* [PATCH] Add iSCSI IBFT support (v0.4.3)
@ 2007-12-22 17:19 Konrad Rzeszutek
0 siblings, 0 replies; 2+ messages in thread
From: Konrad Rzeszutek @ 2007-12-22 17:19 UTC (permalink / raw)
To: linux-kernel
Cc: Greg KH, Doug Maxey, darnok, pjones, konradr, konradr,
randy.dunlap, hpa, lenb, mike.anderson, dwm, Arjan van de Ven
This patch (v0.4.3) adds /sysfs/firmware/ibft/[initiator|targetX|ethernetX|
extensionX] directories along with text properties which export the the iSCSI
Boot Firmware Table (iBFT) structure.
What is iSCSI Boot Firmware Table? It is a mechanism for the iSCSI
tools to extract from the machine NICs the iSCSI connection information
so that they can automagically mount the iSCSI share/target. Currently
the iSCSI information is hard-coded in the initrd.
For full details of the IBFT structure please take a look at:
ftp://ftp.software.ibm.com/systems/support/system_x_pdf/ibm_iscsi_boot_firmware_table_v1.02.pdf
Please note that this patch depends on the Greg KH patches tree
kobject changes.
Signed-off-by: Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
diff --git a/Documentation/ABI/testing/sysfs-ibft b/Documentation/ABI/testing/sysfs-ibft
new file mode 100644
index 0000000..4898740
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-ibft
@@ -0,0 +1,31 @@
+What: /sys/firmware/ibft/initiator
+Date: November 2007
+Contact: Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
+Description: The /sys/firmware/ibft/initiator directory will contain
+ files that expose the iSCSI Boot Firmware Table initiator data.
+ Usually this contains the Initiator name.
+
+What: /sys/firmware/ibft/targetX
+Date: November 2007
+Contact: Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
+Description: The /sys/firmware/ibft/targetX directory will contain
+ files that expose the iSCSI Boot Firmware Table target data.
+ Usually this contains the target's IP address, boot LUN,
+ target name, and what NIC it is associated with. It can also
+ contain the CHAP name (and password), the reverse CHAP
+ name (and password)
+
+What: /sys/firmware/ibft/ethernetX
+Date: November 2007
+Contact: Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
+Description: The /sys/firmware/ibft/ethernetX directory will contain
+ files that expose the iSCSI Boot Firmware Table NIC data.
+ This can this can the IP address, MAC, and gateway of the NIC.
+
+What: /sys/firmware/ibft/extensionX
+Date: November 2007
+Contact: Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
+Description: The /sys/firmware/ibft/extensionX directory will contain
+ files that expose the iSCSI Boot Firmware Table extension data.
+ The extended data structure is not supported so there would be
+ no files in this directory.
diff --git a/arch/x86/kernel/setup_32.c b/arch/x86/kernel/setup_32.c
index e1e18c3..32900df 100644
--- a/arch/x86/kernel/setup_32.c
+++ b/arch/x86/kernel/setup_32.c
@@ -39,6 +39,7 @@ #include <linux/module.h>
#include <linux/efi.h>
#include <linux/init.h>
#include <linux/edd.h>
+#include <linux/iscsi_ibft.h>
#include <linux/nodemask.h>
#include <linux/kexec.h>
#include <linux/crash_dump.h>
@@ -148,6 +149,20 @@ static inline void copy_edd(void)
}
#endif
+#if defined(CONFIG_ISCSI_IBFT_FIND)
+static void __init reserve_ibft_region(void)
+{
+ unsigned int ibft_len;
+
+ ibft_len = find_ibft();
+ if (ibft_len)
+ reserve_bootmem((unsigned int)ibft_phys,
+ PAGE_ALIGN(ibft_len));
+}
+#else
+static void __init reserve_ibft_region(void) { }
+#endif
+
int __initdata user_defined_memmap = 0;
/*
@@ -496,6 +511,8 @@ #ifdef CONFIG_BLK_DEV_INITRD
}
#endif
reserve_crashkernel();
+
+ reserve_ibft_region();
}
/*
diff --git a/arch/x86/kernel/setup_64.c b/arch/x86/kernel/setup_64.c
index 30d94d1..307fb99 100644
--- a/arch/x86/kernel/setup_64.c
+++ b/arch/x86/kernel/setup_64.c
@@ -33,6 +33,7 @@ #include <linux/pci.h>
#include <linux/acpi.h>
#include <linux/kallsyms.h>
#include <linux/edd.h>
+#include <linux/iscsi_ibft.h>
#include <linux/mmzone.h>
#include <linux/kexec.h>
#include <linux/cpufreq.h>
@@ -198,6 +199,20 @@ static inline void copy_edd(void)
}
#endif
+#if defined(CONFIG_ISCSI_IBFT_FIND)
+static void __init reserve_ibft_region(void)
+{
+ unsigned int ibft_len;
+
+ ibft_len = find_ibft();
+ if (ibft_len)
+ reserve_bootmem_generic((unsigned long)ibft_phys,
+ PAGE_ALIGN(ibft_len));
+}
+#else
+static void __init reserve_ibft_region(void) { }
+#endif
+
#ifdef CONFIG_KEXEC
static void __init reserve_crashkernel(void)
{
@@ -403,6 +418,9 @@ #ifdef CONFIG_BLK_DEV_INITRD
}
#endif
reserve_crashkernel();
+
+ reserve_ibft_region();
+
paging_init();
#ifdef CONFIG_PCI
diff --git a/drivers/firmware/Kconfig b/drivers/firmware/Kconfig
index 05f02a3..e2f7208 100644
--- a/drivers/firmware/Kconfig
+++ b/drivers/firmware/Kconfig
@@ -93,4 +93,23 @@ config DMIID
information from userspace through /sys/class/dmi/id/ or if you want
DMI-based module auto-loading.
+config ISCSI_IBFT_FIND
+ bool "iSCSI Boot Firmware Table Attributes"
+ default n
+ help
+ This option enables the kernel to find the region of memory
+ in which the ISCSI Boot Firmware Table (iBFT) resides. This
+ is necessary for iSCSI Boot Firmware Table Attributes module to work
+ properly.
+
+config ISCSI_IBFT
+ tristate "iSCSI Boot Firmware Table Attributes module"
+ depends on ISCSI_IBFT_FIND
+ default n
+ help
+ This option enables support for detection and exposing of iSCSI
+ Boot Firmware Table (iBFT) via sysfs to userspace. If you wish to
+ detect iSCSI boot parameters dynamically during system boot, say Y.
+ Otherwise, say N.
+
endmenu
diff --git a/drivers/firmware/Makefile b/drivers/firmware/Makefile
index 8d4ebc8..4c91471 100644
--- a/drivers/firmware/Makefile
+++ b/drivers/firmware/Makefile
@@ -8,3 +8,5 @@ obj-$(CONFIG_EFI_PCDP) += pcdp.o
obj-$(CONFIG_DELL_RBU) += dell_rbu.o
obj-$(CONFIG_DCDBAS) += dcdbas.o
obj-$(CONFIG_DMIID) += dmi-id.o
+obj-$(CONFIG_ISCSI_IBFT_FIND) += iscsi_ibft_find.o
+obj-$(CONFIG_ISCSI_IBFT) += iscsi_ibft.o
diff --git a/drivers/firmware/iscsi_ibft.c b/drivers/firmware/iscsi_ibft.c
new file mode 100644
index 0000000..90cb9de
--- /dev/null
+++ b/drivers/firmware/iscsi_ibft.c
@@ -0,0 +1,927 @@
+/*
+ * Copyright 2007 Red Hat, Inc.
+ * by Peter Jones <pjones@redhat.com>
+ * Copyright 2007 IBM, Inc.
+ * by Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
+ *
+ * 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:
+ *
+ * 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/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>
+
+#define IBFT_ISCSI_VERSION "0.4.3"
+#define IBFT_ISCSI_DATE "2007-Dec-21"
+
+MODULE_AUTHOR("Peter Jones <pjones@redhat.com> and \
+Konrad Rzeszutek <konradr@us.ibm.com>");
+MODULE_DESCRIPTION("sysfs interface to BIOS iBFT information");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(IBFT_ISCSI_VERSION);
+
+
+struct ibft_table_header {
+ char signature[4];
+ u32 length;
+ u8 revision;
+ u8 checksum;
+ char oem_id[6];
+ char oem_table_id[8];
+ char reserved[24];
+} __attribute__((__packed__));
+
+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, /* Should never show up */
+ id_control = 1, /* Ditto */
+ id_initiator = 2,
+ id_nic = 3,
+ id_target = 4,
+ id_extensions, /* We don't support. */
+};
+
+static const char *ibft_id_names[] =
+ {"reserved", "control", "initiator", "ethernet%d",
+ "target%d", "extension%d", NULL};
+
+/*
+ * The text attributes names for each of the kobjects.
+*/
+enum ibft_eth_properties_enum {
+ ibft_eth_index,
+ ibft_eth_flags,
+ ibft_eth_ip_addr,
+ ibft_eth_subnet_mask,
+ ibft_eth_origin,
+ ibft_eth_gateway,
+ ibft_eth_primary_dns,
+ ibft_eth_secondary_dns,
+ ibft_eth_dhcp,
+ ibft_eth_vlan,
+ ibft_eth_mac,
+ /* ibft_eth_pci_bdf - this is replaced by link to the device itself. */
+ ibft_eth_hostname,
+ ibft_eth_end_marker,
+};
+
+static const char *ibft_eth_properties[] =
+ {"index", "flags", "ip-addr", "subnet-mask", "origin", "gateway",
+ "primary-dns", "secondary-dns", "dhcp", "vlan", "mac", "hostname",
+ NULL};
+
+enum ibft_tgt_properties_enum {
+ ibft_tgt_index,
+ ibft_tgt_flags,
+ ibft_tgt_ip_addr,
+ ibft_tgt_port,
+ ibft_tgt_lun,
+ ibft_tgt_chap_type,
+ ibft_tgt_nic_assoc,
+ ibft_tgt_name,
+ ibft_tgt_chap_name,
+ ibft_tgt_chap_secret,
+ ibft_tgt_rev_chap_name,
+ ibft_tgt_rev_chap_secret,
+ ibft_tgt_end_marker,
+};
+
+static const char *ibft_tgt_properties[] =
+ {"index", "flags", "ip-addr", "port", "lun", "chap-type", "nic-assoc",
+ "target-name", "chap-name", "chap-secret", "rev-chap-name",
+ "rev-chap-name-secret", NULL};
+
+enum ibft_initiator_properties_enum {
+ ibft_init_index,
+ ibft_init_flags,
+ ibft_init_isns_server,
+ ibft_init_slp_server,
+ ibft_init_pri_radius_server,
+ ibft_init_sec_radius_server,
+ ibft_init_initiator_name,
+ ibft_init_end_marker,
+};
+
+static const char *ibft_initiator_properties[] =
+ {"index", "flags", "isns-server", "slp-server", "pri-radius-server",
+ "sec-radius-server", "initiator-name", NULL};
+
+/*
+ * The kobject and attribute structures.
+ */
+
+struct ibft_kobject {
+ struct ibft_table_header *header;
+ union {
+ struct ibft_initiator *initiator;
+ struct ibft_nic *nic;
+ struct ibft_tgt *tgt;
+ struct ibft_hdr *hdr;
+ };
+ struct kobject kobj;
+ struct list_head node;
+};
+
+struct ibft_attribute {
+ struct attribute attr;
+ ssize_t (*show) (struct ibft_kobject *entry,
+ struct ibft_attribute *attr, char *buf);
+ union {
+ struct ibft_initiator *initiator;
+ struct ibft_nic *nic;
+ struct ibft_tgt *tgt;
+ struct ibft_hdr *hdr;
+ };
+ struct kobject *kobj;
+ int type; /* The enum of the type. This can be any value off:
+ ibft_eth_properties_enum, ibft_tgt_properties_enum,
+ or ibft_initiator_properties_enum. */
+ struct list_head node;
+};
+
+static LIST_HEAD(ibft_attr_list);
+static LIST_HEAD(ibft_kobject_list);
+
+static const char nulls[16];
+static struct ibft_table_header *ibft_device;
+
+/*
+ * Helper functions to parse data properly.
+ */
+static ssize_t sprintf_ipaddr(char *buf, u8 *ip)
+{
+ 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
+ */
+ return sprintf(buf, "%d.%d.%d.%d\n", ip[12],
+ ip[13], ip[14], ip[15]);
+ } else
+ return 0;
+}
+
+static ssize_t sprintf_string(char *str, int len, char *buf)
+{
+ return sprintf(str, "%.*s\n", len, buf);
+}
+
+/*
+ * Helper function to verify the IBFT header.
+ */
+static int ibft_verify_hdr(struct ibft_hdr *hdr, int id, int length)
+{
+#define IBFT_VERIFY_HDR_FIELD(val, name) \
+ if (hdr->val != val) { \
+ printk(KERN_ERR \
+ "error, in IBFT structure (%s) expected %d but" \
+ " found %d\n", \
+ name, val, hdr->val); \
+ return -ENODEV; \
+ }
+ IBFT_VERIFY_HDR_FIELD(id, "ID");
+ IBFT_VERIFY_HDR_FIELD(length, "Length");
+ return 0;
+}
+
+static void ibft_release(struct kobject *kobj)
+{
+ struct ibft_kobject *ibft =
+ container_of(kobj, struct ibft_kobject, kobj);
+ kfree(ibft);
+}
+
+/*
+ * Routines for reading of the iBFT data in a human readable fashion.
+ */
+ssize_t ibft_attr_show_initiator(struct ibft_kobject *entry,
+ struct ibft_attribute *attr,
+ char *buf)
+{
+ struct ibft_initiator *initiator = entry->initiator;
+ void *ibft_loc = entry->header;
+ char *str = buf;
+
+ if (!initiator)
+ return 0;
+
+ switch (attr->type) {
+ case ibft_init_index:
+ str += sprintf(str, "%d\n", initiator->hdr.index);
+ break;
+ case ibft_init_flags:
+ str += sprintf(str, "%d\n", initiator->hdr.flags);
+ break;
+ case ibft_init_isns_server:
+ str += sprintf_ipaddr(str, initiator->isns_server);
+ break;
+ case ibft_init_slp_server:
+ str += sprintf_ipaddr(str, initiator->slp_server);
+ break;
+ case ibft_init_pri_radius_server:
+ str += sprintf_ipaddr(str, initiator->pri_radius_server);
+ break;
+ case ibft_init_sec_radius_server:
+ str += sprintf_ipaddr(str, initiator->sec_radius_server);
+ break;
+ case ibft_init_initiator_name:
+ str += sprintf_string(str, initiator->initiator_name_len,
+ (char *)ibft_loc +
+ initiator->initiator_name_off);
+ break;
+ default:
+ break;
+ }
+
+ return str - buf;
+}
+
+ssize_t ibft_attr_show_nic(struct ibft_kobject *entry,
+ struct ibft_attribute *attr,
+ char *buf)
+{
+ struct ibft_nic *nic = entry->nic;
+ void *ibft_loc = entry->header;
+ char *str = buf;
+ char *mac;
+ int val;
+
+ if (!nic)
+ return 0;
+
+ switch (attr->type) {
+ case ibft_eth_index:
+ str += sprintf(str, "%d\n", nic->hdr.index);
+ break;
+ case ibft_eth_flags:
+ str += sprintf(str, "%d\n", nic->hdr.flags);
+ break;
+ case ibft_eth_ip_addr:
+ str += sprintf_ipaddr(str, nic->ip_addr);
+ break;
+ case ibft_eth_subnet_mask:
+ val = ~((1 << (32-nic->subnet_mask_prefix))-1);
+ str += sprintf(str, "%d.%d.%d.%d\n",
+ (u8)(val >> 24), (u8)(val >> 16),
+ (u8)(val >> 8), (u8)(val));
+ break;
+ case ibft_eth_origin:
+ str += sprintf(str, "%d\n", nic->origin);
+ break;
+ case ibft_eth_gateway:
+ str += sprintf_ipaddr(str, nic->gateway);
+ break;
+ case ibft_eth_primary_dns:
+ str += sprintf_ipaddr(str, nic->primary_dns);
+ break;
+ case ibft_eth_secondary_dns:
+ str += sprintf_ipaddr(str, nic->secondary_dns);
+ break;
+ case ibft_eth_dhcp:
+ str += sprintf_ipaddr(str, nic->dhcp);
+ break;
+ case ibft_eth_vlan:
+ str += sprintf(str, "%d\n", nic->vlan);
+ break;
+ case ibft_eth_mac:
+ mac = nic->mac;
+ str += sprintf(str, "%02x:%02x:%02x:%02x:%02x:%02x\n",
+ (u8)mac[0], (u8)mac[1], (u8)mac[2],
+ (u8)mac[3], (u8)mac[4], (u8)mac[5]);
+ break;
+ case ibft_eth_hostname:
+ str += sprintf_string(str, nic->hostname_len,
+ (char *)ibft_loc + nic->hostname_off);
+ break;
+ default:
+ break;
+ }
+
+ return str - buf;
+};
+
+ssize_t ibft_attr_show_target(struct ibft_kobject *entry,
+ struct ibft_attribute *attr,
+ char *buf)
+{
+ struct ibft_tgt *tgt = entry->tgt;
+ void *ibft_loc = entry->header;
+ char *str = buf;
+ int i;
+
+ if (!tgt)
+ return 0;
+
+ switch (attr->type) {
+ case ibft_tgt_index:
+ str += sprintf(str, "%d\n", tgt->hdr.index);
+ break;
+ case ibft_tgt_flags:
+ str += sprintf(str, "%d\n", tgt->hdr.flags);
+ break;
+ case ibft_tgt_ip_addr:
+ str += sprintf_ipaddr(str, tgt->ip_addr);
+ break;
+ case ibft_tgt_port:
+ str += sprintf(str, "%d\n", tgt->port);
+ break;
+ case ibft_tgt_lun:
+ for (i = 0; i < 8; i++)
+ str += sprintf(str, "%x", (u8)tgt->lun[i]);
+ str += sprintf(str, "\n");
+ break;
+ case ibft_tgt_nic_assoc:
+ str += sprintf(str, "%d\n", tgt->nic_assoc);
+ break;
+ case ibft_tgt_chap_type:
+ str += sprintf(str, "%d\n", tgt->chap_type);
+ break;
+ case ibft_tgt_name:
+ str += sprintf_string(str, tgt->tgt_name_len,
+ (char *)ibft_loc + tgt->tgt_name_off);
+ break;
+ case ibft_tgt_chap_name:
+ str += sprintf_string(str, tgt->chap_name_len,
+ (char *)ibft_loc + tgt->chap_name_off);
+ break;
+ case ibft_tgt_chap_secret:
+ str += sprintf_string(str, tgt->chap_secret_len,
+ (char *)ibft_loc + tgt->chap_secret_off);
+ break;
+ case ibft_tgt_rev_chap_name:
+ str += sprintf_string(str, tgt->rev_chap_name_len,
+ (char *)ibft_loc +
+ tgt->rev_chap_name_off);
+ break;
+ case ibft_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;
+}
+
+/*
+ * The main routine which allows the user to read the IBFT data.
+ */
+static ssize_t ibft_show_attribute(struct kobject *kobj,
+ struct attribute *attr,
+ char *buf)
+{
+ struct ibft_kobject *dev =
+ container_of(kobj, struct ibft_kobject, kobj);
+ struct ibft_attribute *ibft_attr =
+ container_of(attr, struct ibft_attribute, attr);
+ ssize_t ret = -EIO;
+ char *str = buf;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EACCES;
+
+ if (ibft_attr->show)
+ ret = ibft_attr->show(dev, ibft_attr, str);
+
+ return ret;
+}
+
+static struct sysfs_ops ibft_attr_ops = {
+ .show = ibft_show_attribute,
+};
+
+static struct kobj_type ibft_ktype = {
+ .release = ibft_release,
+ .sysfs_ops = &ibft_attr_ops,
+};
+
+static struct kset *ibft_kset;
+
+static int ibft_alloc_device(void *idev)
+{
+ int len;
+ struct ibft_table_header *hdr;
+
+ if (!idev)
+ return -ENOENT;
+
+ hdr = (struct ibft_table_header *)
+ phys_to_virt((unsigned long)ibft_phys);
+ len = hdr->length;
+
+ ibft_device = kmalloc(len, GFP_KERNEL);
+ if (!ibft_device)
+ return -ENOMEM;
+
+ memcpy(ibft_device, hdr, len);
+
+ return 0;
+}
+
+static void ibft_free_device(struct ibft_table_header *hdr)
+{
+ kfree(hdr);
+}
+
+/*
+ * Helper function for ibft_register_kobjects.
+ */
+static int ibft_create_kobject(struct ibft_table_header *header,
+ struct ibft_hdr *hdr,
+ struct list_head *list)
+{
+ 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(hdr, id_initiator,
+ sizeof(*ibft_kobj->initiator));
+ break;
+ case id_nic:
+ rc = ibft_verify_hdr(hdr, id_nic,
+ sizeof(*ibft_kobj->nic));
+ break;
+ case id_target:
+ rc = ibft_verify_hdr(hdr, id_target,
+ sizeof(*ibft_kobj->tgt));
+ break;
+ default:
+ /* Extension field which we don't support. Ignore it */
+ break;
+ }
+
+ if (rc) {
+ kfree(ibft_kobj);
+ goto out;
+ }
+
+ /* kobject fief. We will let the reference counter do the job
+ of deleting its name if we fail here. */
+ ibft_kobj->kobj.kset = ibft_kset;
+
+ rc = kobject_init_and_add(&ibft_kobj->kobj, &ibft_ktype,
+ NULL, ibft_id_names[hdr->id], hdr->index);
+
+ if (rc) {
+ kfree(ibft_kobj);
+ goto out;
+ }
+
+ kobject_uevent(&ibft_kobj->kobj, KOBJ_ADD);
+
+ if (hdr->id == id_nic) {
+ pci_dev = pci_get_bus_and_slot((nic->pci_bdf & 0xff00) >> 8,
+ (nic->pci_bdf & 0xff));
+ if (pci_dev) {
+ rc = sysfs_create_link(&ibft_kobj->kobj,
+ &pci_dev->dev.kobj, "device");
+ pci_dev_put(pci_dev);
+ }
+ }
+
+ /* Nothing broke so lets add it to the list. */
+ list_add_tail(&ibft_kobj->node, list);
+out:
+ return rc;
+}
+
+/*
+ * Scan the IBFT table structure for the NIC and Target fields. When
+ * found add them on the passed-in list.
+ */
+static int ibft_register_kobjects(struct ibft_table_header *header,
+ struct list_head *list)
+{
+ struct ibft_control *control = NULL;
+ void *ptr, *end;
+ int rc = 0;
+ u16 offset;
+
+ control = (void *)header + sizeof(*header);
+ end = (void *)control + control->hdr.length;
+
+ for (ptr = &control->initiator_off; ptr < end; ptr += sizeof(u16)) {
+ offset = *(u16 *)ptr;
+ if (offset && offset < header->length) {
+ rc = ibft_create_kobject(header,
+ (void *)header + offset,
+ list);
+ if (rc)
+ break;
+ }
+ }
+
+ return rc;
+}
+
+static void ibft_unregister(struct list_head *attr_list,
+ struct list_head *kobj_list)
+{
+ struct ibft_kobject *data = NULL, *n;
+ struct ibft_attribute *attr = NULL, *m;
+
+ list_for_each_entry_safe(attr, m, attr_list, node) {
+ sysfs_remove_file(attr->kobj, &attr->attr);
+ list_del(&attr->node);
+ kfree(attr);
+ };
+ list_del_init(attr_list);
+
+ list_for_each_entry_safe(data, n, kobj_list, node) {
+ list_del(&data->node);
+ if (data->hdr->id == id_nic)
+ sysfs_remove_link(&data->kobj, "device");
+ kobject_unregister(&data->kobj);
+ };
+ list_del_init(kobj_list);
+}
+
+static int ibft_create_attribute(struct ibft_kobject *kobj_data,
+ int type,
+ const char *name,
+ ssize_t (*show) (struct ibft_kobject *entry,
+ struct ibft_attribute *attr,
+ char *buf),
+ struct list_head *list)
+{
+ struct ibft_attribute *attr = NULL;
+ struct ibft_hdr *hdr = kobj_data->hdr;
+
+ attr = kmalloc(sizeof(*attr), GFP_KERNEL);
+ if (!attr)
+ return -ENOMEM;
+
+ attr->attr.name = name;
+ attr->attr.mode = S_IRUSR;
+ attr->attr.owner = THIS_MODULE;
+
+ attr->hdr = hdr;
+ attr->show = show;
+ attr->kobj = &kobj_data->kobj;
+ attr->type = type;
+
+ list_add_tail(&attr->node, list);
+
+ return 0;
+}
+
+static int ibft_check_nic_for(struct ibft_nic *nic, int entry)
+{
+ int rc = 0;
+
+ switch (entry) {
+ case ibft_eth_index:
+ case ibft_eth_flags:
+ rc = 1;
+ break;
+ case ibft_eth_ip_addr:
+ if (!memcmp(nic->dhcp, nulls, sizeof(nic->dhcp)))
+ rc = 1;
+ break;
+ case ibft_eth_subnet_mask:
+ if (!memcmp(nic->dhcp, nulls, sizeof(nic->dhcp)))
+ rc = 1;
+ break;
+ case ibft_eth_origin:
+ rc = 1;
+ break;
+ case ibft_eth_gateway:
+ if (memcmp(nic->gateway, nulls, sizeof(nic->gateway)))
+ rc = 1;
+ break;
+ case ibft_eth_primary_dns:
+ if (memcmp(nic->primary_dns, nulls,
+ sizeof(nic->primary_dns)))
+ rc = 1;
+ break;
+ case ibft_eth_secondary_dns:
+ if (memcmp(nic->secondary_dns, nulls,
+ sizeof(nic->secondary_dns)))
+ rc = 1;
+ break;
+ case ibft_eth_dhcp:
+ if (memcmp(nic->dhcp, nulls, sizeof(nic->dhcp)))
+ rc = 1;
+ break;
+ case ibft_eth_vlan:
+ case ibft_eth_mac:
+ rc = 1;
+ break;
+ case ibft_eth_hostname:
+ if (nic->hostname_off)
+ rc = 1;
+ break;
+ default:
+ break;
+ }
+
+ return rc;
+}
+
+static int ibft_check_tgt_for(struct ibft_tgt *tgt, int entry)
+{
+ int rc = 0;
+
+ switch (entry) {
+ case ibft_tgt_index:
+ case ibft_tgt_flags:
+ case ibft_tgt_ip_addr:
+ case ibft_tgt_port:
+ case ibft_tgt_lun:
+ case ibft_tgt_nic_assoc:
+ case ibft_tgt_chap_type:
+ rc = 1;
+ case ibft_tgt_name:
+ if (tgt->tgt_name_len)
+ rc = 1;
+ break;
+ case ibft_tgt_chap_name:
+ case ibft_tgt_chap_secret:
+ if (tgt->chap_name_len)
+ rc = 1;
+ break;
+ case ibft_tgt_rev_chap_name:
+ case ibft_tgt_rev_chap_secret:
+ if (tgt->rev_chap_name_len)
+ rc = 1;
+ break;
+ default:
+ break;
+ }
+
+ return rc;
+}
+
+static int ibft_check_initiator_for(struct ibft_initiator *init, int entry)
+{
+ int rc = 0;
+
+ switch (entry) {
+ case ibft_init_index:
+ case ibft_init_flags:
+ rc = 1;
+ break;
+ case ibft_init_isns_server:
+ if (memcmp(init->isns_server, nulls,
+ sizeof(init->isns_server)))
+ rc = 1;
+ break;
+ case ibft_init_slp_server:
+ if (memcmp(init->slp_server, nulls,
+ sizeof(init->slp_server)))
+ rc = 1;
+ break;
+ case ibft_init_pri_radius_server:
+ if (memcmp(init->pri_radius_server, nulls,
+ sizeof(init->pri_radius_server)))
+ rc = 1;
+ break;
+ case ibft_init_sec_radius_server:
+ if (memcmp(init->sec_radius_server, nulls,
+ sizeof(init->sec_radius_server)))
+ rc = 1;
+ break;
+ case ibft_init_initiator_name:
+ if (init->initiator_name_len)
+ rc = 1;
+ break;
+ default:
+ break;
+ }
+
+ return rc;
+}
+
+/*
+ * Register the attributes for all of the kobjects.
