cregit-Linux how code gets into the kernel

Release 4.11 drivers/firmware/iscsi_ibft.c

Directory: drivers/firmware
/*
 *  Copyright 2007-2010 Red Hat, Inc.
 *  by Peter Jones <pjones@redhat.com>
 *  Copyright 2008 IBM, Inc.
 *  by Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
 *  Copyright 2008
 *  by Konrad Rzeszutek <ketuzsezr@darnok.org>
 *
 * This code exposes the iSCSI Boot Format Table to userland via sysfs.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License v2.0 as published by
 * the Free Software Foundation
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * Changelog:
 *
 *  06 Jan 2010 - Peter Jones <pjones@redhat.com>
 *    New changelog entries are in the git log from now on.  Not here.
 *
 *  14 Mar 2008 - Konrad Rzeszutek <ketuzsezr@darnok.org>
 *    Updated comments and copyrights. (v0.4.9)
 *
 *  11 Feb 2008 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
 *    Converted to using ibft_addr. (v0.4.8)
 *
 *   8 Feb 2008 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
 *    Combined two functions in one: reserve_ibft_region. (v0.4.7)
 *
 *  30 Jan 2008 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
 *   Added logic to handle IPv6 addresses. (v0.4.6)
 *
 *  25 Jan 2008 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
 *   Added logic to handle badly not-to-spec iBFT. (v0.4.5)
 *
 *   4 Jan 2008 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
 *   Added __init to function declarations. (v0.4.4)
 *
 *  21 Dec 2007 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
 *   Updated kobject registration, combined unregister functions in one
 *   and code and style cleanup. (v0.4.3)
 *
 *   5 Dec 2007 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
 *   Added end-markers to enums and re-organized kobject registration. (v0.4.2)
 *
 *   4 Dec 2007 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
 *   Created 'device' sysfs link to the NIC and style cleanup. (v0.4.1)
 *
 *  28 Nov 2007 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
 *   Added sysfs-ibft documentation, moved 'find_ibft' function to
 *   in its own file and added text attributes for every struct field.  (v0.4)
 *
 *  21 Nov 2007 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
 *   Added text attributes emulating OpenFirmware /proc/device-tree naming.
 *   Removed binary /sysfs interface (v0.3)
 *
 *  29 Aug 2007 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
 *   Added functionality in setup.c to reserve iBFT region. (v0.2)
 *
 *  27 Aug 2007 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
 *   First version exposing iBFT data via a binary /sysfs. (v0.1)
 *
 */


#include <linux/blkdev.h>
#include <linux/capability.h>
#include <linux/ctype.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/iscsi_ibft.h>
#include <linux/limits.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/stat.h>
#include <linux/string.h>
#include <linux/types.h>
#include <linux/acpi.h>
#include <linux/iscsi_boot_sysfs.h>


#define IBFT_ISCSI_VERSION "0.5.0"

#define IBFT_ISCSI_DATE "2010-Feb-25"

MODULE_AUTHOR("Peter Jones <pjones@redhat.com> and "
	      "Konrad Rzeszutek <ketuzsezr@darnok.org>");
MODULE_DESCRIPTION("sysfs interface to BIOS iBFT information");
MODULE_LICENSE("GPL");

MODULE_VERSION(IBFT_ISCSI_VERSION);


struct ibft_hdr {
	
u8 id;
	
u8 version;
	
u16 length;
	
u8 index;
	
u8 flags;
} __attribute__((__packed__));


struct ibft_control {
	
struct ibft_hdr hdr;
	
u16 extensions;
	
u16 initiator_off;
	
u16 nic0_off;
	
u16 tgt0_off;
	
u16 nic1_off;
	
u16 tgt1_off;
} __attribute__((__packed__));


struct ibft_initiator {
	
struct ibft_hdr hdr;
	
char isns_server[16];
	
char slp_server[16];
	
char pri_radius_server[16];
	
char sec_radius_server[16];
	
u16 initiator_name_len;
	
