"Konrad Rzeszutek <[email protected]>"); |
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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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#ifndef CONFIG_ISCSI_IBFT_FIND |
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struct acpi_table_ibft *ibft_addr; |
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#endif |
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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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u16 expansion[]; |
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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 (length && 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_NAMESEG_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: |
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case ISCSI_BOOT_ETH_FLAGS: |
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rc = S_IRUGO; |
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break; |
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case ISCSI_BOOT_ETH_IP_ADDR: |
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if (address_not_null(nic->ip_addr)) |
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rc = S_IRUGO; |
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break; |
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case ISCSI_BOOT_ETH_PREFIX_LEN: |
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case ISCSI_BOOT_ETH_SUBNET_MASK: |
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if (nic->subnet_mask_prefix) |
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rc = S_IRUGO; |
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break; |
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case ISCSI_BOOT_ETH_ORIGIN: |
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rc = S_IRUGO; |
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break; |
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case ISCSI_BOOT_ETH_GATEWAY: |
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if (address_not_null(nic->gateway)) |
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rc = S_IRUGO; |
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break; |
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case ISCSI_BOOT_ETH_PRIMARY_DNS: |
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if (address_not_null(nic->primary_dns)) |
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rc = S_IRUGO; |
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break; |
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case ISCSI_BOOT_ETH_SECONDARY_DNS: |
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if (address_not_null(nic->secondary_dns)) |
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rc = S_IRUGO; |
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break; |
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case ISCSI_BOOT_ETH_DHCP: |
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if (address_not_null(nic->dhcp)) |
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rc = S_IRUGO; |
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break; |
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case ISCSI_BOOT_ETH_VLAN: |
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case ISCSI_BOOT_ETH_MAC: |
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rc = S_IRUGO; |
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break; |
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case ISCSI_BOOT_ETH_HOSTNAME: |
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if (nic->hostname_off) |
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rc = S_IRUGO; |
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break; |
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default: |
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break; |
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} |
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return rc; |
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} |
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static umode_t __init ibft_check_tgt_for(void *data, int type) |
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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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umode_t rc = 0; |
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switch (type) { |
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case ISCSI_BOOT_TGT_INDEX: |
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case ISCSI_BOOT_TGT_FLAGS: |
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case ISCSI_BOOT_TGT_IP_ADDR: |
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case ISCSI_BOOT_TGT_PORT: |
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case ISCSI_BOOT_TGT_LUN: |
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case ISCSI_BOOT_TGT_NIC_ASSOC: |
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case ISCSI_BOOT_TGT_CHAP_TYPE: |
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rc = S_IRUGO; |
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break; |
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case ISCSI_BOOT_TGT_NAME: |
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if (tgt->tgt_name_len) |
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rc = S_IRUGO; |
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break; |
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case ISCSI_BOOT_TGT_CHAP_NAME: |
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case ISCSI_BOOT_TGT_CHAP_SECRET: |
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if (tgt->chap_name_len) |
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rc = S_IRUGO; |
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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, 0); |
|
|
|
/* iBFT table safety checking */ |
|
rc |= ((control->hdr.index) ? -ENODEV : 0); |
|
rc |= ((control->hdr.length < sizeof(*control)) ? -ENODEV : 0); |
|
if (rc) { |
|
printk(KERN_ERR "iBFT error: Control header is invalid!\n"); |
|
return rc; |
|
} |
|
for (ptr = &control->initiator_off; ptr + sizeof(u16) <= 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);
|
|
|