+ */
+static int ibft_register_attributes(struct list_head *kobject_list,
+ struct list_head *attr_list)
+{
+ int rc = 0, i = 0;
+ struct ibft_kobject *data = NULL;
+ struct ibft_attribute *attr = NULL, *m;
+
+ list_for_each_entry(data, kobject_list, node) {
+ switch (data->hdr->id) {
+ case id_nic:
+ for (i = 0; i < ibft_eth_end_marker && !rc; i++)
+ if (ibft_check_nic_for(data->nic, i))
+ rc = ibft_create_attribute(data, i,
+ ibft_eth_properties[i],
+ ibft_attr_show_nic, attr_list);
+ break;
+ case id_target:
+ for (i = 0; i < ibft_tgt_end_marker && !rc; i++)
+ if (ibft_check_tgt_for(data->tgt, i))
+ rc = ibft_create_attribute(data, i,
+ ibft_tgt_properties[i],
+ ibft_attr_show_target,
+ attr_list);
+ break;
+ case id_initiator:
+ for (i = 0; i < ibft_init_end_marker && !rc; i++)
+ if (ibft_check_initiator_for(
+ data->initiator, i))
+ rc = ibft_create_attribute(data, i,
+ ibft_initiator_properties[i],
+ ibft_attr_show_initiator,
+ attr_list);
+ break;
+ default:
+ break;
+ }
+ if (rc)
+ break;
+ }
+ list_for_each_entry_safe(attr, m, attr_list, node) {
+ rc = sysfs_create_file(attr->kobj, &attr->attr);
+ if (rc) {
+ list_del(&attr->node);
+ kfree(attr);
+ break;
+ }
+ }
+
+ return rc;
+}
+
+/*
+ * ibft_init() - creates sysfs tree entries for iBFT data.
+ */
+static int __init ibft_init(void)
+{
+ int rc = 0;
+
+ if (!ibft_phys)
+ find_ibft();
+
+ ibft_kset = kset_create_and_add("ibft", NULL, firmware_kobj);
+ if (!ibft_kset)
+ return -ENOMEM;
+
+ if (ibft_phys) {
+ printk(KERN_INFO "iBFT detected at 0x%p.\n", ibft_phys);
+
+ rc = ibft_alloc_device(ibft_phys);
+ if (rc)
+ goto out_firmware_unregister;
+
+ /* Scan the IBFT for data and register kobjects. */
+ rc = ibft_register_kobjects(ibft_device, &ibft_kobject_list);
+ if (rc)
+ goto out_free;
+
+ /* Register the attributes */
+ rc = ibft_register_attributes(&ibft_kobject_list,
+ &ibft_attr_list);
+ if (rc)
+ goto out_free;
+ } else
+ printk(KERN_INFO "No iBFT detected.\n");
+
+ return 0;
+
+out_free:
+ ibft_unregister(&ibft_attr_list, &ibft_kobject_list);
+ ibft_free_device(ibft_device);
+out_firmware_unregister:
+ kset_unregister(ibft_kset);
+ return rc;
+}
+
+static void __exit ibft_exit(void)
+{
+ ibft_unregister(&ibft_attr_list, &ibft_kobject_list);
+ ibft_free_device(ibft_device);
+ kset_unregister(ibft_kset);
+}
+
+module_init(ibft_init);
+module_exit(ibft_exit);
diff --git a/drivers/firmware/iscsi_ibft_find.c b/drivers/firmware/iscsi_ibft_find.c
new file mode 100644
index 0000000..d40cc25
--- /dev/null
+++ b/drivers/firmware/iscsi_ibft_find.c
@@ -0,0 +1,77 @@
+/*
+ * Copyright 2007 Red Hat, Inc.
+ * by Peter Jones <pjones@redhat.com>
+ * Copyright 2007 IBM, Inc.
+ * by Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
+ *
+ * This code finds the iSCSI Boot Format Table.
+ *
+ * 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.
+ */
+
+#include <linux/blkdev.h>
+#include <linux/ctype.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/init.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>
+
+
+/*
+ * Physical location of iSCSI Boot Format Table.
+ */
+void *ibft_phys;
+EXPORT_SYMBOL(ibft_phys);
+
+#define IBFT_SIGN "iBFT"
+#define IBFT_SIGN_LEN 4
+#define IBFT_START 0x80000 /* 512kB */
+#define IBFT_END 0x100000 /* 1MB */
+#define VGA_MEM 0xA0000 /* VGA buffer */
+#define VGA_SIZE 0x20000 /* 128kB */
+
+
+/*
+ * Routine used to find the iSCSI Boot Format Table. the physical
+ * location is set in the ibft_phys variable. The return value is
+ * the size of IBFT.
+ */
+ssize_t find_ibft(void)
+{
+ unsigned long pos;
+
+ for (pos = IBFT_START; pos < IBFT_END; pos += 16) {
+ void *virt;
+ /* The table can't be inside the VGA BIOS reserved space,
+ * so skip that area */
+ if (pos == VGA_MEM)
+ pos += VGA_SIZE;
+ virt = phys_to_virt(pos);
+ if (memcmp(virt, IBFT_SIGN, IBFT_SIGN_LEN) == 0) {
+ unsigned long *addr =
+ (unsigned long *)phys_to_virt(pos + 4);
+ unsigned int len = *addr;
+ /* if the length of the table extends past 1M,
+ * the table cannot be valid. */
+ if (pos + len <= (IBFT_END-1)) {
+ ibft_phys = (void *)pos;
+ return len;
+ }
+ }
+ }
+ return 0;
+}
+EXPORT_SYMBOL(find_ibft);
diff --git a/drivers/scsi/libsas/sas_ata.c b/drivers/scsi/libsas/sas_ata.c
diff --git a/include/linux/iscsi_ibft.h b/include/linux/iscsi_ibft.h
new file mode 100644
index 0000000..d36ca16
--- /dev/null
+++ b/include/linux/iscsi_ibft.h
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2007 Red Hat, Inc.
+ * by Peter Jones <pjones@redhat.com>
+ * Copyright 2007 IBM, Inc.
+ * by Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
+ *
+ * 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.
+ */
+
+#ifndef ISCSI_IBFT_H
+#define ISCSI_IBFT_H
+
+#if defined(CONFIG_ISCSI_IBFT_FIND)
+
+/*
+ * Physical location of iSCSI Boot Format Table.
+ */
+extern void *ibft_phys;
+
+/*
+ * Routine used to find the iSCSI Boot Format Table. The physical
+ * location is set in the ibft_phys variable. The return value is the
+ * size of IBFT.
+ */
+extern ssize_t find_ibft(void);
+
+#endif
+
+#endif /* ISCSI_IBFT_H */
^ permalink raw reply [flat|nested] 2+ messages in thread* [REPOST PATCH] Add iSCSI IBFT support (v0.4)
@ 2007-11-28 23:34 Konrad Rzeszutek
2007-12-05 0:44 ` darnok
0 siblings, 1 reply; 2+ messages in thread
From: Konrad Rzeszutek @ 2007-11-28 23:34 UTC (permalink / raw)
To: linux-kernel
Cc: pjones, konradr, konradr, greg, randy.dunlap, hpa, lenb,
mike.anderson, dwm
This patch adds /sysfs/firmware/ibft/[initiator|targetX|ethernetX]
directories along with text properties which export the the iSCSI Boot
Firmware Table (iBFT) structure.
What is iSCSI Boot Firmware Table? It is a mechanism for the iSCSI
tools to extract from the machine NICs the iSCSI connection information
so that they can automagically mount the iSCSI share/target. Currently
the iSCSI information is hard-coded in the initrd.
For full details of the IBFT structure please take a look at:
ftp://ftp.software.ibm.com/systems/support/system_x_pdf/ibm_iscsi_boot_firmware_table_v1.02.pdf
Signed-off-by: Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
Signed-off-by: Peter Jones <pjones@redhat.com>
diff --git a/Documentation/ABI/testing/sysfs-ibft b/Documentation/ABI/testing/sysfs-ibft
new file mode 100644
index 0000000..941ad9f
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-ibft
@@ -0,0 +1,31 @@
+What: /sys/firmware/ibft/initiator
+Date: November 2007
+Contact: Konrad Rzeszutek <konradr@us.ibm.com>
+Description: The /sys/firmware/ibft/initiator directory will contain
+ files that expose the iSCSI Boot Firmware Table initiator data.
+ Usually this contains the Initiator name.
+
+What: /sys/firmware/ibft/targetX
+Date: November 2007
+Contact: Konrad Rzeszutek <konradr@us.ibm.com>
+Description: The /sys/firmware/ibft/targetX directory will contain
+ files that expose the iSCSI Boot Firmware Table target data.
+ Usually this contains the target's IP address, boot LUN,
+ target name, and what NIC it is associated with. It can also
+ contain the CHAP name (and password), the reverse CHAP
+ name (and password)
+
+What: /sys/firmware/ibft/ethernetX
+Date: November 2007
+Contact: Konrad Rzeszutek <konradr@us.ibm.com>
+Description: The /sys/firmware/ibft/ethernetX directory will contain
+ files that expose the iSCSI Boot Firmware Table NIC data.
+ This can this can the IP address, MAC, and gateway of the NIC.
+
+What: /sys/firmware/ibft/extensionX
+Date: November 2007
+Contact: Konrad Rzeszutek <konradr@us.ibm.com>
+Description: The /sys/firmware/ibft/extensionX directory will contain
+ files that expose the iSCSI Boot Firmware Table extension data.
+ The extended data structure is not supported so there would be
+ no files in this directory.
diff --git a/arch/x86/kernel/setup_32.c b/arch/x86/kernel/setup_32.c
index e1e18c3..7c36a28 100644
--- a/arch/x86/kernel/setup_32.c
+++ b/arch/x86/kernel/setup_32.c
@@ -39,6 +39,7 @@ #include <linux/module.h>
#include <linux/efi.h>
#include <linux/init.h>
#include <linux/edd.h>
+#include <linux/iscsi_ibft.h>
#include <linux/nodemask.h>
#include <linux/kexec.h>
#include <linux/crash_dump.h>
@@ -148,6 +149,20 @@ static inline void copy_edd(void)
}
#endif
+#if defined(CONFIG_ISCSI_IBFT_FIND)
+static void __init reserve_ibft_region(void)
+{
+ unsigned int ibft_len;
+
+ ibft_len = find_ibft();
+ if (ibft_len)
+ reserve_bootmem((unsigned int)ibft_phys,
+ PAGE_ALIGN(ibft_len));
+}
+#else
+static void __init reserve_ibft_region(void) { }
+#endif
+
int __initdata user_defined_memmap = 0;
/*
@@ -496,6 +511,7 @@ #ifdef CONFIG_BLK_DEV_INITRD
}
#endif
reserve_crashkernel();
+ reserve_ibft_region();
}
/*
diff --git a/arch/x86/kernel/setup_64.c b/arch/x86/kernel/setup_64.c
index 30d94d1..d5b73c6 100644
--- a/arch/x86/kernel/setup_64.c
+++ b/arch/x86/kernel/setup_64.c
@@ -33,6 +33,7 @@ #include <linux/pci.h>
#include <linux/acpi.h>
#include <linux/kallsyms.h>
#include <linux/edd.h>
+#include <linux/iscsi_ibft.h>
#include <linux/mmzone.h>
#include <linux/kexec.h>
#include <linux/cpufreq.h>
@@ -198,6 +199,20 @@ static inline void copy_edd(void)
}
#endif
+#if defined(CONFIG_ISCSI_IBFT_FIND)
+static void __init reserve_ibft_region(void)
+{
+ unsigned int ibft_len;
+
+ ibft_len = find_ibft();
+ if (ibft_len)
+ reserve_bootmem_generic((unsigned long)ibft_phys,
+ PAGE_ALIGN(ibft_len));
+}
+#else
+static void __init reserve_ibft_region(void) { }
+#endif
+
#ifdef CONFIG_KEXEC
static void __init reserve_crashkernel(void)
{
@@ -403,6 +418,7 @@ #ifdef CONFIG_BLK_DEV_INITRD
}
#endif
reserve_crashkernel();
+ reserve_ibft_region();
paging_init();
#ifdef CONFIG_PCI
diff --git a/drivers/firmware/Kconfig b/drivers/firmware/Kconfig
index 05f02a3..e2f7208 100644
--- a/drivers/firmware/Kconfig
+++ b/drivers/firmware/Kconfig
@@ -93,4 +93,23 @@ config DMIID
information from userspace through /sys/class/dmi/id/ or if you want
DMI-based module auto-loading.
+config ISCSI_IBFT_FIND
+ bool "iSCSI Boot Firmware Table Attributes"
+ default n
+ help
+ This option enables the kernel to find the region of memory
+ in which the ISCSI Boot Firmware Table (iBFT) resides. This
+ is necessary for iSCSI Boot Firmware Table Attributes module to work
+ properly.
+
+config ISCSI_IBFT
+ tristate "iSCSI Boot Firmware Table Attributes module"
+ depends on ISCSI_IBFT_FIND
+ default n
+ help
+ This option enables support for detection and exposing of iSCSI
+ Boot Firmware Table (iBFT) via sysfs to userspace. If you wish to
+ detect iSCSI boot parameters dynamically during system boot, say Y.
+ Otherwise, say N.
+
endmenu
diff --git a/drivers/firmware/Makefile b/drivers/firmware/Makefile
index 8d4ebc8..4c91471 100644
--- a/drivers/firmware/Makefile
+++ b/drivers/firmware/Makefile
@@ -8,3 +8,5 @@ obj-$(CONFIG_EFI_PCDP) += pcdp.o
obj-$(CONFIG_DELL_RBU) += dell_rbu.o
obj-$(CONFIG_DCDBAS) += dcdbas.o
obj-$(CONFIG_DMIID) += dmi-id.o
+obj-$(CONFIG_ISCSI_IBFT_FIND) += iscsi_ibft_find.o
+obj-$(CONFIG_ISCSI_IBFT) += iscsi_ibft.o
diff --git a/drivers/firmware/iscsi_ibft.c b/drivers/firmware/iscsi_ibft.c
new file mode 100644
index 0000000..d2d75e8
--- /dev/null
+++ b/drivers/firmware/iscsi_ibft.c
@@ -0,0 +1,775 @@
+/*
+ * Copyright 2007 Red Hat, Inc.
+ * by Peter Jones <pjones@redhat.com>
+ * Copyright 2007 IBM, Inc.
+ * by Konrad Rzeszutek <konradr@us.ibm.com>
+ *
+ * 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.
+ */
+
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/stat.h>
+#include <linux/err.h>
+#include <linux/ctype.h>
+#include <linux/slab.h>
+#include <linux/limits.h>
+#include <linux/device.h>
+#include <linux/pci.h>
+#include <linux/blkdev.h>
+#include <linux/iscsi_ibft.h>
+
+#define IBFT_ISCSI_VERSION "0.4"
+#define IBFT_ISCSI_DATE "2007-Nov-28"
+
+MODULE_AUTHOR("Peter Jones <pjones@redhat.com> and \
+Konrad Rzeszutek <konradr@us.ibm.com>");
+MODULE_DESCRIPTION("sysfs interface to BIOS iBFT information");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(IBFT_ISCSI_VERSION);
+
+/*
+ * The kobject different types and its names.
+ *
+*/
+enum ibft_id {
+ id_reserved = 0, /* Should never show up */
+ id_control = 1, /* Ditto */
+ id_initiator = 2,
+ id_nic = 3,
+ id_target = 4,
+ id_extensions, /* We don't support. */
+};
+
+static const char *ibft_id_names[] =
+ {"reserved", "control", "initiator", "ethernet%d",
+ "target%d", "extension%d"};
+
+/*
+ * The text attributes names for each of the kobjects.
+*/
+enum ibft_eth_properties_enum {
+ ibft_eth_index,
+ ibft_eth_flags,
+ ibft_eth_ip_addr,
+ ibft_eth_subnet_mask,
+ ibft_eth_origin,
+ ibft_eth_gateway,
+ ibft_eth_primary_dns,
+ ibft_eth_secondary_dns,
+ ibft_eth_dhcp,
+ ibft_eth_vlan,
+ ibft_eth_mac,
+ ibft_eth_pci_bdf,
+ ibft_eth_hostname};
+
+static const char *ibft_eth_properties[] =
+ {"index", "flags", "ip-addr", "subnet-mask", "origin", "gateway",
+ "primary-dns", "secondary-dns", "dhcp", "vlan", "mac", "pci-bdf",
+ "hostname"};
+
+enum ibft_tgt_properties_enum {
+ ibft_tgt_index,
+ ibft_tgt_flags,
+ ibft_tgt_ip_addr,
+ ibft_tgt_port,
+ ibft_tgt_lun,
+ ibft_tgt_chap_type,
+ ibft_tgt_nic_assoc,
+ ibft_tgt_name,
+ ibft_tgt_chap_name,
+ ibft_tgt_chap_secret,
+ ibft_tgt_rev_chap_name,
+ ibft_tgt_rev_chap_secret};
+
+static const char *ibft_tgt_properties[] =
+ {"index", "flags", "ip-addr", "port", "lun", "chap-type", "nic-assoc",
+ "target-name", "chap-name", "chap-secret", "rev-chap-name",
+ "rev-chap-name-secret"};
+
+enum ibft_initiator_properties_enum {
+ ibft_init_index,
+ ibft_init_flags,
+ ibft_init_isns_server,
+ ibft_init_slp_server,
+ ibft_init_pri_radius_server,
+ ibft_init_sec_radius_server,
+ ibft_init_initiator_name};
+
+static const char *ibft_initiator_properties[] =
+ {"index", "flags", "isns-server", "slp-server", "pri-radius-server",
+ "sec-radius-server", "initiator-name"};
+
+static LIST_HEAD(ibft_attr_list);
+static LIST_HEAD(ibft_kobject_list);
+
+static const char nulls[16];
+static struct ibft_table_header *ibft_device;
+
+/*
+ * Helper functions to parse data properly.
+ */
+static ssize_t sprintf_ipaddr(char *buf, u8 *ip)
+{
+ 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
+ */
+ return sprintf(buf, "%d.%d.%d.%d\n", ip[12],
+ ip[13], ip[14], ip[15]);
+ } else {
+ return 0;
+ }
+}
+
+static ssize_t sprintf_string(char *str, int len, char *buf)
+{
+ return sprintf(str, "%.*s\n", len, buf);
+}
+
+/*
+ * Helper function to verify the IBFT header.
+ */
+static int ibft_verify_hdr(struct ibft_hdr *hdr, int id, int length)
+{
+#define IBFT_VERIFY_HDR_FIELD(val, name) \
+ if (hdr->val != val) { \
+ printk(KERN_ERR \
+ "error, in IBFT structure (%s) expected %d but" \
+ " found %d\n", \
+ name, val, hdr->val); \
+ return -ENODEV; \
+ }
+ IBFT_VERIFY_HDR_FIELD(id, "ID");
+ IBFT_VERIFY_HDR_FIELD(length, "Length");
+#undef IBFT_VERIFY_HDR_FIELD
+ return 0;
+}
+
+static void ibft_release(struct kobject *kobj)
+{
+ struct ibft_kobject *ibft =
+ container_of(kobj, struct ibft_kobject, kobj);
+
+ kfree(ibft);
+}
+
+/*
+ * Routines for reading of the iBFT data in a human readable fashion.
+ */
+ssize_t ibft_attr_show_initiator(struct ibft_kobject *entry,
+ struct ibft_attribute *attr,
+ char *buf)
+{
+ struct ibft_initiator *initiator = entry->initiator;
+ void *ibft_loc = entry->header;
+ char *str = buf;
+
+ if (!initiator)
+ return 0;
+
+ switch (attr->type) {
+ case ibft_init_index:
+ str += sprintf(str, "%d\n", initiator->hdr.index);
+ break;
+ case ibft_init_flags:
+ str += sprintf(str, "%d\n", initiator->hdr.flags);
+ break;
+ case ibft_init_isns_server:
+ str += sprintf_ipaddr(str, initiator->isns_server);
+ break;
+ case ibft_init_slp_server:
+ str += sprintf_ipaddr(str, initiator->slp_server);
+ break;
+ case ibft_init_pri_radius_server:
+ str += sprintf_ipaddr(str, initiator->pri_radius_server);
+ break;
+ case ibft_init_sec_radius_server:
+ str += sprintf_ipaddr(str, initiator->sec_radius_server);
+ break;
+ case ibft_init_initiator_name:
+ str += sprintf_string(str, initiator->initiator_name_len,
+ (char *)ibft_loc + initiator->initiator_name_off);
+ break;
+ default:
+ break;
+ }
+
+ return str - buf;
+}
+
+ssize_t ibft_attr_show_nic(struct ibft_kobject *entry,
+ struct ibft_attribute *attr,
+ char *buf)
+{
+ struct ibft_nic *nic = entry->nic;
+ void *ibft_loc = entry->header;
+ char *str = buf;
+ char *mac;
+
+ if (!nic)
+ return 0;
+
+ switch (attr->type) {
+ case ibft_eth_index:
+ str += sprintf(str, "%d\n", nic->hdr.index);
+ break;
+ case ibft_eth_flags:
+ str += sprintf(str, "%d\n", nic->hdr.flags);
+ break;
+ case ibft_eth_ip_addr:
+ str += sprintf_ipaddr(str, nic->ip_addr);
+ break;
+ case ibft_eth_subnet_mask:
+ str += sprintf(str, "%d\n", nic->subnet_mask_prefix);
+ break;
+ case ibft_eth_origin:
+ str += sprintf(str, "%d\n", nic->origin);
+ break;
+ case ibft_eth_gateway:
+ str += sprintf_ipaddr(str, nic->gateway);
+ break;
+ case ibft_eth_primary_dns:
+ str += sprintf_ipaddr(str, nic->primary_dns);
+ break;
+ case ibft_eth_secondary_dns:
+ str += sprintf_ipaddr(str, nic->secondary_dns);
+ break;
+ case ibft_eth_dhcp:
+ str += sprintf_ipaddr(str, nic->dhcp);
+ break;
+ case ibft_eth_vlan:
+ str += sprintf(str, "%d\n", nic->vlan);
+ break;
+ case ibft_eth_mac:
+ mac = nic->mac;
+ str += sprintf(str, "%02x:%02x:%02x:%02x:%02x:%02x\n",
+ (u8)mac[0], (u8)mac[1], (u8)mac[2],
+ (u8)mac[3], (u8)mac[4], (u8)mac[5]);
+ break;
+ case ibft_eth_pci_bdf:
+ str += sprintf(str, "%d:%d:%d\n",
+ (nic->pci_bdf & 0xff00) >> 8,
+ (nic->pci_bdf & 0xf8) >> 3,
+ (nic->pci_bdf & 0x07));
+ break;
+ case ibft_eth_hostname:
+ str += sprintf_string(str, nic->hostname_len,
+ (char *)ibft_loc + nic->hostname_off);
+ break;
+ default:
+ break;
+ }
+
+ return str - buf;
+};
+
+ssize_t ibft_attr_show_target(struct ibft_kobject *entry,
+ struct ibft_attribute *attr,
+ char *buf)
+{
+ struct ibft_tgt *tgt = entry->tgt;
+ void *ibft_loc = entry->header;
+ char *str = buf;
+ int i;
+
+ if (!tgt)
+ return 0;
+
+ switch (attr->type) {
+ case ibft_tgt_index:
+ str += sprintf(str, "%d\n", tgt->hdr.index);
+ break;
+ case ibft_tgt_flags:
+ str += sprintf(str, "%d\n", tgt->hdr.flags);
+ break;
+ case ibft_tgt_ip_addr:
+ str += sprintf_ipaddr(str, tgt->ip_addr);
+ break;
+ case ibft_tgt_port:
+ str += sprintf(str, "%d\n", tgt->port);
+ break;
+ case ibft_tgt_lun:
+ for (i = 0; i < 8; i++)
+ str += sprintf(str, "%x", (u8)tgt->lun[i]);
+ str += sprintf(str, "\n");
+ break;
+ case ibft_tgt_nic_assoc:
+ str += sprintf(str, "%d\n", tgt->nic_assoc);
+ break;
+ case ibft_tgt_chap_type:
+ str += sprintf(str, "%d\n", tgt->chap_type);
+ break;
+ case ibft_tgt_name:
+ str += sprintf_string(str, tgt->tgt_name_len,
+ (void *)ibft_loc + tgt->tgt_name_off);
+ break;
+ case ibft_tgt_chap_name:
+ str += sprintf_string(str, tgt->chap_name_len,
+ (char *)ibft_loc + tgt->chap_name_off);
+ break;
+ case ibft_tgt_chap_secret:
+ str += sprintf_string(str, tgt->chap_secret_len,
+ (char *)ibft_loc + tgt->chap_secret_off);
+ break;
+ case ibft_tgt_rev_chap_name:
+ str += sprintf_string(str, tgt->rev_chap_name_len,
+ (char *)ibft_loc + tgt->rev_chap_name_off);
+ break;
+ case ibft_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;
+}
+
+/*
+ * The main routine which allows the user to read the IBFT data.