u16 initiator_name_off;
} __attribute__((__packed__));


struct ibft_nic {
	
struct ibft_hdr hdr;
	
char ip_addr[16];
	
u8 subnet_mask_prefix;
	
u8 origin;
	
char gateway[16];
	
char primary_dns[16];
	
char secondary_dns[16];
	
char dhcp[16];
	
u16 vlan;
	
char mac[6];
	
u16 pci_bdf;
	
u16 hostname_len;
	
u16 hostname_off;
} __attribute__((__packed__));


struct ibft_tgt {
	
struct ibft_hdr hdr;
	
char ip_addr[16];
	
u16 port;
	
char lun[8];
	
u8 chap_type;
	
u8 nic_assoc;
	
u16 tgt_name_len;
	
u16 tgt_name_off;
	
u16 chap_name_len;
	
u16 chap_name_off;
	
u16 chap_secret_len;
	
u16 chap_secret_off;
	
u16 rev_chap_name_len;
	
u16 rev_chap_name_off;
	
u16 rev_chap_secret_len;
	
u16 rev_chap_secret_off;
} __attribute__((__packed__));

/*
 * The kobject different types and its names.
 *
*/

enum ibft_id {
	
id_reserved = 0, /* We don't support. */
	
id_control = 1, /* Should show up only once and is not exported. */
	
id_initiator = 2,
	
id_nic = 3,
	
id_target = 4,
	
id_extensions = 5, /* We don't support. */
	
id_end_marker,
};

/*
 * The kobject and attribute structures.
 */


struct ibft_kobject {
	
struct acpi_table_ibft *header;
	union {
		
struct ibft_initiator *initiator;
		
struct ibft_nic *nic;
		
struct ibft_tgt *tgt;
		
struct ibft_hdr *hdr;
	};
};


static struct iscsi_boot_kset *boot_kset;

/* fully null address */

static const char nulls[16];

/* IPv4-mapped IPv6 ::ffff:0.0.0.0 */

static const char mapped_nulls[16] = { 0x00, 0x00, 0x00, 0x00,
                                       0x00, 0x00, 0x00, 0x00,
                                       0x00, 0x00, 0xff, 0xff,
                                       0x00, 0x00, 0x00, 0x00 };


static int address_not_null(u8 *ip) { return (memcmp(ip, nulls, 16) && memcmp(ip, mapped_nulls, 16)); }

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Christopher Leech31100.00%1100.00%
Total31100.00%1100.00%

/* * Helper functions to parse data properly. */
static ssize_t sprintf_ipaddr(char *buf, u8 *ip) { char *str = buf; if (ip[0] == 0 && ip[1] == 0 && ip[2] == 0 && ip[3] == 0 && ip[4] == 0 && ip[5] == 0 && ip[6] == 0 && ip[7] == 0 && ip[8] == 0 && ip[9] == 0 && ip[10] == 0xff && ip[11] == 0xff) { /* * IPV4 */ str += sprintf(buf, "%pI4", ip + 12); } else { /* * IPv6 */ str += sprintf(str, "%pI6", ip); } str += sprintf(str, "\n"); return str - buf; }

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Konrad Rzeszutek Wilk14898.01%133.33%
Harvey Harrison31.99%266.67%
Total151100.00%3100.00%


static ssize_t sprintf_string(char *str, int len, char *buf) { return sprintf(str, "%.*s\n", len, buf); }

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Konrad Rzeszutek Wilk29100.00%1100.00%
Total29100.00%1100.00%

/* * Helper function to verify the IBFT header. */
static int ibft_verify_hdr(char *t, struct ibft_hdr *hdr, int id, int length) { if (hdr->id != id) { printk(KERN_ERR "iBFT error: We expected the %s " \ "field header.id to have %d but " \ "found %d instead!\n", t, id, hdr->id); return -ENODEV; } if (hdr->length != length) { printk(KERN_ERR "iBFT error: We expected the %s " \ "field header.length to have %d but " \ "found %d instead!\n", t, length, hdr->length); return -ENODEV; } return 0; }