+ */
+static ssize_t ibft_show_attribute(struct kobject *kobj,
+ struct attribute *attr,
+ char *buf)
+{
+ struct ibft_kobject *dev =
+ container_of(kobj, struct ibft_kobject, kobj);
+ struct ibft_attribute *ibft_attr =
+ container_of(attr, struct ibft_attribute, attr);
+ ssize_t ret = -EIO;
+ char *str = buf;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EACCES;
+
+ if (ibft_attr->show)
+ ret = ibft_attr->show(dev, ibft_attr, str);
+
+ return ret;
+}
+
+static struct sysfs_ops ibft_attr_ops = {
+ .show = ibft_show_attribute,
+};
+
+static struct kobj_type ktype_ibft = {
+ .release = ibft_release,
+ .sysfs_ops = &ibft_attr_ops,
+};
+
+static decl_subsys(ibft, &ktype_ibft, NULL);
+
+static int ibft_alloc_device(void *idev)
+{
+ int len;
+ struct ibft_table_header *hdr;
+
+ if (!idev)
+ return -ENOENT;
+
+ hdr = (struct ibft_table_header *)phys_to_virt(
+ (unsigned long)ibft_phys);
+ len = hdr->length;
+
+ ibft_device = kzalloc(len, GFP_KERNEL);
+ if (!ibft_device)
+ return -ENOMEM;
+
+ memcpy(ibft_device, hdr, len);
+
+ return 0;
+}
+
+static void ibft_free_device(struct ibft_table_header *hdr)
+{
+ kfree(hdr);
+}
+
+/*
+ * Helper function for ibft_register_kobjects.
+ */
+static int ibft_create_kobject(struct ibft_table_header *header,
+ struct ibft_hdr *hdr,
+ struct list_head *list)
+{
+ struct ibft_kobject *ibft_kobj = NULL;
+ 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(hdr, id_initiator,
+ sizeof(*ibft_kobj->initiator));
+ break;
+ case id_nic:
+ rc = ibft_verify_hdr(hdr, id_nic,
+ sizeof(*ibft_kobj->nic));
+ break;
+ case id_target:
+ rc = ibft_verify_hdr(hdr, id_target,
+ sizeof(*ibft_kobj->tgt));
+ break;
+ default:
+ /* Extension field which we don't support. Ignore it */
+ break;
+ }
+
+ if (!rc) {
+ kobject_set_name(&ibft_kobj->kobj,
+ ibft_id_names[hdr->id],
+ hdr->index);
+
+ kobj_set_kset_s(ibft_kobj, ibft_subsys);
+
+ rc = kobject_register(&ibft_kobj->kobj);
+ if (!rc)
+ list_add_tail(&ibft_kobj->node, list);
+ }
+ if (rc)
+ 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.
+ */
+static int ibft_register_kobjects(struct ibft_table_header *header,
+ struct list_head *list)
+{
+ struct ibft_control *control = NULL;
+ void *ptr, *end;
+ int rc = 0;
+ u16 offset;
+
+ control = (void *)header + sizeof(*header);
+ end = (void *)control + control->hdr.length;
+
+ for (ptr = &control->initiator_off; ptr < end; ptr += sizeof(u16)) {
+ offset = *(u16 *)ptr;
+ if (offset && offset < header->length) {
+ rc = ibft_create_kobject(header,
+ (void *)header + offset,
+ list);
+ if (rc)
+ break;
+ }
+ }
+
+ return rc;
+}
+
+static void ibft_unregister_kobjects(struct list_head *list)
+{
+ struct ibft_kobject *data = NULL, *n;
+
+ list_for_each_entry_safe(data, n, list, node) {
+ list_del(&data->node);
+ kobject_unregister(&data->kobj);
+ };
+ list_del_init(list);
+}
+
+static int ibft_create_attribute(struct ibft_kobject *kobj_data,
+ int type,
+ const char *name,
+ ssize_t (*show) (struct ibft_kobject *entry,
+ struct ibft_attribute *attr,
+ char *buf),
+ struct list_head *list)
+{
+ struct ibft_attribute *attr = NULL;
+ struct ibft_hdr *hdr = kobj_data->hdr;
+
+ attr = kzalloc(sizeof(*attr), GFP_KERNEL);
+ if (!attr)
+ return -ENOMEM;
+
+ attr->attr.name = name;
+ attr->attr.mode = S_IRUSR;
+ attr->attr.owner = THIS_MODULE;
+
+ attr->hdr = hdr;
+ attr->show = show;
+ attr->kobj = &kobj_data->kobj;
+ attr->type = type;
+
+ list_add_tail(&attr->node, list);
+
+ return 0;
+}
+
+static int ibft_check_nic_for(struct ibft_nic *nic, int entry)
+{
+ int rc = 0;
+
+ switch (entry) {
+ case ibft_eth_index:
+ case ibft_eth_flags:
+ rc = 1;
+ break;
+ case ibft_eth_ip_addr:
+ if (!memcmp(nic->dhcp, nulls, sizeof(nic->dhcp)))
+ rc = 1;
+ break;
+ case ibft_eth_subnet_mask:
+ if (!memcmp(nic->dhcp, nulls, sizeof(nic->dhcp)))
+ rc = 1;
+ break;
+ case ibft_eth_origin:
+ rc = 1;
+ break;
+ case ibft_eth_gateway:
+ if (memcmp(nic->gateway, nulls, sizeof(nic->gateway)))
+ rc = 1;
+ break;
+ case ibft_eth_primary_dns:
+ if (memcmp(nic->primary_dns, nulls,
+ sizeof(nic->primary_dns)))
+ rc = 1;
+ break;
+ case ibft_eth_secondary_dns:
+ if (memcmp(nic->secondary_dns, nulls,
+ sizeof(nic->secondary_dns)))
+ rc = 1;
+ break;
+ case ibft_eth_dhcp:
+ if (memcmp(nic->dhcp, nulls, sizeof(nic->dhcp)))
+ rc = 1;
+ break;
+ case ibft_eth_vlan:
+ case ibft_eth_mac:
+ case ibft_eth_pci_bdf:
+ rc = 1;
+ break;
+ case ibft_eth_hostname:
+ if (nic->hostname_off)
+ rc = 1;
+ break;
+ default:
+ break;
+ }
+
+ return rc;
+}
+
+static int ibft_check_tgt_for(struct ibft_tgt *tgt, int entry)
+{
+ int rc = 0;
+
+ switch (entry) {
+ case ibft_tgt_index:
+ case ibft_tgt_flags:
+ case ibft_tgt_ip_addr:
+ case ibft_tgt_port:
+ case ibft_tgt_lun:
+ case ibft_tgt_nic_assoc:
+ case ibft_tgt_chap_type:
+ rc = 1;
+ case ibft_tgt_name:
+ if (tgt->tgt_name_len)
+ rc = 1;
+ break;
+ case ibft_tgt_chap_name:
+ case ibft_tgt_chap_secret:
+ if (tgt->chap_name_len)
+ rc = 1;
+ break;
+ case ibft_tgt_rev_chap_name:
+ case ibft_tgt_rev_chap_secret:
+ if (tgt->rev_chap_name_len)
+ rc = 1;
+ break;
+ default:
+ break;
+ }
+
+ return rc;
+}
+
+static int ibft_check_initiator_for(struct ibft_initiator *init, int entry)
+{
+ int rc = 0;
+
+ switch (entry) {
+ case ibft_init_index:
+ case ibft_init_flags:
+ rc = 1;
+ break;
+ case ibft_init_isns_server:
+ if (memcmp(init->isns_server, nulls,
+ sizeof(init->isns_server)))
+ rc = 1;
+ break;
+ case ibft_init_slp_server:
+ if (memcmp(init->slp_server, nulls,
+ sizeof(init->slp_server)))
+ rc = 1;
+ break;
+ case ibft_init_pri_radius_server:
+ if (memcmp(init->pri_radius_server, nulls,
+ sizeof(init->pri_radius_server)))
+ rc = 1;
+ break;
+ case ibft_init_sec_radius_server:
+ if (memcmp(init->sec_radius_server, nulls,
+ sizeof(init->sec_radius_server)))
+ rc = 1;
+ break;
+ case ibft_init_initiator_name:
+ if (init->initiator_name_len)
+ rc = 1;
+ break;
+ default:
+ break;
+ }
+
+ return rc;
+}
+
+/*
+ * Register the attributes for all of the kobjects.
+ */
+static int ibft_register_attributes(struct list_head *kobject_list,
+ struct list_head *attr_list)
+{
+ int rc = 0, i = 0;
+ struct ibft_kobject *data = NULL;
+ struct ibft_attribute *attr = NULL, *m;
+
+ list_for_each_entry(data, kobject_list, node) {
+ switch (data->hdr->id) {
+ case id_nic:
+ for (i = 0; i <= ibft_eth_hostname && !rc; i++)
+ if (ibft_check_nic_for(data->nic, i))
+ rc = ibft_create_attribute(data, i,
+ ibft_eth_properties[i],
+ ibft_attr_show_nic, attr_list);
+ break;
+ case id_target:
+ for (i = 0; i <= ibft_tgt_rev_chap_secret && !rc; i++)
+ if (ibft_check_tgt_for(data->tgt, i))
+ rc = ibft_create_attribute(data, i,
+ ibft_tgt_properties[i],
+ ibft_attr_show_target,
+ attr_list);
+ break;
+ case id_initiator:
+ for (i = 0; i <= ibft_init_initiator_name && !rc; i++)
+ if (ibft_check_initiator_for(
+ data->initiator, i))
+ rc = ibft_create_attribute(data, i,
+ ibft_initiator_properties[i],
+ ibft_attr_show_initiator,
+ attr_list);
+ break;
+ default:
+ break;
+ }
+ if (rc)
+ break;
+ }
+ list_for_each_entry_safe(attr, m, attr_list, node) {
+ rc = sysfs_create_file(attr->kobj, &attr->attr);
+ if (rc) {
+ list_del(&attr->node);
+ kfree(attr);
+ break;
+ }
+ }
+
+ return rc;
+}
+
+static void ibft_unregister_attributes(struct list_head *list)
+{
+ struct ibft_attribute *attr = NULL, *m;
+
+ list_for_each_entry_safe(attr, m, list, node) {
+ sysfs_remove_file(attr->kobj, &attr->attr);
+ list_del(&attr->node);
+ kfree(attr);
+ }
+ list_del_init(list);
+}
+
+/*
+ * ibft_init() - creates sysfs tree entries for iBFT data.
+ */
+static int __init ibft_init(void)
+{
+ int rc = 0;
+
+ if (!ibft_phys)
+ find_ibft();
+
+ rc = firmware_register(&ibft_subsys);
+ if (rc)
+ return rc;
+
+ if (ibft_phys) {
+ printk(KERN_INFO "iBFT detected at 0x%lx.\n",
+ (unsigned long)ibft_phys);
+
+ rc = ibft_alloc_device(ibft_phys);
+ if (rc)
+ goto out_firmware_unregister;
+
+ /* Scan the IBFT for data and register kobjects. */
+ rc = ibft_register_kobjects(ibft_device, &ibft_kobject_list);
+ if (rc)
+ goto out_free;
+
+ /* Register the attributes */
+ rc = ibft_register_attributes(&ibft_kobject_list,
+ &ibft_attr_list);
+ if (rc)
+ goto out_free;
+ } else
+ printk(KERN_INFO "No iBFT detected.\n");
+
+ return 0;
+
+out_free:
+ ibft_unregister_attributes(&ibft_attr_list);
+ ibft_unregister_kobjects(&ibft_kobject_list);
+ ibft_free_device(ibft_device);
+ ibft_device = NULL;
+out_firmware_unregister:
+ firmware_unregister(&ibft_subsys);
+ return rc;
+}
+
+static void __exit ibft_exit(void)
+{
+ ibft_unregister_attributes(&ibft_attr_list);
+ ibft_unregister_kobjects(&ibft_kobject_list);
+ ibft_free_device(ibft_device);
+ ibft_device = NULL;
+ firmware_unregister(&ibft_subsys);
+}
+
+module_init(ibft_init);
+module_exit(ibft_exit);
diff --git a/drivers/firmware/iscsi_ibft_find.c b/drivers/firmware/iscsi_ibft_find.c
new file mode 100644
index 0000000..c51685a
--- /dev/null
+++ b/drivers/firmware/iscsi_ibft_find.c
@@ -0,0 +1,78 @@
+/*
+ * Copyright 2007 Red Hat, Inc.
+ * by Peter Jones <pjones@redhat.com>
+ * Copyright 2007 IBM, Inc.
+ * by Konrad Rzeszutek <konradr@us.ibm.com>
+ *
+ * This code finds the iSCSI Boot Format Table.
+ *
+ * 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.
+ */
+
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/ctype.h>
+#include <linux/init.h>
+#include <linux/stat.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/limits.h>
+#include <linux/device.h>
+#include <linux/pci.h>
+#include <linux/blkdev.h>
+#include <linux/iscsi_ibft.h>
+
+
+/*
+ * Physical location of iSCSI Boot Format Table.
+ */
+void *ibft_phys;
+EXPORT_SYMBOL(ibft_phys);
+
+#define IBFT_SIGN "iBFT"
+#define IBFT_SIGN_LEN 4
+#define IBFT_START 0x80000 /* 512kB */
+#define IBFT_END 0x100000 /* 1MB */
+#define VGA_MEM 0xA0000 /* VGA buffer */
+#define VGA_SIZE 0x20000 /* 128kB */
+
+
+/*
+ * Routine used to find the iSCSI Boot Format Table. the physical
+ * location is set in the ibft_phys variable. The return value is
+ * the size of IBFT.
+ */
+ssize_t find_ibft(void)
+{
+ unsigned long pos;
+
+ for (pos = IBFT_START; pos < IBFT_END; pos += 16) {
+ void *virt;
+ /* The table can't be inside the VGA BIOS reserved space,
+ * so skip that area */
+ if (pos == VGA_MEM)
+ pos += VGA_SIZE;
+ virt = phys_to_virt(pos);
+ if (memcmp(virt, IBFT_SIGN, IBFT_SIGN_LEN) == 0) {
+ unsigned long *addr =
+ (unsigned long *)phys_to_virt(pos + 4);
+ unsigned int len = *addr;
+ /* if the length of the table extends past 1M,
+ * the table cannot be valid. */
+ if (pos + len <= (IBFT_END-1)) {
+ ibft_phys = (void *)pos;
+ return len;
+ }
+ }
+ }
+ return 0;
+}
+EXPORT_SYMBOL(find_ibft);
diff --git a/include/linux/iscsi_ibft.h b/include/linux/iscsi_ibft.h
new file mode 100644
index 0000000..420f621
--- /dev/null
+++ b/include/linux/iscsi_ibft.h
@@ -0,0 +1,126 @@
+#ifndef ISCSI_IBFT_H
+#define ISCSI_IBFT_H
+
+/*
+ * Physical location of iSCSI Boot Format Table.
+ */
+extern void *ibft_phys;
+
+/*
+ * Routine used to find the iSCSI Boot Format Table. The physical
+ * location is set in the ibft_phys variable. The return value is the
+ * size of IBFT.
+ */
+extern ssize_t find_ibft(void);
+
+#if defined(CONFIG_ISCSI_IBFT) || defined(CONFIG_ISCSI_IBFT_MODULE)
+
+struct ibft_table_header {
+ char signature[4];
+ u32 length;
+ u8 revision;
+ u8 checksum;
+ char oem_id[6];
+ char oem_table_id[8];
+ char reserved[24];
+} __attribute__((__packed__));
+
+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 and attribute structures.
+ */
+
+struct ibft_kobject {
+ struct ibft_table_header *header;
+ union {
+ struct ibft_initiator *initiator;
+ struct ibft_nic *nic;
+ struct ibft_tgt *tgt;
+ struct ibft_hdr *hdr;
+ };
+ struct kobject kobj;
+ struct list_head node;
+};
+
+struct ibft_attribute {
+ struct attribute attr;
+ ssize_t (*show) (struct ibft_kobject *entry,
+ struct ibft_attribute *attr, char *buf);
+ union {
+ struct ibft_initiator *initiator;
+ struct ibft_nic *nic;
+ struct ibft_tgt *tgt;
+ struct ibft_hdr *hdr;
+ };
+ struct kobject *kobj;
+ int type; /* The enum of the type. This can be any value off:
+ ibft_eth_properties_enum, ibft_tgt_properties_enum,
+ or ibft_initiator_properties_enum. */
+ struct list_head node;
+};
+
+#endif
+
+#endif /* ISCSI_IBFT_H */
^ permalink raw reply [flat|nested] 2+ messages in thread* Re: [REPOST PATCH] Add iSCSI IBFT support (v0.4)
2007-11-28 23:34 [REPOST PATCH] Add iSCSI IBFT support (v0.4) Konrad Rzeszutek
@ 2007-12-05 0:44 ` darnok
2007-12-05 3:12 ` Doug Maxey
0 siblings, 1 reply; 2+ messages in thread
From: darnok @ 2007-12-05 0:44 UTC (permalink / raw)
To: linux-kernel
Cc: pjones, konradr, konradr, greg, randy.dunlap, hpa, lenb,
mike.anderson, dwm, Arjan van de Ven
On Wed, Nov 28, 2007 at 07:34:22PM -0400, Konrad Rzeszutek wrote:
>
> This patch adds /sysfs/firmware/ibft/[initiator|targetX|ethernetX]
> directories along with text properties which export the the iSCSI Boot
> Firmware Table (iBFT) structure.
>
> What is iSCSI Boot Firmware Table? It is a mechanism for the iSCSI
> tools to extract from the machine NICs the iSCSI connection information
> so that they can automagically mount the iSCSI share/target. Currently
> the iSCSI information is hard-coded in the initrd.
>
> For full details of the IBFT structure please take a look at:
> ftp://ftp.software.ibm.com/systems/support/system_x_pdf/ibm_iscsi_boot_firmware_table_v1.02.pdf
>
>
> Signed-off-by: Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
Here is an updated version which provides an attribute symlink (in the
ethernetX directory) called 'device' to the NIC device, instead of
exporting a 'pci_bdf' file which had the "bus:slot:func" values.
Review would be much appreciated.
Signed-off-by: Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
diff --git a/Documentation/ABI/testing/sysfs-ibft b/Documentation/ABI/testing/sysfs-ibft
new file mode 100644
index 0000000..941ad9f
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-ibft
@@ -0,0 +1,31 @@
+What: /sys/firmware/ibft/initiator
+Date: November 2007
+Contact: Konrad Rzeszutek <konradr@us.ibm.com>
+Description: The /sys/firmware/ibft/initiator directory will contain
+ files that expose the iSCSI Boot Firmware Table initiator data.
+ Usually this contains the Initiator name.
+
+What: /sys/firmware/ibft/targetX
+Date: November 2007
+Contact: Konrad Rzeszutek <konradr@us.ibm.com>
+Description: The /sys/firmware/ibft/targetX directory will contain
+ files that expose the iSCSI Boot Firmware Table target data.
+ Usually this contains the target's IP address, boot LUN,
+ target name, and what NIC it is associated with. It can also
+ contain the CHAP name (and password), the reverse CHAP
+ name (and password)
+
+What: /sys/firmware/ibft/ethernetX
+Date: November 2007
+Contact: Konrad Rzeszutek <konradr@us.ibm.com>
+Description: The /sys/firmware/ibft/ethernetX directory will contain
+ files that expose the iSCSI Boot Firmware Table NIC data.
+ This can this can the IP address, MAC, and gateway of the NIC.
+
+What: /sys/firmware/ibft/extensionX
+Date: November 2007
+Contact: Konrad Rzeszutek <konradr@us.ibm.com>
+Description: The /sys/firmware/ibft/extensionX directory will contain
+ files that expose the iSCSI Boot Firmware Table extension data.
+ The extended data structure is not supported so there would be
+ no files in this directory.
diff --git a/arch/x86/kernel/setup_32.c b/arch/x86/kernel/setup_32.c
index e1e18c3..7c36a28 100644
--- a/arch/x86/kernel/setup_32.c
+++ b/arch/x86/kernel/setup_32.c
@@ -39,6 +39,7 @@
#include <linux/efi.h>
#include <linux/init.h>
#include <linux/edd.h>
+#include <linux/iscsi_ibft.h>
#include <linux/nodemask.h>
#include <linux/kexec.h>
#include <linux/crash_dump.h>
@@ -148,6 +149,20 @@ static inline void copy_edd(void)
}
#endif
+#if defined(CONFIG_ISCSI_IBFT_FIND)
+static void __init reserve_ibft_region(void)
+{
+ unsigned int ibft_len;
+
+ ibft_len = find_ibft();
+ if (ibft_len)
+ reserve_bootmem((unsigned int)ibft_phys,
+ PAGE_ALIGN(ibft_len));
+}
+#else
+static void __init reserve_ibft_region(void) { }
+#endif
+
int __initdata user_defined_memmap = 0;
/*
@@ -496,6 +511,7 @@ void __init setup_bootmem_allocator(void)
}
#endif
reserve_crashkernel();
+ reserve_ibft_region();
}
/*
diff --git a/arch/x86/kernel/setup_64.c b/arch/x86/kernel/setup_64.c
index 30d94d1..d5b73c6 100644
--- a/arch/x86/kernel/setup_64.c
+++ b/arch/x86/kernel/setup_64.c
@@ -33,6 +33,7 @@
#include <linux/acpi.h>
#include <linux/kallsyms.h>
#include <linux/edd.h>
+#include <linux/iscsi_ibft.h>
#include <linux/mmzone.h>
#include <linux/kexec.h>
#include <linux/cpufreq.h>
@@ -198,6 +199,20 @@ static inline void copy_edd(void)
}
#endif
+#if defined(CONFIG_ISCSI_IBFT_FIND)
+static void __init reserve_ibft_region(void)
+{
+ unsigned int ibft_len;
+
+ ibft_len = find_ibft();
+ if (ibft_len)
+ reserve_bootmem_generic((unsigned long)ibft_phys,
+ PAGE_ALIGN(ibft_len));
+}
+#else
+static void __init reserve_ibft_region(void) { }
+#endif
+
#ifdef CONFIG_KEXEC
static void __init reserve_crashkernel(void)
{
@@ -403,6 +418,7 @@ void __init setup_arch(char **cmdline_p)
}
#endif
reserve_crashkernel();
+ reserve_ibft_region();
paging_init();
#ifdef CONFIG_PCI
diff --git a/drivers/firmware/Kconfig b/drivers/firmware/Kconfig
index 05f02a3..e2f7208 100644
--- a/drivers/firmware/Kconfig
+++ b/drivers/firmware/Kconfig
@@ -93,4 +93,23 @@ config DMIID
information from userspace through /sys/class/dmi/id/ or if you want
DMI-based module auto-loading.
+config ISCSI_IBFT_FIND
+ bool "iSCSI Boot Firmware Table Attributes"
+ default n
+ help
+ This option enables the kernel to find the region of memory
+ in which the ISCSI Boot Firmware Table (iBFT) resides. This
+ is necessary for iSCSI Boot Firmware Table Attributes module to work
+ properly.
+
+config ISCSI_IBFT
+ tristate "iSCSI Boot Firmware Table Attributes module"
+ depends on ISCSI_IBFT_FIND
+ default n
+ help
+ This option enables support for detection and exposing of iSCSI
+ Boot Firmware Table (iBFT) via sysfs to userspace. If you wish to
+ detect iSCSI boot parameters dynamically during system boot, say Y.
+ Otherwise, say N.
+
endmenu
diff --git a/drivers/firmware/Makefile b/drivers/firmware/Makefile
index 8d4ebc8..4c91471 100644
--- a/drivers/firmware/Makefile
+++ b/drivers/firmware/Makefile
@@ -8,3 +8,5 @@ obj-$(CONFIG_EFI_PCDP) += pcdp.o
obj-$(CONFIG_DELL_RBU) += dell_rbu.o
obj-$(CONFIG_DCDBAS) += dcdbas.o
obj-$(CONFIG_DMIID) += dmi-id.o
+obj-$(CONFIG_ISCSI_IBFT_FIND) += iscsi_ibft_find.o
+obj-$(CONFIG_ISCSI_IBFT) += iscsi_ibft.o
diff --git a/drivers/firmware/iscsi_ibft.c b/drivers/firmware/iscsi_ibft.c
new file mode 100644
index 0000000..d668abc
--- /dev/null
+++ b/drivers/firmware/iscsi_ibft.c
@@ -0,0 +1,781 @@
+/*
+ * Copyright 2007 Red Hat, Inc.
+ * by Peter Jones <pjones@redhat.com>
+ * Copyright 2007 IBM, Inc.
+ * by Konrad Rzeszutek <konradr@us.ibm.com>
+ *
+ * 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.
+ */
+
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/stat.h>
+#include <linux/err.h>
+#include <linux/ctype.h>
+#include <linux/slab.h>
+#include <linux/limits.h>
+#include <linux/device.h>
+#include <linux/pci.h>
+#include <linux/blkdev.h>
+#include <linux/iscsi_ibft.h>
+
+#define IBFT_ISCSI_VERSION "0.4.1"
+#define IBFT_ISCSI_DATE "2007-Dec-04"
+
+MODULE_AUTHOR("Peter Jones <pjones@redhat.com> and \
+Konrad Rzeszutek <konradr@us.ibm.com>");
+MODULE_DESCRIPTION("sysfs interface to BIOS iBFT information");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(IBFT_ISCSI_VERSION);
+
+/*
+ * The kobject different types and its names.
+ *
+*/
+enum ibft_id {
+ id_reserved = 0, /* Should never show up */
+ id_control = 1, /* Ditto */
+ id_initiator = 2,
+ id_nic = 3,
+ id_target = 4,
+ id_extensions, /* We don't support. */
+};
+
+static const char *ibft_id_names[] =
+ {"reserved", "control", "initiator", "ethernet%d",
+ "target%d", "extension%d"};
+
+/*
+ * The text attributes names for each of the kobjects.
+*/
+enum ibft_eth_properties_enum {
+ ibft_eth_index,
+ ibft_eth_flags,
+ ibft_eth_ip_addr,
+ ibft_eth_subnet_mask,
+ ibft_eth_origin,
+ ibft_eth_gateway,
+ ibft_eth_primary_dns,
+ ibft_eth_secondary_dns,
+ ibft_eth_dhcp,
+ ibft_eth_vlan,
+ ibft_eth_mac,
+ /* ibft_eth_pci_bdf - this is replaced by link to the device itself. */
+ ibft_eth_hostname};
+
+static const char *ibft_eth_properties[] =
+ {"index", "flags", "ip-addr", "subnet-mask", "origin", "gateway",
+ "primary-dns", "secondary-dns", "dhcp", "vlan", "mac", "hostname"};
+
+enum ibft_tgt_properties_enum {
+ ibft_tgt_index,
+ ibft_tgt_flags,
+ ibft_tgt_ip_addr,
+ ibft_tgt_port,
+ ibft_tgt_lun,
+ ibft_tgt_chap_type,
+ ibft_tgt_nic_assoc,
+ ibft_tgt_name,
+ ibft_tgt_chap_name,
+ ibft_tgt_chap_secret,
+ ibft_tgt_rev_chap_name,
+ ibft_tgt_rev_chap_secret};
+
+static const char *ibft_tgt_properties[] =
+ {"index", "flags", "ip-addr", "port", "lun", "chap-type", "nic-assoc",
+ "target-name", "chap-name", "chap-secret", "rev-chap-name",
+ "rev-chap-name-secret"};
+
+enum ibft_initiator_properties_enum {
+ ibft_init_index,
+ ibft_init_flags,
+ ibft_init_isns_server,
+ ibft_init_slp_server,
+ ibft_init_pri_radius_server,
+ ibft_init_sec_radius_server,
+ ibft_init_initiator_name};
+
+static const char *ibft_initiator_properties[] =
+ {"index", "flags", "isns-server", "slp-server", "pri-radius-server",
+ "sec-radius-server", "initiator-name"};
+
+static LIST_HEAD(ibft_attr_list);
+static LIST_HEAD(ibft_kobject_list);
+
+static const char nulls[16];
+static struct ibft_table_header *ibft_device;
+
+/*
+ * Helper functions to parse data properly.
+ */
+static ssize_t sprintf_ipaddr(char *buf, u8 *ip)
+{
+ 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
+ */
+ return sprintf(buf, "%d.%d.%d.%d\n", ip[12],
+ ip[13], ip[14], ip[15]);
+ } else {
+ return 0;
+ }
+}
+
+static ssize_t sprintf_string(char *str, int len, char *buf)
+{
+ return sprintf(str, "%.*s\n", len, buf);
+}
+
+/*
+ * Helper function to verify the IBFT header.
+ */
+static int ibft_verify_hdr(struct ibft_hdr *hdr, int id, int length)
+{
+#define IBFT_VERIFY_HDR_FIELD(val, name) \
+ if (hdr->val != val) { \
+ printk(KERN_ERR \
+ "error, in IBFT structure (%s) expected %d but" \
+ " found %d\n", \
+ name, val, hdr->val); \
+ return -ENODEV; \
+ }
+ IBFT_VERIFY_HDR_FIELD(id, "ID");
+ IBFT_VERIFY_HDR_FIELD(length, "Length");
+#undef IBFT_VERIFY_HDR_FIELD
+ return 0;
+}
+
+static void ibft_release(struct kobject *kobj)
+{
+ struct ibft_kobject *ibft =
+ container_of(kobj, struct ibft_kobject, kobj);
+ kfree(ibft);
+}
+
+/*
+ * Routines for reading of the iBFT data in a human readable fashion.
+ */
+ssize_t ibft_attr_show_initiator(struct ibft_kobject *entry,
+ struct ibft_attribute *attr,
+ char *buf)
+{
+ struct ibft_initiator *initiator = entry->initiator;
+ void *ibft_loc = entry->header;
+ char *str = buf;
+
+ if (!initiator)
+ return 0;
+
+ switch (attr->type) {
+ case ibft_init_index:
+ str += sprintf(str, "%d\n", initiator->hdr.index);
+ break;
+ case ibft_init_flags:
+ str += sprintf(str, "%d\n", initiator->hdr.flags);
+ break;
+ case ibft_init_isns_server:
+ str += sprintf_ipaddr(str, initiator->isns_server);
+ break;
+ case ibft_init_slp_server:
+ str += sprintf_ipaddr(str, initiator->slp_server);
+ break;
+ case ibft_init_pri_radius_server:
+ str += sprintf_ipaddr(str, initiator->pri_radius_server);
+ break;
+ case ibft_init_sec_radius_server:
+ str += sprintf_ipaddr(str, initiator->sec_radius_server);
+ break;
+ case ibft_init_initiator_name:
+ str += sprintf_string(str, initiator->initiator_name_len,
+ (char *)ibft_loc + initiator->initiator_name_off);
+ break;
+ default:
+ break;
+ }
+
+ return str - buf;
+}
+
+ssize_t ibft_attr_show_nic(struct ibft_kobject *entry,
+ struct ibft_attribute *attr,
+ char *buf)
+{
+ struct ibft_nic *nic = entry->nic;
+ void *ibft_loc = entry->header;
+ char *str = buf;
+ char *mac;
+
+ if (!nic)
+ return 0;
+
+ switch (attr->type) {
+ case ibft_eth_index:
+ str += sprintf(str, "%d\n", nic->hdr.index);
+ break;
+ case ibft_eth_flags:
+ str += sprintf(str, "%d\n", nic->hdr.flags);
+ break;
+ case ibft_eth_ip_addr:
+ str += sprintf_ipaddr(str, nic->ip_addr);
+ break;
+ case ibft_eth_subnet_mask:
+ str += sprintf(str, "%d\n", nic->subnet_mask_prefix);
+ break;
+ case ibft_eth_origin:
+ str += sprintf(str, "%d\n", nic->origin);
+ break;
+ case ibft_eth_gateway:
+ str += sprintf_ipaddr(str, nic->gateway);
+ break;
+ case ibft_eth_primary_dns:
+ str += sprintf_ipaddr(str, nic->primary_dns);
+ break;
+ case ibft_eth_secondary_dns:
+ str += sprintf_ipaddr(str, nic->secondary_dns);
+ break;
+ case ibft_eth_dhcp:
+ str += sprintf_ipaddr(str, nic->dhcp);
+ break;
+ case ibft_eth_vlan:
+ str += sprintf(str, "%d\n", nic->vlan);
+ break;
+ case ibft_eth_mac:
+ mac = nic->mac;
+ str += sprintf(str, "%02x:%02x:%02x:%02x:%02x:%02x\n",
+ (u8)mac[0], (u8)mac[1], (u8)mac[2],
+ (u8)mac[3], (u8)mac[4], (u8)mac[5]);
+ break;
+ case ibft_eth_hostname:
+ str += sprintf_string(str, nic->hostname_len,
+ (char *)ibft_loc + nic->hostname_off);
+ break;
+ default:
+ break;
+ }
+
+ return str - buf;
+};
+
+ssize_t ibft_attr_show_target(struct ibft_kobject *entry,
+ struct ibft_attribute *attr,
+ char *buf)
+{
+ struct ibft_tgt *tgt = entry->tgt;
+ void *ibft_loc = entry->header;
+ char *str = buf;
+ int i;
+
+ if (!tgt)
+ return 0;
+
+ switch (attr->type) {
+ case ibft_tgt_index:
+ str += sprintf(str, "%d\n", tgt->hdr.index);
+ break;
+ case ibft_tgt_flags:
+ str += sprintf(str, "%d\n", tgt->hdr.flags);
+ break;
+ case ibft_tgt_ip_addr:
+ str += sprintf_ipaddr(str, tgt->ip_addr);
+ break;
+ case ibft_tgt_port:
+ str += sprintf(str, "%d\n", tgt->port);
+ break;
+ case ibft_tgt_lun:
+ for (i = 0; i < 8; i++)
+ str += sprintf(str, "%x", (u8)tgt->lun[i]);
+ str += sprintf(str, "\n");
+ break;
+ case ibft_tgt_nic_assoc:
+ str += sprintf(str, "%d\n", tgt->nic_assoc);
+ break;
+ case ibft_tgt_chap_type:
+ str += sprintf(str, "%d\n", tgt->chap_type);
+ break;
+ case ibft_tgt_name:
+ str += sprintf_string(str, tgt->tgt_name_len,
+ (void *)ibft_loc + tgt->tgt_name_off);
+ break;
+ case ibft_tgt_chap_name:
+ str += sprintf_string(str, tgt->chap_name_len,
+ (char *)ibft_loc + tgt->chap_name_off);
+ break;
+ case ibft_tgt_chap_secret:
+ str += sprintf_string(str, tgt->chap_secret_len,
+ (char *)ibft_loc + tgt->chap_secret_off);
+ break;
+ case ibft_tgt_rev_chap_name:
+ str += sprintf_string(str, tgt->rev_chap_name_len,
+ (char *)ibft_loc + tgt->rev_chap_name_off);
+ break;
+ case ibft_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;
+}
+
+/*
+ * The main routine which allows the user to read the IBFT data.
+ */
+static ssize_t ibft_show_attribute(struct kobject *kobj,
+ struct attribute *attr,
+ char *buf)
+{
+ struct ibft_kobject *dev =
+ container_of(kobj, struct ibft_kobject, kobj);
+ struct ibft_attribute *ibft_attr =
+ container_of(attr, struct ibft_attribute, attr);
+ ssize_t ret = -EIO;
+ char *str = buf;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EACCES;
+
+ if (ibft_attr->show)
+ ret = ibft_attr->show(dev, ibft_attr, str);
+
+ return ret;
+}
+
+static struct sysfs_ops ibft_attr_ops = {
+ .show = ibft_show_attribute,
+};
+
+static struct kobj_type ktype_ibft = {
+ .release = ibft_release,
+ .sysfs_ops = &ibft_attr_ops,
+};
+
+static decl_subsys(ibft, &ktype_ibft, NULL);
+
+static int ibft_alloc_device(void *idev)
+{
+ int len;
+ struct ibft_table_header *hdr;
+
+ if (!idev)
+ return -ENOENT;
+
+ hdr = (struct ibft_table_header *)phys_to_virt(
+ (unsigned long)ibft_phys);
+ len = hdr->length;
+
+ ibft_device = kzalloc(len, GFP_KERNEL);
+ if (!ibft_device)
+ return -ENOMEM;
+
+ memcpy(ibft_device, hdr, len);
+
+ return 0;
+}
+
+static void ibft_free_device(struct ibft_table_header *hdr)
+{
+ kfree(hdr);
+}
+
+/*
+ * Helper function for ibft_register_kobjects.
+ */
+static int ibft_create_kobject(struct ibft_table_header *header,
+ struct ibft_hdr *hdr,
+ struct list_head *list)
+{
+ int rc = 0;
+ struct ibft_kobject *ibft_kobj = NULL;
+
+ 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(hdr, id_initiator,
+ sizeof(*ibft_kobj->initiator));
+ break;
+ case id_nic:
+ rc = ibft_verify_hdr(hdr, id_nic,
+ sizeof(*ibft_kobj->nic));
+ break;
+ case id_target:
+ rc = ibft_verify_hdr(hdr, id_target,
+ sizeof(*ibft_kobj->tgt));
+ break;
+ default:
+ /* Extension field which we don't support. Ignore it */
+ break;
+ }
+
+ if (!rc) {
+ kobject_set_name(&ibft_kobj->kobj,
+ ibft_id_names[hdr->id],
+ hdr->index);
+
+ kobj_set_kset_s(ibft_kobj, ibft_subsys);
+
+ rc = kobject_register(&ibft_kobj->kobj);
+ if (!rc && hdr->id == id_nic) {
+ struct ibft_nic *nic = (struct ibft_nic *)hdr;
+ struct pci_dev *pci_dev = pci_get_bus_and_slot(
+ (nic->pci_bdf & 0xff00) >> 8,
+ (nic->pci_bdf & 0xff));
+ if (pci_dev) {
+ rc = sysfs_create_link(&ibft_kobj->kobj,
+ &pci_dev->dev.kobj, "device");
+ if (rc)
+ kobject_unregister(&ibft_kobj->kobj);
+ pci_dev_put(pci_dev);
+ }
+ }
+ if (!rc)
+ list_add_tail(&ibft_kobj->node, list);
+
+ }
+ if (rc)
+ 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.
+ */
+static int ibft_register_kobjects(struct ibft_table_header *header,
+ struct list_head *list)
+{
+ struct ibft_control *control = NULL;
+ void *ptr, *end;
+ int rc = 0;
+ u16 offset;
+
+ control = (void *)header + sizeof(*header);
+ end = (void *)control + control->hdr.length;
+
+ for (ptr = &control->initiator_off; ptr < end; ptr += sizeof(u16)) {
+ offset = *(u16 *)ptr;
+ if (offset && offset < header->length) {
+ rc = ibft_create_kobject(header,
+ (void *)header + offset,
+ list);
+ if (rc)
+ break;
+ }
+ }
+
+ return rc;
+}
+
+static void ibft_unregister_kobjects(struct list_head *list)
+{
+ struct ibft_kobject *data = NULL, *n;
+ list_for_each_entry_safe(data, n, list, node) {
+ list_del(&data->node);
+ if (data->hdr->id == id_nic)
+ sysfs_remove_link(&data->kobj, "device");
+ kobject_unregister(&data->kobj);
+ };
+ list_del_init(list);
+}
+
+static int ibft_create_attribute(struct ibft_kobject *kobj_data,
+ int type,
+ const char *name,
+ ssize_t (*show) (struct ibft_kobject *entry,
+ struct ibft_attribute *attr,
+ char *buf),
+ struct list_head *list)
+{
+ struct ibft_attribute *attr = NULL;
+ struct ibft_hdr *hdr = kobj_data->hdr;
+
+ attr = kzalloc(sizeof(*attr), GFP_KERNEL);
+ if (!attr)
+ return -ENOMEM;
+
+ attr->attr.name = name;
+ attr->attr.mode = S_IRUSR;
+ attr->attr.owner = THIS_MODULE;
+
+ attr->hdr = hdr;
+ attr->show = show;
+ attr->kobj = &kobj_data->kobj;
+ attr->type = type;
+
+ list_add_tail(&attr->node, list);
+
+ return 0;
+}
+
+static int ibft_check_nic_for(struct ibft_nic *nic, int entry)
+{
+ int rc = 0;
+
+ switch (entry) {
+ case ibft_eth_index:
+ case ibft_eth_flags:
+ rc = 1;
+ break;
+ case ibft_eth_ip_addr:
+ if (!memcmp(nic->dhcp, nulls, sizeof(nic->dhcp)))
+ rc = 1;
+ break;
+ case ibft_eth_subnet_mask:
+ if (!memcmp(nic->dhcp, nulls, sizeof(nic->dhcp)))
+ rc = 1;
+ break;
+ case ibft_eth_origin:
+ rc = 1;
+ break;
+ case ibft_eth_gateway:
+ if (memcmp(nic->gateway, nulls, sizeof(nic->gateway)))
+ rc = 1;
+ break;
+ case ibft_eth_primary_dns:
+ if (memcmp(nic->primary_dns, nulls,
+ sizeof(nic->primary_dns)))
+ rc = 1;
+ break;
+ case ibft_eth_secondary_dns:
+ if (memcmp(nic->secondary_dns, nulls,
+ sizeof(nic->secondary_dns)))
+ rc = 1;
+ break;
+ case ibft_eth_dhcp:
+ if (memcmp(nic->dhcp, nulls, sizeof(nic->dhcp)))
+ rc = 1;
+ break;
+ case ibft_eth_vlan:
+ case ibft_eth_mac:
+ rc = 1;
+ break;
+ case ibft_eth_hostname:
+ if (nic->hostname_off)
+ rc = 1;
+ break;
+ default:
+ break;
+ }
+
+ return rc;
+}
+
+static int ibft_check_tgt_for(struct ibft_tgt *tgt, int entry)
+{
+ int rc = 0;
+
+ switch (entry) {
+ case ibft_tgt_index:
+ case ibft_tgt_flags:
+ case ibft_tgt_ip_addr:
+ case ibft_tgt_port:
+ case ibft_tgt_lun:
+ case ibft_tgt_nic_assoc:
+ case ibft_tgt_chap_type:
+ rc = 1;
+ case ibft_tgt_name:
+ if (tgt->tgt_name_len)
+ rc = 1;
+ break;
+ case ibft_tgt_chap_name:
+ case ibft_tgt_chap_secret:
+ if (tgt->chap_name_len)
+ rc = 1;
+ break;
+ case ibft_tgt_rev_chap_name:
+ case ibft_tgt_rev_chap_secret:
+ if (tgt->rev_chap_name_len)
+ rc = 1;
+ break;
+ default:
+ break;
+ }
+
+ return rc;
+}
+
+static int ibft_check_initiator_for(struct ibft_initiator *init, int entry)
+{
+ int rc = 0;
+
+ switch (entry) {
+ case ibft_init_index:
+ case ibft_init_flags:
+ rc = 1;
+ break;
+ case ibft_init_isns_server:
+ if (memcmp(init->isns_server, nulls,
+ sizeof(init->isns_server)))
+ rc = 1;
+ break;
+ case ibft_init_slp_server:
+ if (memcmp(init->slp_server, nulls,
+ sizeof(init->slp_server)))
+ rc = 1;
+ break;
+ case ibft_init_pri_radius_server:
+ if (memcmp(init->pri_radius_server, nulls,
+ sizeof(init->pri_radius_server)))
+ rc = 1;
+ break;
+ case ibft_init_sec_radius_server:
+ if (memcmp(init->sec_radius_server, nulls,
+ sizeof(init->sec_radius_server)))
+ rc = 1;
+ break;
+ case ibft_init_initiator_name:
+ if (init->initiator_name_len)
+ rc = 1;
+ break;
+ default:
+ break;
+ }
+
+ return rc;
+}
+
+/*
+ * Register the attributes for all of the kobjects.
+ */
+static int ibft_register_attributes(struct list_head *kobject_list,
+ struct list_head *attr_list)
+{
+ int rc = 0, i = 0;
+ struct ibft_kobject *data = NULL;
+ struct ibft_attribute *attr = NULL, *m;
+
+ list_for_each_entry(data, kobject_list, node) {
+ switch (data->hdr->id) {
+ case id_nic:
+ for (i = 0; i <= ibft_eth_hostname && !rc; i++)
+ if (ibft_check_nic_for(data->nic, i))
+ rc = ibft_create_attribute(data, i,
+ ibft_eth_properties[i],
+ ibft_attr_show_nic, attr_list);
+ break;
+ case id_target:
+ for (i = 0; i <= ibft_tgt_rev_chap_secret && !rc; i++)
+ if (ibft_check_tgt_for(data->tgt, i))
+ rc = ibft_create_attribute(data, i,
+ ibft_tgt_properties[i],
+ ibft_attr_show_target,
+ attr_list);
+ break;
+ case id_initiator:
+ for (i = 0; i <= ibft_init_initiator_name && !rc; i++)
+ if (ibft_check_initiator_for(
+ data->initiator, i))
+ rc = ibft_create_attribute(data, i,
+ ibft_initiator_properties[i],
+ ibft_attr_show_initiator,
+ attr_list);
+ break;
+ default:
+ break;
+ }
+ if (rc)
+ break;
+ }
+ list_for_each_entry_safe(attr, m, attr_list, node) {
+ rc = sysfs_create_file(attr->kobj, &attr->attr);
+ if (rc) {
+ list_del(&attr->node);
+ kfree(attr);
+ break;
+ }
+ }
+
+ return rc;
+}
+
+static void ibft_unregister_attributes(struct list_head *list)
+{
+ struct ibft_attribute *attr = NULL, *m;
+
+ list_for_each_entry_safe(attr, m, list, node) {
+ sysfs_remove_file(attr->kobj, &attr->attr);
+ list_del(&attr->node);
+ kfree(attr);
+ }
+ list_del_init(list);
+}
+
+/*
+ * ibft_init() - creates sysfs tree entries for iBFT data.
+ */
+static int __init ibft_init(void)
+{
+ int rc = 0;
+
+ if (!ibft_phys)
+ find_ibft();
+
+ rc = firmware_register(&ibft_subsys);
+ if (rc)
+ return rc;
+
+ if (ibft_phys) {
+ printk(KERN_INFO "iBFT detected at 0x%lx.\n",
+ (unsigned long)ibft_phys);
+
+ rc = ibft_alloc_device(ibft_phys);
+ if (rc)
+ goto out_firmware_unregister;
+
+ /* Scan the IBFT for data and register kobjects. */
+ rc = ibft_register_kobjects(ibft_device, &ibft_kobject_list);
+ if (rc)
+ goto out_free;
+
+ /* Register the attributes */
+ rc = ibft_register_attributes(&ibft_kobject_list,
+ &ibft_attr_list);
+ if (rc)
+ goto out_free;
+ } else
+ printk(KERN_INFO "No iBFT detected.\n");
+
+ return 0;
+
+out_free:
+ ibft_unregister_attributes(&ibft_attr_list);
+ ibft_unregister_kobjects(&ibft_kobject_list);
+ ibft_free_device(ibft_device);
+ ibft_device = NULL;
+out_firmware_unregister:
+ firmware_unregister(&ibft_subsys);
+ return rc;
+}
+
+static void __exit ibft_exit(void)
+{
+ ibft_unregister_attributes(&ibft_attr_list);
+ ibft_unregister_kobjects(&ibft_kobject_list);
+ ibft_free_device(ibft_device);
+ ibft_device = NULL;
+ firmware_unregister(&ibft_subsys);
+}
+
+module_init(ibft_init);
+module_exit(ibft_exit);
diff --git a/drivers/firmware/iscsi_ibft_find.c b/drivers/firmware/iscsi_ibft_find.c
new file mode 100644
index 0000000..c51685a
--- /dev/null
+++ b/drivers/firmware/iscsi_ibft_find.c
@@ -0,0 +1,78 @@
+/*
+ * Copyright 2007 Red Hat, Inc.
+ * by Peter Jones <pjones@redhat.com>
+ * Copyright 2007 IBM, Inc.
+ * by Konrad Rzeszutek <konradr@us.ibm.com>
+ *
+ * This code finds the iSCSI Boot Format Table.
+ *
+ * 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.