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Konrad Rzeszutek Wilk8293.18%150.00%
Mike Christie66.82%150.00%
Total88100.00%2100.00%

/* * Routines for parsing the iBFT data to be human readable. */
static ssize_t ibft_attr_show_initiator(void *data, int type, char *buf) { struct ibft_kobject *entry = data; struct ibft_initiator *initiator = entry->initiator; void *ibft_loc = entry->header; char *str = buf; if (!initiator) return 0; switch (type) { case ISCSI_BOOT_INI_INDEX: str += sprintf(str, "%d\n", initiator->hdr.index); break; case ISCSI_BOOT_INI_FLAGS: str += sprintf(str, "%d\n", initiator->hdr.flags); break; case ISCSI_BOOT_INI_ISNS_SERVER: str += sprintf_ipaddr(str, initiator->isns_server); break; case ISCSI_BOOT_INI_SLP_SERVER: str += sprintf_ipaddr(str, initiator->slp_server); break; case ISCSI_BOOT_INI_PRI_RADIUS_SERVER: str += sprintf_ipaddr(str, initiator->pri_radius_server); break; case ISCSI_BOOT_INI_SEC_RADIUS_SERVER: str += sprintf_ipaddr(str, initiator->sec_radius_server); break; case ISCSI_BOOT_INI_INITIATOR_NAME: str += sprintf_string(str, initiator->initiator_name_len, (char *)ibft_loc + initiator->initiator_name_off); break; default: break; } return str - buf; }

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Konrad Rzeszutek Wilk17290.05%133.33%
Mike Christie189.42%133.33%
Adrian Bunk10.52%133.33%
Total191100.00%3100.00%


static ssize_t ibft_attr_show_nic(void *data, int type, char *buf) { struct ibft_kobject *entry = data; struct ibft_nic *nic = entry->nic; void *ibft_loc = entry->header; char *str = buf; __be32 val; if (!nic) return 0; switch (type) { case ISCSI_BOOT_ETH_INDEX: str += sprintf(str, "%d\n", nic->hdr.index); break; case ISCSI_BOOT_ETH_FLAGS: str += sprintf(str, "%d\n", nic->hdr.flags); break; case ISCSI_BOOT_ETH_IP_ADDR: str += sprintf_ipaddr(str, nic->ip_addr); break; case ISCSI_BOOT_ETH_SUBNET_MASK: val = cpu_to_be32(~((1 << (32-nic->subnet_mask_prefix))-1)); str += sprintf(str, "%pI4", &val); break; case ISCSI_BOOT_ETH_PREFIX_LEN: str += sprintf(str, "%d\n", nic->subnet_mask_prefix); break; case ISCSI_BOOT_ETH_ORIGIN: str += sprintf(str, "%d\n", nic->origin); break; case ISCSI_BOOT_ETH_GATEWAY: str += sprintf_ipaddr(str, nic->gateway); break; case ISCSI_BOOT_ETH_PRIMARY_DNS: str += sprintf_ipaddr(str, nic->primary_dns); break; case ISCSI_BOOT_ETH_SECONDARY_DNS: str += sprintf_ipaddr(str, nic->secondary_dns); break; case ISCSI_BOOT_ETH_DHCP: str += sprintf_ipaddr(str, nic->dhcp); break; case ISCSI_BOOT_ETH_VLAN: str += sprintf(str, "%d\n", nic->vlan); break; case ISCSI_BOOT_ETH_MAC: str += sprintf(str, "%pM\n", nic->mac); break; case ISCSI_BOOT_ETH_HOSTNAME: str += sprintf_string(str, nic->hostname_len, (char *)ibft_loc + nic->hostname_off); break; default: break; } return str - buf; }