+ */
+
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/ctype.h>
+#include <linux/init.h>
+#include <linux/stat.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/limits.h>
+#include <linux/device.h>
+#include <linux/pci.h>
+#include <linux/blkdev.h>
+#include <linux/iscsi_ibft.h>
+
+
+/*
+ * Physical location of iSCSI Boot Format Table.
+ */
+void *ibft_phys;
+EXPORT_SYMBOL(ibft_phys);
+
+#define IBFT_SIGN "iBFT"
+#define IBFT_SIGN_LEN 4
+#define IBFT_START 0x80000 /* 512kB */
+#define IBFT_END 0x100000 /* 1MB */
+#define VGA_MEM 0xA0000 /* VGA buffer */
+#define VGA_SIZE 0x20000 /* 128kB */
+
+
+/*
+ * Routine used to find the iSCSI Boot Format Table. the physical
+ * location is set in the ibft_phys variable. The return value is
+ * the size of IBFT.
+ */
+ssize_t find_ibft(void)
+{
+ unsigned long pos;
+
+ for (pos = IBFT_START; pos < IBFT_END; pos += 16) {
+ void *virt;
+ /* The table can't be inside the VGA BIOS reserved space,
+ * so skip that area */
+ if (pos == VGA_MEM)
+ pos += VGA_SIZE;
+ virt = phys_to_virt(pos);
+ if (memcmp(virt, IBFT_SIGN, IBFT_SIGN_LEN) == 0) {
+ unsigned long *addr =
+ (unsigned long *)phys_to_virt(pos + 4);
+ unsigned int len = *addr;
+ /* if the length of the table extends past 1M,
+ * the table cannot be valid. */
+ if (pos + len <= (IBFT_END-1)) {
+ ibft_phys = (void *)pos;
+ return len;
+ }
+ }
+ }
+ return 0;
+}
+EXPORT_SYMBOL(find_ibft);
diff --git a/include/linux/iscsi_ibft.h b/include/linux/iscsi_ibft.h
new file mode 100644
index 0000000..420f621
--- /dev/null
+++ b/include/linux/iscsi_ibft.h
@@ -0,0 +1,126 @@
+#ifndef ISCSI_IBFT_H
+#define ISCSI_IBFT_H
+
+/*
+ * Physical location of iSCSI Boot Format Table.
+ */
+extern void *ibft_phys;
+
+/*
+ * Routine used to find the iSCSI Boot Format Table. The physical
+ * location is set in the ibft_phys variable. The return value is the
+ * size of IBFT.
+ */
+extern ssize_t find_ibft(void);
+
+#if defined(CONFIG_ISCSI_IBFT) || defined(CONFIG_ISCSI_IBFT_MODULE)
+
+struct ibft_table_header {
+ char signature[4];
+ u32 length;
+ u8 revision;
+ u8 checksum;
+ char oem_id[6];
+ char oem_table_id[8];
+ char reserved[24];
+} __attribute__((__packed__));
+
+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 and attribute structures.
+ */
+
+struct ibft_kobject {
+ struct ibft_table_header *header;
+ union {
+ struct ibft_initiator *initiator;
+ struct ibft_nic *nic;
+ struct ibft_tgt *tgt;
+ struct ibft_hdr *hdr;
+ };
+ struct kobject kobj;
+ struct list_head node;
+};
+
+struct ibft_attribute {
+ struct attribute attr;
+ ssize_t (*show) (struct ibft_kobject *entry,
+ struct ibft_attribute *attr, char *buf);
+ union {
+ struct ibft_initiator *initiator;
+ struct ibft_nic *nic;
+ struct ibft_tgt *tgt;
+ struct ibft_hdr *hdr;
+ };
+ struct kobject *kobj;
+ int type; /* The enum of the type. This can be any value off:
+ ibft_eth_properties_enum, ibft_tgt_properties_enum,
+ or ibft_initiator_properties_enum. */
+ struct list_head node;
+};
+
+#endif
+
+#endif /* ISCSI_IBFT_H */
^ permalink raw reply [flat|nested] 2+ messages in thread* Re: [REPOST PATCH] Add iSCSI IBFT support (v0.4)
2007-12-05 0:44 ` darnok
@ 2007-12-05 3:12 ` Doug Maxey
2007-12-05 19:47 ` [PATCH] Add iSCSI IBFT support (v0.4.2) Konrad Rzeszutek
0 siblings, 1 reply; 2+ messages in thread
From: Doug Maxey @ 2007-12-05 3:12 UTC (permalink / raw)
To: darnok
Cc: linux-kernel, pjones, konradr, konradr, greg, randy.dunlap, hpa,
lenb, mike.anderson, dwm, Arjan van de Ven
Overall, looks nice. Good work.
comments inline below...
On Tue, 04 Dec 2007 20:44:19 -0400, darnok@68k.org wrote:
> On Wed, Nov 28, 2007 at 07:34:22PM -0400, Konrad Rzeszutek wrote:
> >
> > This patch adds /sysfs/firmware/ibft/[initiator|targetX|ethernetX]
> > directories along with text properties which export the the iSCSI Boot
> > Firmware Table (iBFT) structure.
> >
> > What is iSCSI Boot Firmware Table? It is a mechanism for the iSCSI
> > tools to extract from the machine NICs the iSCSI connection information
> > so that they can automagically mount the iSCSI share/target. Currently
> > the iSCSI information is hard-coded in the initrd.
> >
> > For full details of the IBFT structure please take a look at:
> > ftp://ftp.software.ibm.com/systems/support/system_x_pdf/ibm_iscsi_boot_firmware_table_v1.02.pdf
> >
> >
> > Signed-off-by: Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
>
> Here is an updated version which provides an attribute symlink (in the
> ethernetX directory) called 'device' to the NIC device, instead of
> exporting a 'pci_bdf' file which had the "bus:slot:func" values.
>
> Review would be much appreciated.
>
> Signed-off-by: Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
>
> diff --git a/Documentation/ABI/testing/sysfs-ibft b/Documentation/ABI/testing/sysfs-ibft
> new file mode 100644
> index 0000000..941ad9f
> --- /dev/null
> +++ b/Documentation/ABI/testing/sysfs-ibft
> @@ -0,0 +1,31 @@
> +What: /sys/firmware/ibft/initiator
> +Date: November 2007
> +Contact: Konrad Rzeszutek <konradr@us.ibm.com>
> +Description: The /sys/firmware/ibft/initiator directory will contain
> + files that expose the iSCSI Boot Firmware Table initiator data.
> + Usually this contains the Initiator name.
> +
> +What: /sys/firmware/ibft/targetX
> +Date: November 2007
> +Contact: Konrad Rzeszutek <konradr@us.ibm.com>
> +Description: The /sys/firmware/ibft/targetX directory will contain
> + files that expose the iSCSI Boot Firmware Table target data.
> + Usually this contains the target's IP address, boot LUN,
> + target name, and what NIC it is associated with. It can also
> + contain the CHAP name (and password), the reverse CHAP
> + name (and password)
> +
> +What: /sys/firmware/ibft/ethernetX
> +Date: November 2007
> +Contact: Konrad Rzeszutek <konradr@us.ibm.com>
> +Description: The /sys/firmware/ibft/ethernetX directory will contain
> + files that expose the iSCSI Boot Firmware Table NIC data.
> + This can this can the IP address, MAC, and gateway of the NIC.
> +
> +What: /sys/firmware/ibft/extensionX
> +Date: November 2007
> +Contact: Konrad Rzeszutek <konradr@us.ibm.com>
> +Description: The /sys/firmware/ibft/extensionX directory will contain
> + files that expose the iSCSI Boot Firmware Table extension data.
> + The extended data structure is not supported so there would be
> + no files in this directory.
> diff --git a/arch/x86/kernel/setup_32.c b/arch/x86/kernel/setup_32.c
> index e1e18c3..7c36a28 100644
> --- a/arch/x86/kernel/setup_32.c
> +++ b/arch/x86/kernel/setup_32.c
> @@ -39,6 +39,7 @@
> #include <linux/efi.h>
> #include <linux/init.h>
> #include <linux/edd.h>
> +#include <linux/iscsi_ibft.h>
> #include <linux/nodemask.h>
> #include <linux/kexec.h>
> #include <linux/crash_dump.h>
> @@ -148,6 +149,20 @@ static inline void copy_edd(void)
> }
> #endif
>
> +#if defined(CONFIG_ISCSI_IBFT_FIND)
> +static void __init reserve_ibft_region(void)
> +{
> + unsigned int ibft_len;
> +
> + ibft_len = find_ibft();
> + if (ibft_len)
> + reserve_bootmem((unsigned int)ibft_phys,
> + PAGE_ALIGN(ibft_len));
> +}
> +#else
> +static void __init reserve_ibft_region(void) { }
> +#endif
> +
> int __initdata user_defined_memmap = 0;
>
> /*
> @@ -496,6 +511,7 @@ void __init setup_bootmem_allocator(void)
> }
> #endif
> reserve_crashkernel();
> + reserve_ibft_region();
> }
>
> /*
> diff --git a/arch/x86/kernel/setup_64.c b/arch/x86/kernel/setup_64.c
> index 30d94d1..d5b73c6 100644
> --- a/arch/x86/kernel/setup_64.c
> +++ b/arch/x86/kernel/setup_64.c
> @@ -33,6 +33,7 @@
> #include <linux/acpi.h>
> #include <linux/kallsyms.h>
> #include <linux/edd.h>
> +#include <linux/iscsi_ibft.h>
> #include <linux/mmzone.h>
> #include <linux/kexec.h>
> #include <linux/cpufreq.h>
> @@ -198,6 +199,20 @@ static inline void copy_edd(void)
> }
> #endif
>
> +#if defined(CONFIG_ISCSI_IBFT_FIND)
> +static void __init reserve_ibft_region(void)
> +{
> + unsigned int ibft_len;
> +
> + ibft_len = find_ibft();
> + if (ibft_len)
> + reserve_bootmem_generic((unsigned long)ibft_phys,
> + PAGE_ALIGN(ibft_len));
> +}
> +#else
> +static void __init reserve_ibft_region(void) { }
> +#endif
> +
> #ifdef CONFIG_KEXEC
> static void __init reserve_crashkernel(void)
> {
> @@ -403,6 +418,7 @@ void __init setup_arch(char **cmdline_p)
> }
> #endif
> reserve_crashkernel();
> + reserve_ibft_region();
> paging_init();
>
> #ifdef CONFIG_PCI
> diff --git a/drivers/firmware/Kconfig b/drivers/firmware/Kconfig
> index 05f02a3..e2f7208 100644
> --- a/drivers/firmware/Kconfig
> +++ b/drivers/firmware/Kconfig
> @@ -93,4 +93,23 @@ config DMIID
> information from userspace through /sys/class/dmi/id/ or if you want
> DMI-based module auto-loading.
>
> +config ISCSI_IBFT_FIND
> + bool "iSCSI Boot Firmware Table Attributes"
> + default n
> + help
> + This option enables the kernel to find the region of memory
> + in which the ISCSI Boot Firmware Table (iBFT) resides. This
> + is necessary for iSCSI Boot Firmware Table Attributes module to work
> + properly.
> +
> +config ISCSI_IBFT
> + tristate "iSCSI Boot Firmware Table Attributes module"
> + depends on ISCSI_IBFT_FIND
> + default n
> + help
> + This option enables support for detection and exposing of iSCSI
> + Boot Firmware Table (iBFT) via sysfs to userspace. If you wish to
> + detect iSCSI boot parameters dynamically during system boot, say Y.
> + Otherwise, say N.
> +
> endmenu
> diff --git a/drivers/firmware/Makefile b/drivers/firmware/Makefile
> index 8d4ebc8..4c91471 100644
> --- a/drivers/firmware/Makefile
> +++ b/drivers/firmware/Makefile
> @@ -8,3 +8,5 @@ obj-$(CONFIG_EFI_PCDP) += pcdp.o
> obj-$(CONFIG_DELL_RBU) += dell_rbu.o
> obj-$(CONFIG_DCDBAS) += dcdbas.o
> obj-$(CONFIG_DMIID) += dmi-id.o
> +obj-$(CONFIG_ISCSI_IBFT_FIND) += iscsi_ibft_find.o
> +obj-$(CONFIG_ISCSI_IBFT) += iscsi_ibft.o
> diff --git a/drivers/firmware/iscsi_ibft.c b/drivers/firmware/iscsi_ibft.c
> new file mode 100644
> index 0000000..d668abc
> --- /dev/null
> +++ b/drivers/firmware/iscsi_ibft.c
> @@ -0,0 +1,781 @@
> +/*
> + * Copyright 2007 Red Hat, Inc.
> + * by Peter Jones <pjones@redhat.com>
> + * Copyright 2007 IBM, Inc.
> + * by Konrad Rzeszutek <konradr@us.ibm.com>
> + *
> + * 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.
> + */
> +
> +#include <linux/module.h>
> +#include <linux/string.h>
> +#include <linux/types.h>
> +#include <linux/init.h>
> +#include <linux/stat.h>
> +#include <linux/err.h>
> +#include <linux/ctype.h>
> +#include <linux/slab.h>
> +#include <linux/limits.h>
> +#include <linux/device.h>
> +#include <linux/pci.h>
> +#include <linux/blkdev.h>
> +#include <linux/iscsi_ibft.h>
Is the current include from open-iscsi being duplicated? If not, why
not consolidate in one file?
> +
> +#define IBFT_ISCSI_VERSION "0.4.1"
> +#define IBFT_ISCSI_DATE "2007-Dec-04"
> +
> +MODULE_AUTHOR("Peter Jones <pjones@redhat.com> and \
> +Konrad Rzeszutek <konradr@us.ibm.com>");
> +MODULE_DESCRIPTION("sysfs interface to BIOS iBFT information");
> +MODULE_LICENSE("GPL");
> +MODULE_VERSION(IBFT_ISCSI_VERSION);
> +
> +/*
> + * The kobject different types and its names.
> + *
> +*/
> +enum ibft_id {
> + id_reserved = 0, /* Should never show up */
> + id_control = 1, /* Ditto */
> + id_initiator = 2,
> + id_nic = 3,
> + id_target = 4,
> + id_extensions, /* We don't support. */
> +};
> +
> +static const char *ibft_id_names[] =
> + {"reserved", "control", "initiator", "ethernet%d",
> + "target%d", "extension%d"};
closing null arg.
> +
> +/*
> + * The text attributes names for each of the kobjects.
> +*/
> +enum ibft_eth_properties_enum {
> + ibft_eth_index,
> + ibft_eth_flags,
> + ibft_eth_ip_addr,
> + ibft_eth_subnet_mask,
> + ibft_eth_origin,
> + ibft_eth_gateway,
> + ibft_eth_primary_dns,
> + ibft_eth_secondary_dns,
> + ibft_eth_dhcp,
> + ibft_eth_vlan,
> + ibft_eth_mac,
> + /* ibft_eth_pci_bdf - this is replaced by link to the device itself. */
> + ibft_eth_hostname};
I noticed ibft_eth_hostname gets used as the last marker below.
Wouldn't it be better to have a ibft_eth_count or some such to really
be the last? That way if the elements so change, it still marks the
last element.
> +
> +static const char *ibft_eth_properties[] =
> + {"index", "flags", "ip-addr", "subnet-mask", "origin", "gateway",
> + "primary-dns", "secondary-dns", "dhcp", "vlan", "mac", "hostname"};
> +
null last entry?
> +enum ibft_tgt_properties_enum {
> + ibft_tgt_index,
> + ibft_tgt_flags,
> + ibft_tgt_ip_addr,
> + ibft_tgt_port,
> + ibft_tgt_lun,
> + ibft_tgt_chap_type,
> + ibft_tgt_nic_assoc,
> + ibft_tgt_name,
> + ibft_tgt_chap_name,
> + ibft_tgt_chap_secret,
> + ibft_tgt_rev_chap_name,
> + ibft_tgt_rev_chap_secret};
> +
> +static const char *ibft_tgt_properties[] =
> + {"index", "flags", "ip-addr", "port", "lun", "chap-type", "nic-assoc",
> + "target-name", "chap-name", "chap-secret", "rev-chap-name",
> + "rev-chap-name-secret"};
ditto
> +
> +enum ibft_initiator_properties_enum {
> + ibft_init_index,
> + ibft_init_flags,
> + ibft_init_isns_server,
> + ibft_init_slp_server,
> + ibft_init_pri_radius_server,
> + ibft_init_sec_radius_server,
> + ibft_init_initiator_name};
> +
> +static const char *ibft_initiator_properties[] =
> + {"index", "flags", "isns-server", "slp-server", "pri-radius-server",
> + "sec-radius-server", "initiator-name"};
> +
ditto
> +static LIST_HEAD(ibft_attr_list);
> +static LIST_HEAD(ibft_kobject_list);
> +
> +static const char nulls[16];
> +static struct ibft_table_header *ibft_device;
> +
> +/*
> + * Helper functions to parse data properly.
> + */
> +static ssize_t sprintf_ipaddr(char *buf, u8 *ip)
> +{
> + 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
> + */
> + return sprintf(buf, "%d.%d.%d.%d\n", ip[12],
> + ip[13], ip[14], ip[15]);
> + } else {
> + return 0;
> + }
redundant braces on the else
> +}
> +
> +static ssize_t sprintf_string(char *str, int len, char *buf)
> +{
> + return sprintf(str, "%.*s\n", len, buf);
> +}
> +
> +/*
> + * Helper function to verify the IBFT header.
> + */
> +static int ibft_verify_hdr(struct ibft_hdr *hdr, int id, int length)
> +{
> +#define IBFT_VERIFY_HDR_FIELD(val, name) \
> + if (hdr->val != val) { \
> + printk(KERN_ERR \
> + "error, in IBFT structure (%s) expected %d but" \
> + " found %d\n", \
> + name, val, hdr->val); \
> + return -ENODEV; \
> + }
> + IBFT_VERIFY_HDR_FIELD(id, "ID");
> + IBFT_VERIFY_HDR_FIELD(length, "Length");
> +#undef IBFT_VERIFY_HDR_FIELD
> + return 0;
> +}
> +
> +static void ibft_release(struct kobject *kobj)
> +{
> + struct ibft_kobject *ibft =
> + container_of(kobj, struct ibft_kobject, kobj);
> + kfree(ibft);
> +}
> +
> +/*
> + * Routines for reading of the iBFT data in a human readable fashion.
> + */
> +ssize_t ibft_attr_show_initiator(struct ibft_kobject *entry,
> + struct ibft_attribute *attr,
> + char *buf)
> +{
> + struct ibft_initiator *initiator = entry->initiator;
> + void *ibft_loc = entry->header;
> + char *str = buf;
> +
> + if (!initiator)
> + return 0;
> +
> + switch (attr->type) {
> + case ibft_init_index:
> + str += sprintf(str, "%d\n", initiator->hdr.index);
> + break;
> + case ibft_init_flags:
> + str += sprintf(str, "%d\n", initiator->hdr.flags);
> + break;
> + case ibft_init_isns_server:
> + str += sprintf_ipaddr(str, initiator->isns_server);
> + break;
> + case ibft_init_slp_server:
> + str += sprintf_ipaddr(str, initiator->slp_server);
> + break;
> + case ibft_init_pri_radius_server:
> + str += sprintf_ipaddr(str, initiator->pri_radius_server);
> + break;
> + case ibft_init_sec_radius_server:
> + str += sprintf_ipaddr(str, initiator->sec_radius_server);
> + break;
> + case ibft_init_initiator_name:
> + str += sprintf_string(str, initiator->initiator_name_len,
> + (char *)ibft_loc + initiator->initiator_name_off);
> + break;
> + default:
> + break;
> + }
> +
> + return str - buf;
> +}
> +
> +ssize_t ibft_attr_show_nic(struct ibft_kobject *entry,
> + struct ibft_attribute *attr,
> + char *buf)
> +{
> + struct ibft_nic *nic = entry->nic;
> + void *ibft_loc = entry->header;
> + char *str = buf;
> + char *mac;
> +
> + if (!nic)
> + return 0;
> +
> + switch (attr->type) {
> + case ibft_eth_index:
> + str += sprintf(str, "%d\n", nic->hdr.index);
> + break;
> + case ibft_eth_flags:
> + str += sprintf(str, "%d\n", nic->hdr.flags);
> + break;
> + case ibft_eth_ip_addr:
> + str += sprintf_ipaddr(str, nic->ip_addr);
> + break;
> + case ibft_eth_subnet_mask:
> + str += sprintf(str, "%d\n", nic->subnet_mask_prefix);
> + break;
> + case ibft_eth_origin:
> + str += sprintf(str, "%d\n", nic->origin);
> + break;
> + case ibft_eth_gateway:
> + str += sprintf_ipaddr(str, nic->gateway);
> + break;
> + case ibft_eth_primary_dns:
> + str += sprintf_ipaddr(str, nic->primary_dns);
> + break;
> + case ibft_eth_secondary_dns:
> + str += sprintf_ipaddr(str, nic->secondary_dns);
> + break;
> + case ibft_eth_dhcp:
> + str += sprintf_ipaddr(str, nic->dhcp);
> + break;
> + case ibft_eth_vlan:
> + str += sprintf(str, "%d\n", nic->vlan);
> + break;
> + case ibft_eth_mac:
> + mac = nic->mac;
> + str += sprintf(str, "%02x:%02x:%02x:%02x:%02x:%02x\n",
> + (u8)mac[0], (u8)mac[1], (u8)mac[2],
> + (u8)mac[3], (u8)mac[4], (u8)mac[5]);
> + break;
> + case ibft_eth_hostname:
> + str += sprintf_string(str, nic->hostname_len,
> + (char *)ibft_loc + nic->hostname_off);
> + break;
> + default:
> + break;
> + }
> +
> + return str - buf;
> +};
> +
> +ssize_t ibft_attr_show_target(struct ibft_kobject *entry,
> + struct ibft_attribute *attr,
> + char *buf)
> +{
> + struct ibft_tgt *tgt = entry->tgt;
> + void *ibft_loc = entry->header;
> + char *str = buf;
> + int i;
> +
> + if (!tgt)
> + return 0;
> +
> + switch (attr->type) {
> + case ibft_tgt_index:
> + str += sprintf(str, "%d\n", tgt->hdr.index);
> + break;
> + case ibft_tgt_flags:
> + str += sprintf(str, "%d\n", tgt->hdr.flags);
> + break;
> + case ibft_tgt_ip_addr:
> + str += sprintf_ipaddr(str, tgt->ip_addr);
> + break;
> + case ibft_tgt_port:
> + str += sprintf(str, "%d\n", tgt->port);
> + break;
> + case ibft_tgt_lun:
> + for (i = 0; i < 8; i++)
> + str += sprintf(str, "%x", (u8)tgt->lun[i]);
> + str += sprintf(str, "\n");
> + break;
> + case ibft_tgt_nic_assoc:
> + str += sprintf(str, "%d\n", tgt->nic_assoc);
> + break;
> + case ibft_tgt_chap_type:
> + str += sprintf(str, "%d\n", tgt->chap_type);
> + break;
> + case ibft_tgt_name:
> + str += sprintf_string(str, tgt->tgt_name_len,
> + (void *)ibft_loc + tgt->tgt_name_off);
> + break;
> + case ibft_tgt_chap_name:
> + str += sprintf_string(str, tgt->chap_name_len,
> + (char *)ibft_loc + tgt->chap_name_off);
> + break;
> + case ibft_tgt_chap_secret:
> + str += sprintf_string(str, tgt->chap_secret_len,
> + (char *)ibft_loc + tgt->chap_secret_off);
> + break;
> + case ibft_tgt_rev_chap_name:
> + str += sprintf_string(str, tgt->rev_chap_name_len,
> + (char *)ibft_loc + tgt->rev_chap_name_off);
> + break;
> + case ibft_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;
> +}
> +
> +/*
> + * The main routine which allows the user to read the IBFT data.
> + */
> +static ssize_t ibft_show_attribute(struct kobject *kobj,
> + struct attribute *attr,
> + char *buf)
> +{
> + struct ibft_kobject *dev =
> + container_of(kobj, struct ibft_kobject, kobj);
> + struct ibft_attribute *ibft_attr =
> + container_of(attr, struct ibft_attribute, attr);
> + ssize_t ret = -EIO;
> + char *str = buf;
> +
> + if (!capable(CAP_SYS_ADMIN))
> + return -EACCES;
> +
> + if (ibft_attr->show)
> + ret = ibft_attr->show(dev, ibft_attr, str);
> +
> + return ret;
> +}
> +
> +static struct sysfs_ops ibft_attr_ops = {
> + .show = ibft_show_attribute,
> +};
> +
> +static struct kobj_type ktype_ibft = {
> + .release = ibft_release,
> + .sysfs_ops = &ibft_attr_ops,
> +};
> +
> +static decl_subsys(ibft, &ktype_ibft, NULL);
> +
> +static int ibft_alloc_device(void *idev)
> +{
> + int len;
> + struct ibft_table_header *hdr;
> +
> + if (!idev)
> + return -ENOENT;
> +
> + hdr = (struct ibft_table_header *)phys_to_virt(
> + (unsigned long)ibft_phys);
> + len = hdr->length;
> +
> + ibft_device = kzalloc(len, GFP_KERNEL);
> + if (!ibft_device)
> + return -ENOMEM;
> +
> + memcpy(ibft_device, hdr, len);
> +
> + return 0;
> +}
> +
> +static void ibft_free_device(struct ibft_table_header *hdr)
> +{
> + kfree(hdr);
> +}
> +
> +/*
> + * Helper function for ibft_register_kobjects.
> + */
> +static int ibft_create_kobject(struct ibft_table_header *header,
> + struct ibft_hdr *hdr,
> + struct list_head *list)
> +{
> + int rc = 0;
> + struct ibft_kobject *ibft_kobj = NULL;
> +
> + ibft_kobj = kzalloc(sizeof(*ibft_kobj), GFP_KERNEL);
Is this going to collide with the new kobject semantics?
Subject: [RFC] New kobject/kset/ktype documentation and example code
Message-ID: <20071127230252.GB10038@kroah.com>
> + if (!ibft_kobj)
> + return -ENOMEM;
> +
> + ibft_kobj->header = header;
> + ibft_kobj->hdr = hdr;
> +
> + switch (hdr->id) {
> + case id_initiator:
> + rc = ibft_verify_hdr(hdr, id_initiator,
> + sizeof(*ibft_kobj->initiator));
> + break;
> + case id_nic:
> + rc = ibft_verify_hdr(hdr, id_nic,
> + sizeof(*ibft_kobj->nic));
> + break;
> + case id_target:
> + rc = ibft_verify_hdr(hdr, id_target,
> + sizeof(*ibft_kobj->tgt));
> + break;
> + default:
> + /* Extension field which we don't support. Ignore it */
> + break;
> + }
> +
> + if (!rc) {
> + kobject_set_name(&ibft_kobj->kobj,
> + ibft_id_names[hdr->id],
> + hdr->index);
> +
> + kobj_set_kset_s(ibft_kobj, ibft_subsys);
> +
> + rc = kobject_register(&ibft_kobj->kobj);
> + if (!rc && hdr->id == id_nic) {
> + struct ibft_nic *nic = (struct ibft_nic *)hdr;
> + struct pci_dev *pci_dev = pci_get_bus_and_slot(
> + (nic->pci_bdf & 0xff00) >> 8,
> + (nic->pci_bdf & 0xff));
> + if (pci_dev) {
> + rc = sysfs_create_link(&ibft_kobj->kobj,
> + &pci_dev->dev.kobj, "device");
> + if (rc)
> + kobject_unregister(&ibft_kobj->kobj);
> + pci_dev_put(pci_dev);
> + }
> + }
> + if (!rc)
> + list_add_tail(&ibft_kobj->node, list);
> +
> + }
> + if (rc)
> + 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.
> + */
> +static int ibft_register_kobjects(struct ibft_table_header *header,
> + struct list_head *list)
> +{
> + struct ibft_control *control = NULL;
> + void *ptr, *end;
> + int rc = 0;
> + u16 offset;
> +
> + control = (void *)header + sizeof(*header);
> + end = (void *)control + control->hdr.length;
> +
> + for (ptr = &control->initiator_off; ptr < end; ptr += sizeof(u16)) {
> + offset = *(u16 *)ptr;
> + if (offset && offset < header->length) {
> + rc = ibft_create_kobject(header,
> + (void *)header + offset,
> + list);
> + if (rc)
> + break;
> + }
> + }
> +
> + return rc;
> +}
> +
> +static void ibft_unregister_kobjects(struct list_head *list)
> +{
> + struct ibft_kobject *data = NULL, *n;
> + list_for_each_entry_safe(data, n, list, node) {
> + list_del(&data->node);
> + if (data->hdr->id == id_nic)
> + sysfs_remove_link(&data->kobj, "device");
> + kobject_unregister(&data->kobj);
> + };
> + list_del_init(list);
> +}
> +
> +static int ibft_create_attribute(struct ibft_kobject *kobj_data,
> + int type,
> + const char *name,
> + ssize_t (*show) (struct ibft_kobject *entry,
> + struct ibft_attribute *attr,
> + char *buf),
> + struct list_head *list)
> +{
> + struct ibft_attribute *attr = NULL;
> + struct ibft_hdr *hdr = kobj_data->hdr;
> +
> + attr = kzalloc(sizeof(*attr), GFP_KERNEL);
> + if (!attr)
> + return -ENOMEM;
> +
> + attr->attr.name = name;
> + attr->attr.mode = S_IRUSR;
> + attr->attr.owner = THIS_MODULE;
> +
> + attr->hdr = hdr;
> + attr->show = show;
> + attr->kobj = &kobj_data->kobj;
> + attr->type = type;
> +
> + list_add_tail(&attr->node, list);
> +
> + return 0;
> +}
> +
> +static int ibft_check_nic_for(struct ibft_nic *nic, int entry)
> +{
> + int rc = 0;
> +
> + switch (entry) {
> + case ibft_eth_index:
> + case ibft_eth_flags:
> + rc = 1;
> + break;
> + case ibft_eth_ip_addr:
> + if (!memcmp(nic->dhcp, nulls, sizeof(nic->dhcp)))
> + rc = 1;
> + break;
> + case ibft_eth_subnet_mask:
> + if (!memcmp(nic->dhcp, nulls, sizeof(nic->dhcp)))
> + rc = 1;
> + break;
> + case ibft_eth_origin:
> + rc = 1;
> + break;
> + case ibft_eth_gateway:
> + if (memcmp(nic->gateway, nulls, sizeof(nic->gateway)))
> + rc = 1;
> + break;
> + case ibft_eth_primary_dns:
> + if (memcmp(nic->primary_dns, nulls,
> + sizeof(nic->primary_dns)))
> + rc = 1;
> + break;
> + case ibft_eth_secondary_dns:
> + if (memcmp(nic->secondary_dns, nulls,
> + sizeof(nic->secondary_dns)))
> + rc = 1;
> + break;
> + case ibft_eth_dhcp:
> + if (memcmp(nic->dhcp, nulls, sizeof(nic->dhcp)))
> + rc = 1;
> + break;
> + case ibft_eth_vlan:
> + case ibft_eth_mac:
> + rc = 1;
> + break;
> + case ibft_eth_hostname:
> + if (nic->hostname_off)
> + rc = 1;
> + break;
> + default:
> + break;
> + }
> +
> + return rc;
> +}
> +
> +static int ibft_check_tgt_for(struct ibft_tgt *tgt, int entry)
> +{
> + int rc = 0;
> +
> + switch (entry) {
> + case ibft_tgt_index:
> + case ibft_tgt_flags:
> + case ibft_tgt_ip_addr:
> + case ibft_tgt_port:
> + case ibft_tgt_lun:
> + case ibft_tgt_nic_assoc:
> + case ibft_tgt_chap_type:
> + rc = 1;
> + case ibft_tgt_name:
> + if (tgt->tgt_name_len)
> + rc = 1;
> + break;
> + case ibft_tgt_chap_name:
> + case ibft_tgt_chap_secret:
> + if (tgt->chap_name_len)
> + rc = 1;
> + break;
> + case ibft_tgt_rev_chap_name:
> + case ibft_tgt_rev_chap_secret:
> + if (tgt->rev_chap_name_len)
> + rc = 1;
> + break;
> + default:
> + break;
> + }
> +
> + return rc;
> +}
> +
> +static int ibft_check_initiator_for(struct ibft_initiator *init, int entry)
> +{
> + int rc = 0;
> +
> + switch (entry) {
> + case ibft_init_index:
> + case ibft_init_flags:
> + rc = 1;
> + break;
> + case ibft_init_isns_server:
> + if (memcmp(init->isns_server, nulls,
> + sizeof(init->isns_server)))
> + rc = 1;
> + break;
> + case ibft_init_slp_server:
> + if (memcmp(init->slp_server, nulls,
> + sizeof(init->slp_server)))
> + rc = 1;
> + break;
> + case ibft_init_pri_radius_server:
> + if (memcmp(init->pri_radius_server, nulls,
> + sizeof(init->pri_radius_server)))
> + rc = 1;
> + break;
> + case ibft_init_sec_radius_server:
> + if (memcmp(init->sec_radius_server, nulls,
> + sizeof(init->sec_radius_server)))
> + rc = 1;
> + break;
> + case ibft_init_initiator_name:
> + if (init->initiator_name_len)
> + rc = 1;
> + break;
> + default:
> + break;
> + }
> +
> + return rc;
> +}
> +
> +/*
> + * Register the attributes for all of the kobjects.
> + */
> +static int ibft_register_attributes(struct list_head *kobject_list,
> + struct list_head *attr_list)
> +{
> + int rc = 0, i = 0;
> + struct ibft_kobject *data = NULL;
> + struct ibft_attribute *attr = NULL, *m;
> +
> + list_for_each_entry(data, kobject_list, node) {
> + switch (data->hdr->id) {
> + case id_nic:
> + for (i = 0; i <= ibft_eth_hostname && !rc; i++)
> + if (ibft_check_nic_for(data->nic, i))
> + rc = ibft_create_attribute(data, i,
> + ibft_eth_properties[i],
> + ibft_attr_show_nic, attr_list);
> + break;
> + case id_target:
> + for (i = 0; i <= ibft_tgt_rev_chap_secret && !rc; i++)
> + if (ibft_check_tgt_for(data->tgt, i))
> + rc = ibft_create_attribute(data, i,
> + ibft_tgt_properties[i],
> + ibft_attr_show_target,
> + attr_list);
> + break;
> + case id_initiator:
> + for (i = 0; i <= ibft_init_initiator_name && !rc; i++)
> + if (ibft_check_initiator_for(
> + data->initiator, i))
> + rc = ibft_create_attribute(data, i,
> + ibft_initiator_properties[i],
> + ibft_attr_show_initiator,
> + attr_list);
> + break;
> + default:
> + break;
> + }
> + if (rc)
> + break;
> + }
> + list_for_each_entry_safe(attr, m, attr_list, node) {
> + rc = sysfs_create_file(attr->kobj, &attr->attr);
> + if (rc) {
> + list_del(&attr->node);
> + kfree(attr);
> + break;
> + }
> + }
> +
> + return rc;
> +}
> +
> +static void ibft_unregister_attributes(struct list_head *list)
> +{
> + struct ibft_attribute *attr = NULL, *m;
> +
> + list_for_each_entry_safe(attr, m, list, node) {
> + sysfs_remove_file(attr->kobj, &attr->attr);
> + list_del(&attr->node);
> + kfree(attr);
> + }
> + list_del_init(list);
> +}
> +
> +/*
> + * ibft_init() - creates sysfs tree entries for iBFT data.
> + */
> +static int __init ibft_init(void)
> +{
> + int rc = 0;
> +
> + if (!ibft_phys)
> + find_ibft();
> +
> + rc = firmware_register(&ibft_subsys);
> + if (rc)
> + return rc;
> +
> + if (ibft_phys) {
> + printk(KERN_INFO "iBFT detected at 0x%lx.\n",
> + (unsigned long)ibft_phys);
> +
> + rc = ibft_alloc_device(ibft_phys);
> + if (rc)
> + goto out_firmware_unregister;
> +
> + /* Scan the IBFT for data and register kobjects. */
> + rc = ibft_register_kobjects(ibft_device, &ibft_kobject_list);
> + if (rc)
> + goto out_free;
> +
> + /* Register the attributes */
> + rc = ibft_register_attributes(&ibft_kobject_list,
> + &ibft_attr_list);
> + if (rc)
> + goto out_free;
> + } else
> + printk(KERN_INFO "No iBFT detected.\n");
> +
> + return 0;
> +
> +out_free:
> + ibft_unregister_attributes(&ibft_attr_list);
> + ibft_unregister_kobjects(&ibft_kobject_list);
> + ibft_free_device(ibft_device);
> + ibft_device = NULL;
> +out_firmware_unregister:
> + firmware_unregister(&ibft_subsys);
> + return rc;
> +}
> +
> +static void __exit ibft_exit(void)
> +{
> + ibft_unregister_attributes(&ibft_attr_list);
> + ibft_unregister_kobjects(&ibft_kobject_list);
> + ibft_free_device(ibft_device);
> + ibft_device = NULL;
> + firmware_unregister(&ibft_subsys);
> +}
> +
> +module_init(ibft_init);
> +module_exit(ibft_exit);
> diff --git a/drivers/firmware/iscsi_ibft_find.c b/drivers/firmware/iscsi_ibft_find.c
> new file mode 100644
> index 0000000..c51685a
> --- /dev/null
> +++ b/drivers/firmware/iscsi_ibft_find.c
> @@ -0,0 +1,78 @@
> +/*
> + * Copyright 2007 Red Hat, Inc.
> + * by Peter Jones <pjones@redhat.com>
> + * Copyright 2007 IBM, Inc.
> + * by Konrad Rzeszutek <konradr@us.ibm.com>
> + *
> + * This code finds the iSCSI Boot Format Table.
> + *
> + * 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.
> + */
> +
> +#include <linux/module.h>
> +#include <linux/string.h>
> +#include <linux/types.h>
> +#include <linux/ctype.h>
> +#include <linux/init.h>
> +#include <linux/stat.h>
> +#include <linux/err.h>
> +#include <linux/slab.h>
> +#include <linux/limits.h>
> +#include <linux/device.h>
> +#include <linux/pci.h>
> +#include <linux/blkdev.h>
> +#include <linux/iscsi_ibft.h>
> +
> +
> +/*
> + * Physical location of iSCSI Boot Format Table.
> + */
> +void *ibft_phys;
> +EXPORT_SYMBOL(ibft_phys);
> +
> +#define IBFT_SIGN "iBFT"
> +#define IBFT_SIGN_LEN 4
> +#define IBFT_START 0x80000 /* 512kB */
> +#define IBFT_END 0x100000 /* 1MB */
> +#define VGA_MEM 0xA0000 /* VGA buffer */
> +#define VGA_SIZE 0x20000 /* 128kB */
> +
> +
> +/*
> + * Routine used to find the iSCSI Boot Format Table. the physical
> + * location is set in the ibft_phys variable. The return value is
> + * the size of IBFT.
> + */
> +ssize_t find_ibft(void)
> +{
> + unsigned long pos;
> +
> + for (pos = IBFT_START; pos < IBFT_END; pos += 16) {
> + void *virt;
> + /* The table can't be inside the VGA BIOS reserved space,
> + * so skip that area */
> + if (pos == VGA_MEM)
> + pos += VGA_SIZE;
> + virt = phys_to_virt(pos);
> + if (memcmp(virt, IBFT_SIGN, IBFT_SIGN_LEN) == 0) {
> + unsigned long *addr =
> + (unsigned long *)phys_to_virt(pos + 4);
> + unsigned int len = *addr;
> + /* if the length of the table extends past 1M,
> + * the table cannot be valid. */
> + if (pos + len <= (IBFT_END-1)) {
> + ibft_phys = (void *)pos;
> + return len;
> + }
> + }
> + }
> + return 0;
> +}
> +EXPORT_SYMBOL(find_ibft);
> diff --git a/include/linux/iscsi_ibft.h b/include/linux/iscsi_ibft.h
> new file mode 100644
> index 0000000..420f621
> --- /dev/null
> +++ b/include/linux/iscsi_ibft.h
> @@ -0,0 +1,126 @@
> +#ifndef ISCSI_IBFT_H
> +#define ISCSI_IBFT_H
missing copyright or left. :)
> +
> +/*
> + * Physical location of iSCSI Boot Format Table.
> + */
> +extern void *ibft_phys;
> +
> +/*
> + * Routine used to find the iSCSI Boot Format Table. The physical
> + * location is set in the ibft_phys variable. The return value is the
> + * size of IBFT.
> + */
> +extern ssize_t find_ibft(void);
> +
> +#if defined(CONFIG_ISCSI_IBFT) || defined(CONFIG_ISCSI_IBFT_MODULE)
> +
> +struct ibft_table_header {
> + char signature[4];
> + u32 length;
> + u8 revision;
> + u8 checksum;
> + char oem_id[6];
> + char oem_table_id[8];
> + char reserved[24];
> +} __attribute__((__packed__));
> +
> +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 and attribute structures.
> + */
> +
> +struct ibft_kobject {
> + struct ibft_table_header *header;
> + union {
> + struct ibft_initiator *initiator;
> + struct ibft_nic *nic;
> + struct ibft_tgt *tgt;
> + struct ibft_hdr *hdr;
> + };
> + struct kobject kobj;
> + struct list_head node;
> +};
> +
> +struct ibft_attribute {
> + struct attribute attr;
> + ssize_t (*show) (struct ibft_kobject *entry,
> + struct ibft_attribute *attr, char *buf);
> + union {
> + struct ibft_initiator *initiator;
> + struct ibft_nic *nic;
> + struct ibft_tgt *tgt;
> + struct ibft_hdr *hdr;
> + };
> + struct kobject *kobj;
> + int type; /* The enum of the type. This can be any value off:
> + ibft_eth_properties_enum, ibft_tgt_properties_enum,
> + or ibft_initiator_properties_enum. */
> + struct list_head node;
> +};
> +
> +#endif
> +
> +#endif /* ISCSI_IBFT_H */
> --
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at http://www.tux.org/lkml/
>
^ permalink raw reply [flat|nested] 2+ messages in thread* [PATCH] Add iSCSI IBFT support (v0.4.2)
2007-12-05 3:12 ` Doug Maxey
@ 2007-12-05 19:47 ` Konrad Rzeszutek
2007-12-21 20:05 ` Greg KH
0 siblings, 1 reply; 2+ messages in thread
From: Konrad Rzeszutek @ 2007-12-05 19:47 UTC (permalink / raw)
To: Doug Maxey
Cc: darnok, linux-kernel, pjones, konradr, konradr, greg,
randy.dunlap, hpa, lenb, mike.anderson, dwm, Arjan van de Ven
On Tue, Dec 04, 2007 at 09:12:11PM -0600, Doug Maxey wrote:
> Overall, looks nice. Good work.
Thank you.
>
> comments inline below...
>
> On Tue, 04 Dec 2007 20:44:19 -0400, darnok@68k.org wrote:
> > On Wed, Nov 28, 2007 at 07:34:22PM -0400, Konrad Rzeszutek wrote:
> > >
> > > This patch adds /sysfs/firmware/ibft/[initiator|targetX|ethernetX]
> > > directories along with text properties which export the the iSCSI Boot
> > > Firmware Table (iBFT) structure.
> > >
> > > What is iSCSI Boot Firmware Table? It is a mechanism for the iSCSI
> > > tools to extract from the machine NICs the iSCSI connection information
> > > so that they can automagically mount the iSCSI share/target. Currently
> > > the iSCSI information is hard-coded in the initrd.
> > >
> > > For full details of the IBFT structure please take a look at:
> > > ftp://ftp.software.ibm.com/systems/support/system_x_pdf/ibm_iscsi_boot_firmware_table_v1.02.pdf
> >
> > Here is an updated version which provides an attribute symlink (in the
> > ethernetX directory) called 'device' to the NIC device, instead of
> > exporting a 'pci_bdf' file which had the "bus:slot:func" values.
> >
> > Review would be much appreciated.
This next version (0.4.2) includes: much better error unrolling
when kobject registration fails, fixes from Doug's review, and uses the
'kset_create_and_add' API that Greg KH posted. It has been tested on
todays 2.6.24-rc4-gkh tree.
Signed-off-by: Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
diff --git a/Documentation/ABI/testing/sysfs-ibft b/Documentation/ABI/testing/sysfs-ibft
new file mode 100644
index 0000000..4898740
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-ibft
@@ -0,0 +1,31 @@
+What: /sys/firmware/ibft/initiator
+Date: November 2007
+Contact: Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
+Description: The /sys/firmware/ibft/initiator directory will contain
+ files that expose the iSCSI Boot Firmware Table initiator data.
+ Usually this contains the Initiator name.
+
+What: /sys/firmware/ibft/targetX
+Date: November 2007
+Contact: Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
+Description: The /sys/firmware/ibft/targetX directory will contain
+ files that expose the iSCSI Boot Firmware Table target data.
+ Usually this contains the target's IP address, boot LUN,
+ target name, and what NIC it is associated with. It can also
+ contain the CHAP name (and password), the reverse CHAP
+ name (and password)
+
+What: /sys/firmware/ibft/ethernetX
+Date: November 2007
+Contact: Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
+Description: The /sys/firmware/ibft/ethernetX directory will contain
+ files that expose the iSCSI Boot Firmware Table NIC data.
+ This can this can the IP address, MAC, and gateway of the NIC.
+
+What: /sys/firmware/ibft/extensionX
+Date: November 2007
+Contact: Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
+Description: The /sys/firmware/ibft/extensionX directory will contain
+ files that expose the iSCSI Boot Firmware Table extension data.
+ The extended data structure is not supported so there would be
+ no files in this directory.
diff --git a/arch/x86/kernel/setup_32.c b/arch/x86/kernel/setup_32.c
index e1e18c3..7c36a28 100644
--- a/arch/x86/kernel/setup_32.c
+++ b/arch/x86/kernel/setup_32.c
@@ -39,6 +39,7 @@
#include <linux/efi.h>
#include <linux/init.h>
#include <linux/edd.h>
+#include <linux/iscsi_ibft.h>
#include <linux/nodemask.h>
#include <linux/kexec.h>
#include <linux/crash_dump.h>
@@ -148,6 +149,20 @@ static inline void copy_edd(void)
}
#endif
+#if defined(CONFIG_ISCSI_IBFT_FIND)
+static void __init reserve_ibft_region(void)
+{
+ unsigned int ibft_len;
+
+ ibft_len = find_ibft();
+ if (ibft_len)
+ reserve_bootmem((unsigned int)ibft_phys,
+ PAGE_ALIGN(ibft_len));
+}
+#else
+static void __init reserve_ibft_region(void) { }
+#endif
+
int __initdata user_defined_memmap = 0;
/*
@@ -496,6 +511,7 @@ void __init setup_bootmem_allocator(void)
}
#endif
reserve_crashkernel();
+ reserve_ibft_region();
}
/*
diff --git a/arch/x86/kernel/setup_64.c b/arch/x86/kernel/setup_64.c
index 30d94d1..d5b73c6 100644
--- a/arch/x86/kernel/setup_64.c
+++ b/arch/x86/kernel/setup_64.c
@@ -33,6 +33,7 @@
#include <linux/acpi.h>
#include <linux/kallsyms.h>
#include <linux/edd.h>
+#include <linux/iscsi_ibft.h>
#include <linux/mmzone.h>
#include <linux/kexec.h>
#include <linux/cpufreq.h>
@@ -198,6 +199,20 @@ static inline void copy_edd(void)
}
#endif
+#if defined(CONFIG_ISCSI_IBFT_FIND)
+static void __init reserve_ibft_region(void)
+{
+ unsigned int ibft_len;
+
+ ibft_len = find_ibft();
+ if (ibft_len)
+ reserve_bootmem_generic((unsigned long)ibft_phys,
+ PAGE_ALIGN(ibft_len));
+}
+#else
+static void __init reserve_ibft_region(void) { }
+#endif
+
#ifdef CONFIG_KEXEC
static void __init reserve_crashkernel(void)
{
@@ -403,6 +418,7 @@ void __init setup_arch(char **cmdline_p)
}
#endif
reserve_crashkernel();
+ reserve_ibft_region();
paging_init();
#ifdef CONFIG_PCI
diff --git a/drivers/firmware/Kconfig b/drivers/firmware/Kconfig
index 05f02a3..e2f7208 100644
--- a/drivers/firmware/Kconfig
+++ b/drivers/firmware/Kconfig
@@ -93,4 +93,23 @@ config DMIID
information from userspace through /sys/class/dmi/id/ or if you want
DMI-based module auto-loading.
+config ISCSI_IBFT_FIND
+ bool "iSCSI Boot Firmware Table Attributes"
+ default n
+ help
+ This option enables the kernel to find the region of memory
+ in which the ISCSI Boot Firmware Table (iBFT) resides. This
+ is necessary for iSCSI Boot Firmware Table Attributes module to work
+ properly.
+
+config ISCSI_IBFT
+ tristate "iSCSI Boot Firmware Table Attributes module"
+ depends on ISCSI_IBFT_FIND
+ default n
+ help
+ This option enables support for detection and exposing of iSCSI
+ Boot Firmware Table (iBFT) via sysfs to userspace. If you wish to
+ detect iSCSI boot parameters dynamically during system boot, say Y.
+ Otherwise, say N.
+
endmenu
diff --git a/drivers/firmware/Makefile b/drivers/firmware/Makefile
index 8d4ebc8..4c91471 100644
--- a/drivers/firmware/Makefile
+++ b/drivers/firmware/Makefile
@@ -8,3 +8,5 @@ obj-$(CONFIG_EFI_PCDP) += pcdp.o
obj-$(CONFIG_DELL_RBU) += dell_rbu.o
obj-$(CONFIG_DCDBAS) += dcdbas.o
obj-$(CONFIG_DMIID) += dmi-id.o
+obj-$(CONFIG_ISCSI_IBFT_FIND) += iscsi_ibft_find.o
+obj-$(CONFIG_ISCSI_IBFT) += iscsi_ibft.o
diff --git a/drivers/firmware/iscsi_ibft.c b/drivers/firmware/iscsi_ibft.c
new file mode 100644
index 0000000..cf69092
--- /dev/null
+++ b/drivers/firmware/iscsi_ibft.c
@@ -0,0 +1,807 @@
+/*
+ * Copyright 2007 Red Hat, Inc.
+ * by Peter Jones <pjones@redhat.com>
+ * Copyright 2007 IBM, Inc.
+ * by Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
+ *
+ * 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.