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PersonTokensPropCommitsCommitProp
Konrad Rzeszutek Wilk26584.13%116.67%
Mike Christie237.30%116.67%
Hannes Reinecke175.40%116.67%
Joe Perches61.90%116.67%
H Hartley Sweeten30.95%116.67%
Adrian Bunk10.32%116.67%
Total315100.00%6100.00%

;
static ssize_t ibft_attr_show_target(void *data, int type, char *buf) { struct ibft_kobject *entry = data; struct ibft_tgt *tgt = entry->tgt; void *ibft_loc = entry->header; char *str = buf; int i; if (!tgt) return 0; switch (type) { case ISCSI_BOOT_TGT_INDEX: str += sprintf(str, "%d\n", tgt->hdr.index); break; case ISCSI_BOOT_TGT_FLAGS: str += sprintf(str, "%d\n", tgt->hdr.flags); break; case ISCSI_BOOT_TGT_IP_ADDR: str += sprintf_ipaddr(str, tgt->ip_addr); break; case ISCSI_BOOT_TGT_PORT: str += sprintf(str, "%d\n", tgt->port); break; case ISCSI_BOOT_TGT_LUN: for (i = 0; i < 8; i++) str += sprintf(str, "%x", (u8)tgt->lun[i]); str += sprintf(str, "\n"); break; case ISCSI_BOOT_TGT_NIC_ASSOC: str += sprintf(str, "%d\n", tgt->nic_assoc); break; case ISCSI_BOOT_TGT_CHAP_TYPE: str += sprintf(str, "%d\n", tgt->chap_type); break; case ISCSI_BOOT_TGT_NAME: str += sprintf_string(str, tgt->tgt_name_len, (char *)ibft_loc + tgt->tgt_name_off); break; case ISCSI_BOOT_TGT_CHAP_NAME: str += sprintf_string(str, tgt->chap_name_len, (char *)ibft_loc + tgt->chap_name_off); break; case ISCSI_BOOT_TGT_CHAP_SECRET: str += sprintf_string(str, tgt->chap_secret_len, (char *)ibft_loc + tgt->chap_secret_off); break; case ISCSI_BOOT_TGT_REV_CHAP_NAME: str += sprintf_string(str, tgt->rev_chap_name_len, (char *)ibft_loc + tgt->rev_chap_name_off); break; case ISCSI_BOOT_TGT_REV_CHAP_SECRET: str += sprintf_string(str, tgt->rev_chap_secret_len, (char *)ibft_loc + tgt->rev_chap_secret_off); break; default: break; } return str - buf; }

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Konrad Rzeszutek Wilk32193.04%133.33%
Mike Christie236.67%133.33%
Adrian Bunk10.29%133.33%
Total345100.00%3100.00%


static ssize_t ibft_attr_show_acpitbl(void *data, int type, char *buf) { struct ibft_kobject *entry = data; char *str = buf; switch (type) { case ISCSI_BOOT_ACPITBL_SIGNATURE: str += sprintf_string(str, ACPI_NAME_SIZE, entry->header->header.signature); break; case ISCSI_BOOT_ACPITBL_OEM_ID: str += sprintf_string(str, ACPI_OEM_ID_SIZE, entry->header->header.oem_id); break; case ISCSI_BOOT_ACPITBL_OEM_TABLE_ID: str += sprintf_string(str, ACPI_OEM_TABLE_ID_SIZE, entry->header->header.oem_table_id); break; default: break; } return str - buf; }

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David Bond106100.00%1100.00%
Total106100.00%1100.00%


static int __init ibft_check_device(void) { int len; u8 *pos; u8 csum = 0; len = ibft_addr->header.length; /* Sanity checking of iBFT. */ if (ibft_addr->header.revision != 1) { printk(KERN_ERR "iBFT module supports only revision 1, " \ "while this is %d.\n", ibft_addr->header.revision); return -ENOENT; } for (pos = (u8 *)ibft_addr; pos < (u8 *)ibft_addr + len; pos++) csum += *pos; if (csum) { printk(KERN_ERR "iBFT has incorrect checksum (0x%x)!\n", csum); return -ENOENT; } return 0; }

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Konrad Rzeszutek Wilk10394.50%150.00%
Peter Jones65.50%150.00%
Total109100.00%2100.00%

/* * Helper routiners to check to determine if the entry is valid * in the proper iBFT structure. */
static umode_t ibft_check_nic_for(void *data, int type) { struct ibft_kobject *entry = data; struct ibft_nic *nic = entry->nic; umode_t rc = 0; switch (type) { 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; }

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Mike Christie10353.93%120.00%
Konrad Rzeszutek Wilk7840.84%120.00%
Christopher Leech52.62%120.00%
Hannes Reinecke31.57%120.00%
Al Viro21.05%120.00%
Total191100.00%5100.00%


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; }

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Mike Christie7563.03%133.33%
Konrad Rzeszutek Wilk4235.29%133.33%
Al Viro21.68%133.33%
Total119100.00%3100.00%


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; }

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Mike Christie10071.94%125.00%
Konrad Rzeszutek Wilk3323.74%125.00%
Christopher Leech42.88%125.00%
Al Viro21.44%125.00%
Total139100.00%4100.00%


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; }

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David Bond44100.00%1100.00%
Total44100.00%1100.00%


static void ibft_kobj_release(void *data) { kfree(data); }

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Mike Christie15100.00%1100.00%
Total15100.00%1100.00%

/* * 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_bus_and_slot((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; }

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Mike Christie24459.37%266.67%
Konrad Rzeszutek Wilk16740.63%133.33%
Total411100.00%3100.00%

/* * 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; }

Contributors

PersonTokensPropCommitsCommitProp
Mike Christie15251.01%133.33%
David Bond8628.86%133.33%
Konrad Rzeszutek Wilk6020.13%133.33%
Total298100.00%3100.00%


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"); }; }

Contributors

PersonTokensPropCommitsCommitProp
Mike Christie4265.62%133.33%
Konrad Rzeszutek Wilk1828.12%133.33%
David Bond46.25%133.33%
Total64100.00%3100.00%


static void ibft_cleanup(void) { if (boot_kset) { ibft_unregister(); iscsi_boot_destroy_kset(boot_kset); } }

Contributors

PersonTokensPropCommitsCommitProp
Mike Christie1254.55%133.33%
Konrad Rzeszutek Wilk1045.45%266.67%
Total22100.00%3100.00%


static void __exit ibft_exit(void) { ibft_cleanup(); }

Contributors

PersonTokensPropCommitsCommitProp
Mike Christie1191.67%150.00%
Konrad Rzeszutek Wilk18.33%150.00%
Total12100.00%2100.00%

#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; } }

Contributors

PersonTokensPropCommitsCommitProp
Yinghai Lu69100.00%1100.00%
Total69100.00%1100.00%

#else
static void __init acpi_find_ibft_region(void) { }

Contributors

PersonTokensPropCommitsCommitProp
Yinghai Lu8100.00%1100.00%
Total8100.00%1100.00%

#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; }

Contributors

PersonTokensPropCommitsCommitProp
Konrad Rzeszutek Wilk6871.58%133.33%
Mike Christie1616.84%133.33%
Yinghai Lu1111.58%133.33%
Total95100.00%3100.00%

module_init(ibft_init); module_exit(ibft_exit);

Overall Contributors

PersonTokensPropCommitsCommitProp
Konrad Rzeszutek Wilk199759.61%211.76%
Mike Christie84925.34%211.76%
David Bond2407.16%15.88%
Yinghai Lu1173.49%15.88%
Christopher Leech842.51%15.88%
Hannes Reinecke200.60%15.88%
Peter Jones130.39%15.88%
Joe Perches80.24%211.76%
Vikas Chaudhary70.21%15.88%
Al Viro60.18%15.88%
H Hartley Sweeten30.09%15.88%
Harvey Harrison30.09%211.76%
Adrian Bunk30.09%15.88%
Total3350100.00%17100.00%
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