+ */
+
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/stat.h>
+#include <linux/err.h>
+#include <linux/ctype.h>
+#include <linux/slab.h>
+#include <linux/limits.h>
+#include <linux/device.h>
+#include <linux/pci.h>
+#include <linux/blkdev.h>
+#include <linux/iscsi_ibft.h>
+
+#define IBFT_ISCSI_VERSION "0.4.2"
+#define IBFT_ISCSI_DATE "2007-Dec-05"
+
+MODULE_AUTHOR("Peter Jones <pjones@redhat.com> and \
+Konrad Rzeszutek <konradr@us.ibm.com>");
+MODULE_DESCRIPTION("sysfs interface to BIOS iBFT information");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(IBFT_ISCSI_VERSION);
+
+/*
+ * The kobject different types and its names.
+ *
+*/
+enum ibft_id {
+ id_reserved = 0, /* Should never show up */
+ id_control = 1, /* Ditto */
+ id_initiator = 2,
+ id_nic = 3,
+ id_target = 4,
+ id_extensions, /* We don't support. */
+};
+
+static const char *ibft_id_names[] =
+ {"reserved", "control", "initiator", "ethernet%d",
+ "target%d", "extension%d", NULL};
+
+/*
+ * The text attributes names for each of the kobjects.
+*/
+enum ibft_eth_properties_enum {
+ ibft_eth_index,
+ ibft_eth_flags,
+ ibft_eth_ip_addr,
+ ibft_eth_subnet_mask,
+ ibft_eth_origin,
+ ibft_eth_gateway,
+ ibft_eth_primary_dns,
+ ibft_eth_secondary_dns,
+ ibft_eth_dhcp,
+ ibft_eth_vlan,
+ ibft_eth_mac,
+ /* ibft_eth_pci_bdf - this is replaced by link to the device itself. */
+ ibft_eth_hostname,
+ ibft_eth_end_marker};
+
+static const char *ibft_eth_properties[] =
+ {"index", "flags", "ip-addr", "subnet-mask", "origin", "gateway",
+ "primary-dns", "secondary-dns", "dhcp", "vlan", "mac", "hostname",
+ NULL};
+
+enum ibft_tgt_properties_enum {
+ ibft_tgt_index,
+ ibft_tgt_flags,
+ ibft_tgt_ip_addr,
+ ibft_tgt_port,
+ ibft_tgt_lun,
+ ibft_tgt_chap_type,
+ ibft_tgt_nic_assoc,
+ ibft_tgt_name,
+ ibft_tgt_chap_name,
+ ibft_tgt_chap_secret,
+ ibft_tgt_rev_chap_name,
+ ibft_tgt_rev_chap_secret,
+ ibft_tgt_end_marker};
+
+static const char *ibft_tgt_properties[] =
+ {"index", "flags", "ip-addr", "port", "lun", "chap-type", "nic-assoc",
+ "target-name", "chap-name", "chap-secret", "rev-chap-name",
+ "rev-chap-name-secret", NULL};
+
+enum ibft_initiator_properties_enum {
+ ibft_init_index,
+ ibft_init_flags,
+ ibft_init_isns_server,
+ ibft_init_slp_server,
+ ibft_init_pri_radius_server,
+ ibft_init_sec_radius_server,
+ ibft_init_initiator_name,
+ ibft_init_end_marker};
+
+static const char *ibft_initiator_properties[] =
+ {"index", "flags", "isns-server", "slp-server", "pri-radius-server",
+ "sec-radius-server", "initiator-name", NULL};
+
+static LIST_HEAD(ibft_attr_list);
+static LIST_HEAD(ibft_kobject_list);
+
+static const char nulls[16];
+static struct ibft_table_header *ibft_device;
+
+/*
+ * Helper functions to parse data properly.
+ */
+static ssize_t sprintf_ipaddr(char *buf, u8 *ip)
+{
+ 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
+ */
+ return sprintf(buf, "%d.%d.%d.%d\n", ip[12],
+ ip[13], ip[14], ip[15]);
+ } else
+ return 0;
+}
+
+static ssize_t sprintf_string(char *str, int len, char *buf)
+{
+ return sprintf(str, "%.*s\n", len, buf);
+}
+
+/*
+ * Helper function to verify the IBFT header.
+ */
+static int ibft_verify_hdr(struct ibft_hdr *hdr, int id, int length)
+{
+#define IBFT_VERIFY_HDR_FIELD(val, name) \
+ if (hdr->val != val) { \
+ printk(KERN_ERR \
+ "error, in IBFT structure (%s) expected %d but" \
+ " found %d\n", \
+ name, val, hdr->val); \
+ return -ENODEV; \
+ }
+ IBFT_VERIFY_HDR_FIELD(id, "ID");
+ IBFT_VERIFY_HDR_FIELD(length, "Length");
+#undef IBFT_VERIFY_HDR_FIELD
+ return 0;
+}
+
+static void ibft_release(struct kobject *kobj)
+{
+ struct ibft_kobject *ibft =
+ container_of(kobj, struct ibft_kobject, kobj);
+ kfree(ibft);
+}
+
+/*
+ * Routines for reading of the iBFT data in a human readable fashion.
+ */
+ssize_t ibft_attr_show_initiator(struct ibft_kobject *entry,
+ struct ibft_attribute *attr,
+ char *buf)
+{
+ struct ibft_initiator *initiator = entry->initiator;
+ void *ibft_loc = entry->header;
+ char *str = buf;
+
+ if (!initiator)
+ return 0;
+
+ switch (attr->type) {
+ case ibft_init_index:
+ str += sprintf(str, "%d\n", initiator->hdr.index);
+ break;
+ case ibft_init_flags:
+ str += sprintf(str, "%d\n", initiator->hdr.flags);
+ break;
+ case ibft_init_isns_server:
+ str += sprintf_ipaddr(str, initiator->isns_server);
+ break;
+ case ibft_init_slp_server:
+ str += sprintf_ipaddr(str, initiator->slp_server);
+ break;
+ case ibft_init_pri_radius_server:
+ str += sprintf_ipaddr(str, initiator->pri_radius_server);
+ break;
+ case ibft_init_sec_radius_server:
+ str += sprintf_ipaddr(str, initiator->sec_radius_server);
+ break;
+ case ibft_init_initiator_name:
+ str += sprintf_string(str, initiator->initiator_name_len,
+ (char *)ibft_loc + initiator->initiator_name_off);
+ break;
+ default:
+ break;
+ }
+
+ return str - buf;
+}
+
+ssize_t ibft_attr_show_nic(struct ibft_kobject *entry,
+ struct ibft_attribute *attr,
+ char *buf)
+{
+ struct ibft_nic *nic = entry->nic;
+ void *ibft_loc = entry->header;
+ char *str = buf;
+ char *mac;
+
+ if (!nic)
+ return 0;
+
+ switch (attr->type) {
+ case ibft_eth_index:
+ str += sprintf(str, "%d\n", nic->hdr.index);
+ break;
+ case ibft_eth_flags:
+ str += sprintf(str, "%d\n", nic->hdr.flags);
+ break;
+ case ibft_eth_ip_addr:
+ str += sprintf_ipaddr(str, nic->ip_addr);
+ break;
+ case ibft_eth_subnet_mask:
+ str += sprintf(str, "%d\n", nic->subnet_mask_prefix);
+ break;
+ case ibft_eth_origin:
+ str += sprintf(str, "%d\n", nic->origin);
+ break;
+ case ibft_eth_gateway:
+ str += sprintf_ipaddr(str, nic->gateway);
+ break;
+ case ibft_eth_primary_dns:
+ str += sprintf_ipaddr(str, nic->primary_dns);
+ break;
+ case ibft_eth_secondary_dns:
+ str += sprintf_ipaddr(str, nic->secondary_dns);
+ break;
+ case ibft_eth_dhcp:
+ str += sprintf_ipaddr(str, nic->dhcp);
+ break;
+ case ibft_eth_vlan:
+ str += sprintf(str, "%d\n", nic->vlan);
+ break;
+ case ibft_eth_mac:
+ mac = nic->mac;
+ str += sprintf(str, "%02x:%02x:%02x:%02x:%02x:%02x\n",
+ (u8)mac[0], (u8)mac[1], (u8)mac[2],
+ (u8)mac[3], (u8)mac[4], (u8)mac[5]);
+ break;
+ case ibft_eth_hostname:
+ str += sprintf_string(str, nic->hostname_len,
+ (char *)ibft_loc + nic->hostname_off);
+ break;
+ default:
+ break;
+ }
+
+ return str - buf;
+};
+
+ssize_t ibft_attr_show_target(struct ibft_kobject *entry,
+ struct ibft_attribute *attr,
+ char *buf)
+{
+ struct ibft_tgt *tgt = entry->tgt;
+ void *ibft_loc = entry->header;
+ char *str = buf;
+ int i;
+
+ if (!tgt)
+ return 0;
+
+ switch (attr->type) {
+ case ibft_tgt_index:
+ str += sprintf(str, "%d\n", tgt->hdr.index);
+ break;
+ case ibft_tgt_flags:
+ str += sprintf(str, "%d\n", tgt->hdr.flags);
+ break;
+ case ibft_tgt_ip_addr:
+ str += sprintf_ipaddr(str, tgt->ip_addr);
+ break;
+ case ibft_tgt_port:
+ str += sprintf(str, "%d\n", tgt->port);
+ break;
+ case ibft_tgt_lun:
+ for (i = 0; i < 8; i++)
+ str += sprintf(str, "%x", (u8)tgt->lun[i]);
+ str += sprintf(str, "\n");
+ break;
+ case ibft_tgt_nic_assoc:
+ str += sprintf(str, "%d\n", tgt->nic_assoc);
+ break;
+ case ibft_tgt_chap_type:
+ str += sprintf(str, "%d\n", tgt->chap_type);
+ break;
+ case ibft_tgt_name:
+ str += sprintf_string(str, tgt->tgt_name_len,
+ (void *)ibft_loc + tgt->tgt_name_off);
+ break;
+ case ibft_tgt_chap_name:
+ str += sprintf_string(str, tgt->chap_name_len,
+ (char *)ibft_loc + tgt->chap_name_off);
+ break;
+ case ibft_tgt_chap_secret:
+ str += sprintf_string(str, tgt->chap_secret_len,
+ (char *)ibft_loc + tgt->chap_secret_off);
+ break;
+ case ibft_tgt_rev_chap_name:
+ str += sprintf_string(str, tgt->rev_chap_name_len,
+ (char *)ibft_loc + tgt->rev_chap_name_off);
+ break;
+ case ibft_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;
+}
+
+/*
+ * The main routine which allows the user to read the IBFT data.
+ */
+static ssize_t ibft_show_attribute(struct kobject *kobj,
+ struct attribute *attr,
+ char *buf)
+{
+ struct ibft_kobject *dev =
+ container_of(kobj, struct ibft_kobject, kobj);
+ struct ibft_attribute *ibft_attr =
+ container_of(attr, struct ibft_attribute, attr);
+ ssize_t ret = -EIO;
+ char *str = buf;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EACCES;
+
+ if (ibft_attr->show)
+ ret = ibft_attr->show(dev, ibft_attr, str);
+
+ return ret;
+}
+
+static struct sysfs_ops ibft_attr_ops = {
+ .show = ibft_show_attribute,
+};
+
+static struct kobj_type ibft_ktype = {
+ .release = ibft_release,
+ .sysfs_ops = &ibft_attr_ops,
+};
+
+static struct kset *ibft_kset;
+
+static int ibft_alloc_device(void *idev)
+{
+ int len;
+ struct ibft_table_header *hdr;
+
+ if (!idev)
+ return -ENOENT;
+
+ hdr = (struct ibft_table_header *)phys_to_virt(
+ (unsigned long)ibft_phys);
+ len = hdr->length;
+
+ ibft_device = kzalloc(len, GFP_KERNEL);
+ if (!ibft_device)
+ return -ENOMEM;
+
+ memcpy(ibft_device, hdr, len);
+
+ return 0;
+}
+
+static void ibft_free_device(struct ibft_table_header *hdr)
+{
+ kfree(hdr);
+}
+
+/*
+ * Helper function for ibft_register_kobjects.
+ */
+static int ibft_create_kobject(struct ibft_table_header *header,
+ struct ibft_hdr *hdr,
+ struct list_head *list)
+{
+ int rc = 0;
+ struct ibft_kobject *ibft_kobj = NULL;
+
+ 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(hdr, id_initiator,
+ sizeof(*ibft_kobj->initiator));
+ break;
+ case id_nic:
+ rc = ibft_verify_hdr(hdr, id_nic,
+ sizeof(*ibft_kobj->nic));
+ break;
+ case id_target:
+ rc = ibft_verify_hdr(hdr, id_target,
+ sizeof(*ibft_kobj->tgt));
+ break;
+ default:
+ /* Extension field which we don't support. Ignore it */
+ break;
+ }
+
+ if (rc) {
+ kfree(ibft_kobj);
+ goto out;
+ }
+
+ /* kobject fief. We will let the reference counter do the job
+ of deleting the structure (and its name) if we fail here. */
+ ibft_kobj->kobj.kset = ibft_kset;
+ ibft_kobj->kobj.ktype = &ibft_ktype;
+
+ rc = kobject_set_name(&ibft_kobj->kobj,
+ ibft_id_names[hdr->id],
+ hdr->index);
+
+ if (rc)
+ goto kobject_do_put;
+
+ kobject_init(&ibft_kobj->kobj);
+
+ rc = kobject_add(&ibft_kobj->kobj);
+ if (rc)
+ goto kobject_do_put;
+
+ rc = kobject_uevent(&ibft_kobj->kobj, KOBJ_ADD);
+ if (rc)
+ goto kobject_do_del;
+
+ if (hdr->id == id_nic) {
+ struct ibft_nic *nic = (struct ibft_nic *)hdr;
+ struct pci_dev *pci_dev = pci_get_bus_and_slot(
+ (nic->pci_bdf & 0xff00) >> 8,
+ (nic->pci_bdf & 0xff));
+ if (pci_dev) {
+ rc = sysfs_create_link(&ibft_kobj->kobj,
+ &pci_dev->dev.kobj, "device");
+ pci_dev_put(pci_dev);
+ }
+ }
+
+ if (!rc) {
+ /* Nothing broke so lets add it to the list. */
+ list_add_tail(&ibft_kobj->node, list);
+ goto out;
+ }
+
+ kobject_uevent(&ibft_kobj->kobj, KOBJ_REMOVE);
+kobject_do_del:
+ kobject_del(&ibft_kobj->kobj);
+kobject_do_put:
+ kobject_put(&ibft_kobj->kobj);
+out:
+ return rc;
+}
+
+/*
+ * Scan the IBFT table structure for the NIC and Target fields. When
+ * found add them on the passed-in list.
+ */
+static int ibft_register_kobjects(struct ibft_table_header *header,
+ struct list_head *list)
+{
+ struct ibft_control *control = NULL;
+ void *ptr, *end;
+ int rc = 0;
+ u16 offset;
+
+ control = (void *)header + sizeof(*header);
+ end = (void *)control + control->hdr.length;
+
+ for (ptr = &control->initiator_off; ptr < end; ptr += sizeof(u16)) {
+ offset = *(u16 *)ptr;
+ if (offset && offset < header->length) {
+ rc = ibft_create_kobject(header,
+ (void *)header + offset,
+ list);
+ if (rc)
+ break;
+ }
+ }
+
+ return rc;
+}
+
+static void ibft_unregister_kobjects(struct list_head *list)
+{
+ struct ibft_kobject *data = NULL, *n;
+ list_for_each_entry_safe(data, n, list, node) {
+ list_del(&data->node);
+ if (data->hdr->id == id_nic)
+ sysfs_remove_link(&data->kobj, "device");
+ kobject_uevent(&data->kobj, KOBJ_REMOVE);
+ kobject_del(&data->kobj);
+ kobject_put(&data->kobj);
+ };
+ list_del_init(list);
+}
+
+static int ibft_create_attribute(struct ibft_kobject *kobj_data,
+ int type,
+ const char *name,
+ ssize_t (*show) (struct ibft_kobject *entry,
+ struct ibft_attribute *attr,
+ char *buf),
+ struct list_head *list)
+{
+ struct ibft_attribute *attr = NULL;
+ struct ibft_hdr *hdr = kobj_data->hdr;
+
+ attr = kzalloc(sizeof(*attr), GFP_KERNEL);
+ if (!attr)
+ return -ENOMEM;
+
+ attr->attr.name = name;
+ attr->attr.mode = S_IRUSR;
+ attr->attr.owner = THIS_MODULE;
+
+ attr->hdr = hdr;
+ attr->show = show;
+ attr->kobj = &kobj_data->kobj;
+ attr->type = type;
+
+ list_add_tail(&attr->node, list);
+
+ return 0;
+}
+
+static int ibft_check_nic_for(struct ibft_nic *nic, int entry)
+{
+ int rc = 0;
+
+ switch (entry) {
+ case ibft_eth_index:
+ case ibft_eth_flags:
+ rc = 1;
+ break;
+ case ibft_eth_ip_addr:
+ if (!memcmp(nic->dhcp, nulls, sizeof(nic->dhcp)))
+ rc = 1;
+ break;
+ case ibft_eth_subnet_mask:
+ if (!memcmp(nic->dhcp, nulls, sizeof(nic->dhcp)))
+ rc = 1;
+ break;
+ case ibft_eth_origin:
+ rc = 1;
+ break;
+ case ibft_eth_gateway:
+ if (memcmp(nic->gateway, nulls, sizeof(nic->gateway)))
+ rc = 1;
+ break;
+ case ibft_eth_primary_dns:
+ if (memcmp(nic->primary_dns, nulls,
+ sizeof(nic->primary_dns)))
+ rc = 1;
+ break;
+ case ibft_eth_secondary_dns:
+ if (memcmp(nic->secondary_dns, nulls,
+ sizeof(nic->secondary_dns)))
+ rc = 1;
+ break;
+ case ibft_eth_dhcp:
+ if (memcmp(nic->dhcp, nulls, sizeof(nic->dhcp)))
+ rc = 1;
+ break;
+ case ibft_eth_vlan:
+ case ibft_eth_mac:
+ rc = 1;
+ break;
+ case ibft_eth_hostname:
+ if (nic->hostname_off)
+ rc = 1;
+ break;
+ default:
+ break;
+ }
+
+ return rc;
+}
+
+static int ibft_check_tgt_for(struct ibft_tgt *tgt, int entry)
+{
+ int rc = 0;
+
+ switch (entry) {
+ case ibft_tgt_index:
+ case ibft_tgt_flags:
+ case ibft_tgt_ip_addr:
+ case ibft_tgt_port:
+ case ibft_tgt_lun:
+ case ibft_tgt_nic_assoc:
+ case ibft_tgt_chap_type:
+ rc = 1;
+ case ibft_tgt_name:
+ if (tgt->tgt_name_len)
+ rc = 1;
+ break;
+ case ibft_tgt_chap_name:
+ case ibft_tgt_chap_secret:
+ if (tgt->chap_name_len)
+ rc = 1;
+ break;
+ case ibft_tgt_rev_chap_name:
+ case ibft_tgt_rev_chap_secret:
+ if (tgt->rev_chap_name_len)
+ rc = 1;
+ break;
+ default:
+ break;
+ }
+
+ return rc;
+}
+
+static int ibft_check_initiator_for(struct ibft_initiator *init, int entry)
+{
+ int rc = 0;
+
+ switch (entry) {
+ case ibft_init_index:
+ case ibft_init_flags:
+ rc = 1;
+ break;
+ case ibft_init_isns_server:
+ if (memcmp(init->isns_server, nulls,
+ sizeof(init->isns_server)))
+ rc = 1;
+ break;
+ case ibft_init_slp_server:
+ if (memcmp(init->slp_server, nulls,
+ sizeof(init->slp_server)))
+ rc = 1;
+ break;
+ case ibft_init_pri_radius_server:
+ if (memcmp(init->pri_radius_server, nulls,
+ sizeof(init->pri_radius_server)))
+ rc = 1;
+ break;
+ case ibft_init_sec_radius_server:
+ if (memcmp(init->sec_radius_server, nulls,
+ sizeof(init->sec_radius_server)))
+ rc = 1;
+ break;
+ case ibft_init_initiator_name:
+ if (init->initiator_name_len)
+ rc = 1;
+ break;
+ default:
+ break;
+ }
+
+ return rc;
+}
+
+/*
+ * Register the attributes for all of the kobjects.
+ */
+static int ibft_register_attributes(struct list_head *kobject_list,
+ struct list_head *attr_list)
+{
+ int rc = 0, i = 0;
+ struct ibft_kobject *data = NULL;
+ struct ibft_attribute *attr = NULL, *m;
+
+ list_for_each_entry(data, kobject_list, node) {
+ switch (data->hdr->id) {
+ case id_nic:
+ for (i = 0; i < ibft_eth_end_marker && !rc; i++)
+ if (ibft_check_nic_for(data->nic, i))
+ rc = ibft_create_attribute(data, i,
+ ibft_eth_properties[i],
+ ibft_attr_show_nic, attr_list);
+ break;
+ case id_target:
+ for (i = 0; i < ibft_tgt_end_marker && !rc; i++)
+ if (ibft_check_tgt_for(data->tgt, i))
+ rc = ibft_create_attribute(data, i,
+ ibft_tgt_properties[i],
+ ibft_attr_show_target,
+ attr_list);
+ break;
+ case id_initiator:
+ for (i = 0; i < ibft_init_end_marker && !rc; i++)
+ if (ibft_check_initiator_for(
+ data->initiator, i))
+ rc = ibft_create_attribute(data, i,
+ ibft_initiator_properties[i],
+ ibft_attr_show_initiator,
+ attr_list);
+ break;
+ default:
+ break;
+ }
+ if (rc)
+ break;
+ }
+ list_for_each_entry_safe(attr, m, attr_list, node) {
+ rc = sysfs_create_file(attr->kobj, &attr->attr);
+ if (rc) {
+ list_del(&attr->node);
+ kfree(attr);
+ break;
+ }
+ }
+
+ return rc;
+}
+
+static void ibft_unregister_attributes(struct list_head *list)
+{
+ struct ibft_attribute *attr = NULL, *m;
+
+ list_for_each_entry_safe(attr, m, list, node) {
+ sysfs_remove_file(attr->kobj, &attr->attr);
+ list_del(&attr->node);
+ kfree(attr);
+ }
+ list_del_init(list);
+}
+
+/*
+ * ibft_init() - creates sysfs tree entries for iBFT data.
+ */
+static int __init ibft_init(void)
+{
+ int rc = 0;
+
+ if (!ibft_phys)
+ find_ibft();
+
+ ibft_kset = kset_create_and_add("ibft", NULL, firmware_kobj);
+ if (!ibft_kset)
+ return -ENOMEM;
+
+ if (ibft_phys) {
+ printk(KERN_INFO "iBFT detected at 0x%lx.\n",
+ (unsigned long)ibft_phys);
+
+ rc = ibft_alloc_device(ibft_phys);
+ if (rc)
+ goto out_firmware_unregister;
+
+ /* Scan the IBFT for data and register kobjects. */
+ rc = ibft_register_kobjects(ibft_device, &ibft_kobject_list);
+ if (rc)
+ goto out_free;
+
+ /* Register the attributes */
+ rc = ibft_register_attributes(&ibft_kobject_list,
+ &ibft_attr_list);
+ if (rc)
+ goto out_free;
+ } else
+ printk(KERN_INFO "No iBFT detected.\n");
+
+ return 0;
+
+out_free:
+ ibft_unregister_attributes(&ibft_attr_list);
+ ibft_unregister_kobjects(&ibft_kobject_list);
+ ibft_free_device(ibft_device);
+out_firmware_unregister:
+ kset_unregister(ibft_kset);
+ return rc;
+}
+
+static void __exit ibft_exit(void)
+{
+ ibft_unregister_attributes(&ibft_attr_list);
+ ibft_unregister_kobjects(&ibft_kobject_list);
+ ibft_free_device(ibft_device);
+ kset_unregister(ibft_kset);
+}
+
+module_init(ibft_init);
+module_exit(ibft_exit);
diff --git a/drivers/firmware/iscsi_ibft_find.c b/drivers/firmware/iscsi_ibft_find.c
new file mode 100644
index 0000000..e026e5f
--- /dev/null
+++ b/drivers/firmware/iscsi_ibft_find.c
@@ -0,0 +1,78 @@
+/*
+ * Copyright 2007 Red Hat, Inc.
+ * by Peter Jones <pjones@redhat.com>
+ * Copyright 2007 IBM, Inc.
+ * by Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
+ *
+ * This code finds the iSCSI Boot Format Table.
+ *
+ * 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.
+ */
+
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/ctype.h>
+#include <linux/init.h>
+#include <linux/stat.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/limits.h>
+#include <linux/device.h>
+#include <linux/pci.h>
+#include <linux/blkdev.h>
+#include <linux/iscsi_ibft.h>
+
+
+/*
+ * Physical location of iSCSI Boot Format Table.
+ */
+void *ibft_phys;
+EXPORT_SYMBOL(ibft_phys);
+
+#define IBFT_SIGN "iBFT"
+#define IBFT_SIGN_LEN 4
+#define IBFT_START 0x80000 /* 512kB */
+#define IBFT_END 0x100000 /* 1MB */
+#define VGA_MEM 0xA0000 /* VGA buffer */
+#define VGA_SIZE 0x20000 /* 128kB */
+
+
+/*
+ * Routine used to find the iSCSI Boot Format Table. the physical
+ * location is set in the ibft_phys variable. The return value is
+ * the size of IBFT.
+ */
+ssize_t find_ibft(void)
+{
+ unsigned long pos;
+
+ for (pos = IBFT_START; pos < IBFT_END; pos += 16) {
+ void *virt;
+ /* The table can't be inside the VGA BIOS reserved space,
+ * so skip that area */
+ if (pos == VGA_MEM)
+ pos += VGA_SIZE;
+ virt = phys_to_virt(pos);
+ if (memcmp(virt, IBFT_SIGN, IBFT_SIGN_LEN) == 0) {
+ unsigned long *addr =
+ (unsigned long *)phys_to_virt(pos + 4);
+ unsigned int len = *addr;
+ /* if the length of the table extends past 1M,
+ * the table cannot be valid. */
+ if (pos + len <= (IBFT_END-1)) {
+ ibft_phys = (void *)pos;
+ return len;
+ }
+ }
+ }
+ return 0;
+}
+EXPORT_SYMBOL(find_ibft);
diff --git a/include/linux/iscsi_ibft.h b/include/linux/iscsi_ibft.h
new file mode 100644
index 0000000..cc71c40
--- /dev/null
+++ b/include/linux/iscsi_ibft.h
@@ -0,0 +1,144 @@
+/*
+ * Copyright 2007 Red Hat, Inc.
+ * by Peter Jones <pjones@redhat.com>
+ * Copyright 2007 IBM, Inc.
+ * by Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
+ *
+ * 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.
+ */
+
+#ifndef ISCSI_IBFT_H
+#define ISCSI_IBFT_H
+
+/*
+ * Physical location of iSCSI Boot Format Table.
+ */
+extern void *ibft_phys;
+
+/*
+ * Routine used to find the iSCSI Boot Format Table. The physical
+ * location is set in the ibft_phys variable. The return value is the
+ * size of IBFT.
+ */
+extern ssize_t find_ibft(void);
+
+#if defined(CONFIG_ISCSI_IBFT) || defined(CONFIG_ISCSI_IBFT_MODULE)
+
+struct ibft_table_header {
+ char signature[4];
+ u32 length;
+ u8 revision;
+ u8 checksum;
+ char oem_id[6];
+ char oem_table_id[8];
+ char reserved[24];
+} __attribute__((__packed__));
+
+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 and attribute structures.
+ */
+
+struct ibft_kobject {
+ struct ibft_table_header *header;
+ union {
+ struct ibft_initiator *initiator;
+ struct ibft_nic *nic;
+ struct ibft_tgt *tgt;
+ struct ibft_hdr *hdr;
+ };
+ struct kobject kobj;
+ struct list_head node;
+};
+
+struct ibft_attribute {
+ struct attribute attr;
+ ssize_t (*show) (struct ibft_kobject *entry,
+ struct ibft_attribute *attr, char *buf);
+ union {
+ struct ibft_initiator *initiator;
+ struct ibft_nic *nic;
+ struct ibft_tgt *tgt;
+ struct ibft_hdr *hdr;
+ };
+ struct kobject *kobj;
+ int type; /* The enum of the type. This can be any value off:
+ ibft_eth_properties_enum, ibft_tgt_properties_enum,
+ or ibft_initiator_properties_enum. */
+ struct list_head node;
+};
+
+#endif
+
+#endif /* ISCSI_IBFT_H */
^ permalink raw reply [flat|nested] 2+ messages in thread* Re: [PATCH] Add iSCSI IBFT support (v0.4.2)
2007-12-05 19:47 ` [PATCH] Add iSCSI IBFT support (v0.4.2) Konrad Rzeszutek
@ 2007-12-21 20:05 ` Greg KH
2007-12-21 21:01 ` [PATCH] Add iSCSI IBFT support (v0.4.3) Konrad Rzeszutek
0 siblings, 1 reply; 2+ messages in thread
From: Greg KH @ 2007-12-21 20:05 UTC (permalink / raw)
To: Konrad Rzeszutek
Cc: Doug Maxey, darnok, linux-kernel, pjones, konradr, konradr,
randy.dunlap, hpa, lenb, mike.anderson, dwm, Arjan van de Ven
On Wed, Dec 05, 2007 at 03:47:08PM -0400, Konrad Rzeszutek wrote:
> On Tue, Dec 04, 2007 at 09:12:11PM -0600, Doug Maxey wrote:
> > Overall, looks nice. Good work.
>
> Thank you.
>
> >
> > comments inline below...
> >
> > On Tue, 04 Dec 2007 20:44:19 -0400, darnok@68k.org wrote:
> > > On Wed, Nov 28, 2007 at 07:34:22PM -0400, Konrad Rzeszutek wrote:
> > > >
> > > > This patch adds /sysfs/firmware/ibft/[initiator|targetX|ethernetX]
> > > > directories along with text properties which export the the iSCSI Boot
> > > > Firmware Table (iBFT) structure.
> > > >
> > > > What is iSCSI Boot Firmware Table? It is a mechanism for the iSCSI
> > > > tools to extract from the machine NICs the iSCSI connection information
> > > > so that they can automagically mount the iSCSI share/target. Currently
> > > > the iSCSI information is hard-coded in the initrd.
> > > >
> > > > For full details of the IBFT structure please take a look at:
> > > > ftp://ftp.software.ibm.com/systems/support/system_x_pdf/ibm_iscsi_boot_firmware_table_v1.02.pdf
> > >
> > > Here is an updated version which provides an attribute symlink (in the
> > > ethernetX directory) called 'device' to the NIC device, instead of
> > > exporting a 'pci_bdf' file which had the "bus:slot:func" values.
> > >
> > > Review would be much appreciated.
>
> This next version (0.4.2) includes: much better error unrolling
> when kobject registration fails, fixes from Doug's review, and uses the
> 'kset_create_and_add' API that Greg KH posted. It has been tested on
> todays 2.6.24-rc4-gkh tree.
Looks much nicer, good job.
However I changed the kobject api again, so some minor changes will need
to happen (kobject_init() and kobject_add() parameters have changed),
and you don't need to call kobject_del() right before kobject_put().
Hm, that last one was always true, so that wasn't needed before...
Do you want me to add this to my driver/ tree and fix up the kobject
issues there so it all builds properly, and it gets sent to Linus for
2.6.25?
thanks,
greg k-h
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [PATCH] Add iSCSI IBFT support (v0.4.3)
2007-12-21 20:05 ` Greg KH
@ 2007-12-21 21:01 ` Konrad Rzeszutek
0 siblings, 0 replies; 2+ messages in thread
From: Konrad Rzeszutek @ 2007-12-21 21:01 UTC (permalink / raw)
To: Greg KH
Cc: Doug Maxey, darnok, linux-kernel, pjones, konradr, konradr,
randy.dunlap, hpa, lenb, mike.anderson, dwm, Arjan van de Ven
> > > > > This patch adds /sysfs/firmware/ibft/[initiator|targetX|ethernetX]
> > > > > directories along with text properties which export the the iSCSI Boot
> > > > > Firmware Table (iBFT) structure.
> > > > >
> > > > > What is iSCSI Boot Firmware Table? It is a mechanism for the iSCSI
> > > > > tools to extract from the machine NICs the iSCSI connection information
> > > > > so that they can automagically mount the iSCSI share/target. Currently
> > > > > the iSCSI information is hard-coded in the initrd.
> > > > >
> > > > > For full details of the IBFT structure please take a look at:
> > > > > ftp://ftp.software.ibm.com/systems/support/system_x_pdf/ibm_iscsi_boot_firmware_table_v1.02.pdf
> > > >
> > > > Here is an updated version which provides an attribute symlink (in the
> > > > ethernetX directory) called 'device' to the NIC device, instead of
> > > > exporting a 'pci_bdf' file which had the "bus:slot:func" values.
> > > >
> > > > Review would be much appreciated.
> >
> > This next version (0.4.2) includes: much better error unrolling
> > when kobject registration fails, fixes from Doug's review, and uses the
> > 'kset_create_and_add' API that Greg KH posted. It has been tested on
> > todays 2.6.24-rc4-gkh tree.
>
> Looks much nicer, good job.
Thank you.
>
> However I changed the kobject api again, so some minor changes will need
> to happen (kobject_init() and kobject_add() parameters have changed),
> and you don't need to call kobject_del() right before kobject_put().
> Hm, that last one was always true, so that wasn't needed before...
>
> Do you want me to add this to my driver/ tree and fix up the kobject
> issues there so it all builds properly, and it gets sent to Linus for
> 2.6.25?
Yes please. Albeit I've made changes to it to accommodate your
newest set of patches. It is using kobject_init_and_add and
making the error unrolling match the other changed drivers. I've
tested it with your tree (yesterday) and had no trouble.
Here it is:
Signed-off-by: Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
diff --git a/Documentation/ABI/testing/sysfs-ibft b/Documentation/ABI/testing/sysfs-ibft
new file mode 100644
index 0000000..4898740
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-ibft
@@ -0,0 +1,31 @@
+What: /sys/firmware/ibft/initiator
+Date: November 2007
+Contact: Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
+Description: The /sys/firmware/ibft/initiator directory will contain
+ files that expose the iSCSI Boot Firmware Table initiator data.
+ Usually this contains the Initiator name.
+
+What: /sys/firmware/ibft/targetX
+Date: November 2007
+Contact: Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
+Description: The /sys/firmware/ibft/targetX directory will contain
+ files that expose the iSCSI Boot Firmware Table target data.
+ Usually this contains the target's IP address, boot LUN,
+ target name, and what NIC it is associated with. It can also
+ contain the CHAP name (and password), the reverse CHAP
+ name (and password)
+
+What: /sys/firmware/ibft/ethernetX
+Date: November 2007
+Contact: Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
+Description: The /sys/firmware/ibft/ethernetX directory will contain
+ files that expose the iSCSI Boot Firmware Table NIC data.
+ This can this can the IP address, MAC, and gateway of the NIC.
+
+What: /sys/firmware/ibft/extensionX
+Date: November 2007
+Contact: Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
+Description: The /sys/firmware/ibft/extensionX directory will contain
+ files that expose the iSCSI Boot Firmware Table extension data.
+ The extended data structure is not supported so there would be
+ no files in this directory.
diff --git a/arch/x86/kernel/setup_32.c b/arch/x86/kernel/setup_32.c
index e1e18c3..32900df 100644
--- a/arch/x86/kernel/setup_32.c
+++ b/arch/x86/kernel/setup_32.c
@@ -39,6 +39,7 @@ #include <linux/module.h>
#include <linux/efi.h>
#include <linux/init.h>
#include <linux/edd.h>
+#include <linux/iscsi_ibft.h>
#include <linux/nodemask.h>
#include <linux/kexec.h>
#include <linux/crash_dump.h>
@@ -148,6 +149,20 @@ static inline void copy_edd(void)
}
#endif
+#if defined(CONFIG_ISCSI_IBFT_FIND)
+static void __init reserve_ibft_region(void)
+{
+ unsigned int ibft_len;
+
+ ibft_len = find_ibft();
+ if (ibft_len)
+ reserve_bootmem((unsigned int)ibft_phys,
+ PAGE_ALIGN(ibft_len));
+}
+#else
+static void __init reserve_ibft_region(void) { }
+#endif
+
int __initdata user_defined_memmap = 0;
/*
@@ -496,6 +511,8 @@ #ifdef CONFIG_BLK_DEV_INITRD
}
#endif
reserve_crashkernel();
+
+ reserve_ibft_region();
}
/*
diff --git a/arch/x86/kernel/setup_64.c b/arch/x86/kernel/setup_64.c
index 30d94d1..307fb99 100644
--- a/arch/x86/kernel/setup_64.c
+++ b/arch/x86/kernel/setup_64.c
@@ -33,6 +33,7 @@ #include <linux/pci.h>
#include <linux/acpi.h>
#include <linux/kallsyms.h>
#include <linux/edd.h>
+#include <linux/iscsi_ibft.h>
#include <linux/mmzone.h>
#include <linux/kexec.h>
#include <linux/cpufreq.h>
@@ -198,6 +199,20 @@ static inline void copy_edd(void)
}
#endif
+#if defined(CONFIG_ISCSI_IBFT_FIND)
+static void __init reserve_ibft_region(void)
+{
+ unsigned int ibft_len;
+
+ ibft_len = find_ibft();
+ if (ibft_len)
+ reserve_bootmem_generic((unsigned long)ibft_phys,
+ PAGE_ALIGN(ibft_len));
+}
+#else
+static void __init reserve_ibft_region(void) { }
+#endif
+
#ifdef CONFIG_KEXEC
static void __init reserve_crashkernel(void)
{
@@ -403,6 +418,9 @@ #ifdef CONFIG_BLK_DEV_INITRD
}
#endif
reserve_crashkernel();
+
+ reserve_ibft_region();
+
paging_init();
#ifdef CONFIG_PCI
diff --git a/drivers/firmware/Kconfig b/drivers/firmware/Kconfig
index 05f02a3..e2f7208 100644
--- a/drivers/firmware/Kconfig
+++ b/drivers/firmware/Kconfig
@@ -93,4 +93,23 @@ config DMIID
information from userspace through /sys/class/dmi/id/ or if you want
DMI-based module auto-loading.
+config ISCSI_IBFT_FIND
+ bool "iSCSI Boot Firmware Table Attributes"
+ default n
+ help
+ This option enables the kernel to find the region of memory
+ in which the ISCSI Boot Firmware Table (iBFT) resides. This
+ is necessary for iSCSI Boot Firmware Table Attributes module to work
+ properly.
+
+config ISCSI_IBFT
+ tristate "iSCSI Boot Firmware Table Attributes module"
+ depends on ISCSI_IBFT_FIND
+ default n
+ help
+ This option enables support for detection and exposing of iSCSI
+ Boot Firmware Table (iBFT) via sysfs to userspace. If you wish to
+ detect iSCSI boot parameters dynamically during system boot, say Y.
+ Otherwise, say N.
+
endmenu
diff --git a/drivers/firmware/Makefile b/drivers/firmware/Makefile
index 8d4ebc8..4c91471 100644
--- a/drivers/firmware/Makefile
+++ b/drivers/firmware/Makefile
@@ -8,3 +8,5 @@ obj-$(CONFIG_EFI_PCDP) += pcdp.o
obj-$(CONFIG_DELL_RBU) += dell_rbu.o
obj-$(CONFIG_DCDBAS) += dcdbas.o
obj-$(CONFIG_DMIID) += dmi-id.o
+obj-$(CONFIG_ISCSI_IBFT_FIND) += iscsi_ibft_find.o
+obj-$(CONFIG_ISCSI_IBFT) += iscsi_ibft.o
diff --git a/drivers/firmware/iscsi_ibft.c b/drivers/firmware/iscsi_ibft.c
new file mode 100644
index 0000000..ccdaf7b
--- /dev/null
+++ b/drivers/firmware/iscsi_ibft.c
@@ -0,0 +1,900 @@
+/*
+ * Copyright 2007 Red Hat, Inc.
+ * by Peter Jones <pjones@redhat.com>
+ * Copyright 2007 IBM, Inc.
+ * by Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
+ *
+ * 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.
+ */
+
+
+#include <linux/blkdev.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>
+
+#define IBFT_ISCSI_VERSION "0.4.3"
+#define IBFT_ISCSI_DATE "2007-Dec-21"
+
+MODULE_AUTHOR("Peter Jones <pjones@redhat.com> and \
+Konrad Rzeszutek <konradr@us.ibm.com>");
+MODULE_DESCRIPTION("sysfs interface to BIOS iBFT information");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(IBFT_ISCSI_VERSION);
+
+
+struct ibft_table_header {
+ char signature[4];
+ u32 length;
+ u8 revision;
+ u8 checksum;
+ char oem_id[6];
+ char oem_table_id[8];
+ char reserved[24];
+} __attribute__((__packed__));
+
+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, /* Should never show up */
+ id_control = 1, /* Ditto */
+ id_initiator = 2,
+ id_nic = 3,
+ id_target = 4,
+ id_extensions, /* We don't support. */
+};
+
+static const char *ibft_id_names[] =
+ {"reserved", "control", "initiator", "ethernet%d",
+ "target%d", "extension%d", NULL};
+
+/*
+ * The text attributes names for each of the kobjects.
+*/
+enum ibft_eth_properties_enum {
+ ibft_eth_index,
+ ibft_eth_flags,
+ ibft_eth_ip_addr,
+ ibft_eth_subnet_mask,
+ ibft_eth_origin,
+ ibft_eth_gateway,
+ ibft_eth_primary_dns,
+ ibft_eth_secondary_dns,
+ ibft_eth_dhcp,
+ ibft_eth_vlan,
+ ibft_eth_mac,
+ /* ibft_eth_pci_bdf - this is replaced by link to the device itself. */
+ ibft_eth_hostname,
+ ibft_eth_end_marker,
+};
+
+static const char *ibft_eth_properties[] =
+ {"index", "flags", "ip-addr", "subnet-mask", "origin", "gateway",
+ "primary-dns", "secondary-dns", "dhcp", "vlan", "mac", "hostname",
+ NULL};
+
+enum ibft_tgt_properties_enum {
+ ibft_tgt_index,
+ ibft_tgt_flags,
+ ibft_tgt_ip_addr,
+ ibft_tgt_port,
+ ibft_tgt_lun,
+ ibft_tgt_chap_type,
+ ibft_tgt_nic_assoc,
+ ibft_tgt_name,
+ ibft_tgt_chap_name,
+ ibft_tgt_chap_secret,
+ ibft_tgt_rev_chap_name,
+ ibft_tgt_rev_chap_secret,
+ ibft_tgt_end_marker,
+};
+
+static const char *ibft_tgt_properties[] =
+ {"index", "flags", "ip-addr", "port", "lun", "chap-type", "nic-assoc",
+ "target-name", "chap-name", "chap-secret", "rev-chap-name",
+ "rev-chap-name-secret", NULL};
+
+enum ibft_initiator_properties_enum {
+ ibft_init_index,
+ ibft_init_flags,
+ ibft_init_isns_server,
+ ibft_init_slp_server,
+ ibft_init_pri_radius_server,
+ ibft_init_sec_radius_server,
+ ibft_init_initiator_name,
+ ibft_init_end_marker,
+};
+
+static const char *ibft_initiator_properties[] =
+ {"index", "flags", "isns-server", "slp-server", "pri-radius-server",
+ "sec-radius-server", "initiator-name", NULL};
+
+/*
+ * The kobject and attribute structures.
+ */
+
+struct ibft_kobject {
+ struct ibft_table_header *header;
+ union {
+ struct ibft_initiator *initiator;
+ struct ibft_nic *nic;
+ struct ibft_tgt *tgt;
+ struct ibft_hdr *hdr;
+ };
+ struct kobject kobj;
+ struct list_head node;
+};
+
+struct ibft_attribute {
+ struct attribute attr;
+ ssize_t (*show) (struct ibft_kobject *entry,
+ struct ibft_attribute *attr, char *buf);
+ union {
+ struct ibft_initiator *initiator;
+ struct ibft_nic *nic;
+ struct ibft_tgt *tgt;
+ struct ibft_hdr *hdr;
+ };
+ struct kobject *kobj;
+ int type; /* The enum of the type. This can be any value off:
+ ibft_eth_properties_enum, ibft_tgt_properties_enum,
+ or ibft_initiator_properties_enum. */
+ struct list_head node;
+};
+
+static LIST_HEAD(ibft_attr_list);
+static LIST_HEAD(ibft_kobject_list);
+
+static const char nulls[16];
+static struct ibft_table_header *ibft_device;
+
+/*
+ * Helper functions to parse data properly.
+ */
+static ssize_t sprintf_ipaddr(char *buf, u8 *ip)
+{
+ 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
+ */
+ return sprintf(buf, "%d.%d.%d.%d\n", ip[12],
+ ip[13], ip[14], ip[15]);
+ } else
+ return 0;
+}
+
+static ssize_t sprintf_string(char *str, int len, char *buf)
+{
+ return sprintf(str, "%.*s\n", len, buf);
+}
+
+/*
+ * Helper function to verify the IBFT header.
+ */
+static int ibft_verify_hdr(struct ibft_hdr *hdr, int id, int length)
+{
+#define IBFT_VERIFY_HDR_FIELD(val, name) \
+ if (hdr->val != val) { \
+ printk(KERN_ERR \
+ "error, in IBFT structure (%s) expected %d but" \
+ " found %d\n", \
+ name, val, hdr->val); \
+ return -ENODEV; \
+ }
+ IBFT_VERIFY_HDR_FIELD(id, "ID");
+ IBFT_VERIFY_HDR_FIELD(length, "Length");
+ return 0;
+}
+
+static void ibft_release(struct kobject *kobj)
+{
+ struct ibft_kobject *ibft =
+ container_of(kobj, struct ibft_kobject, kobj);
+ kfree(ibft);
+}
+
+/*
+ * Routines for reading of the iBFT data in a human readable fashion.
+ */
+ssize_t ibft_attr_show_initiator(struct ibft_kobject *entry,
+ struct ibft_attribute *attr,
+ char *buf)
+{
+ struct ibft_initiator *initiator = entry->initiator;
+ void *ibft_loc = entry->header;
+ char *str = buf;
+
+ if (!initiator)
+ return 0;
+
+ switch (attr->type) {
+ case ibft_init_index:
+ str += sprintf(str, "%d\n", initiator->hdr.index);
+ break;
+ case ibft_init_flags:
+ str += sprintf(str, "%d\n", initiator->hdr.flags);
+ break;
+ case ibft_init_isns_server:
+ str += sprintf_ipaddr(str, initiator->isns_server);
+ break;
+ case ibft_init_slp_server:
+ str += sprintf_ipaddr(str, initiator->slp_server);
+ break;
+ case ibft_init_pri_radius_server:
+ str += sprintf_ipaddr(str, initiator->pri_radius_server);
+ break;
+ case ibft_init_sec_radius_server:
+ str += sprintf_ipaddr(str, initiator->sec_radius_server);
+ break;
+ case ibft_init_initiator_name:
+ str += sprintf_string(str, initiator->initiator_name_len,
+ (char *)ibft_loc +
+ initiator->initiator_name_off);
+ break;
+ default:
+ break;
+ }
+
+ return str - buf;
+}
+
+ssize_t ibft_attr_show_nic(struct ibft_kobject *entry,
+ struct ibft_attribute *attr,
+ char *buf)
+{
+ struct ibft_nic *nic = entry->nic;
+ void *ibft_loc = entry->header;
+ char *str = buf;
+ char *mac;
+ int val;
+
+ if (!nic)
+ return 0;
+
+ switch (attr->type) {
+ case ibft_eth_index:
+ str += sprintf(str, "%d\n", nic->hdr.index);
+ break;
+ case ibft_eth_flags:
+ str += sprintf(str, "%d\n", nic->hdr.flags);
+ break;
+ case ibft_eth_ip_addr:
+ str += sprintf_ipaddr(str, nic->ip_addr);
+ break;
+ case ibft_eth_subnet_mask:
+ val = ~((1 << (32-nic->subnet_mask_prefix))-1);
+ str += sprintf(str, "%d.%d.%d.%d\n",
+ (u8)(val >> 24), (u8)(val >> 16),
+ (u8)(val >> 8), (u8)(val));
+ break;
+ case ibft_eth_origin:
+ str += sprintf(str, "%d\n", nic->origin);
+ break;
+ case ibft_eth_gateway:
+ str += sprintf_ipaddr(str, nic->gateway);
+ break;
+ case ibft_eth_primary_dns:
+ str += sprintf_ipaddr(str, nic->primary_dns);
+ break;
+ case ibft_eth_secondary_dns:
+ str += sprintf_ipaddr(str, nic->secondary_dns);
+ break;
+ case ibft_eth_dhcp:
+ str += sprintf_ipaddr(str, nic->dhcp);
+ break;
+ case ibft_eth_vlan:
+ str += sprintf(str, "%d\n", nic->vlan);
+ break;
+ case ibft_eth_mac:
+ mac = nic->mac;
+ str += sprintf(str, "%02x:%02x:%02x:%02x:%02x:%02x\n",
+ (u8)mac[0], (u8)mac[1], (u8)mac[2],
+ (u8)mac[3], (u8)mac[4], (u8)mac[5]);
+ break;
+ case ibft_eth_hostname:
+ str += sprintf_string(str, nic->hostname_len,
+ (char *)ibft_loc + nic->hostname_off);
+ break;
+ default:
+ break;
+ }
+
+ return str - buf;
+};
+
+ssize_t ibft_attr_show_target(struct ibft_kobject *entry,
+ struct ibft_attribute *attr,
+ char *buf)
+{
+ struct ibft_tgt *tgt = entry->tgt;
+ void *ibft_loc = entry->header;
+ char *str = buf;
+ int i;
+
+ if (!tgt)
+ return 0;
+
+ switch (attr->type) {
+ case ibft_tgt_index:
+ str += sprintf(str, "%d\n", tgt->hdr.index);
+ break;
+ case ibft_tgt_flags:
+ str += sprintf(str, "%d\n", tgt->hdr.flags);
+ break;
+ case ibft_tgt_ip_addr:
+ str += sprintf_ipaddr(str, tgt->ip_addr);
+ break;
+ case ibft_tgt_port:
+ str += sprintf(str, "%d\n", tgt->port);
+ break;
+ case ibft_tgt_lun:
+ for (i = 0; i < 8; i++)
+ str += sprintf(str, "%x", (u8)tgt->lun[i]);
+ str += sprintf(str, "\n");
+ break;
+ case ibft_tgt_nic_assoc:
+ str += sprintf(str, "%d\n", tgt->nic_assoc);
+ break;
+ case ibft_tgt_chap_type:
+ str += sprintf(str, "%d\n", tgt->chap_type);
+ break;
+ case ibft_tgt_name:
+ str += sprintf_string(str, tgt->tgt_name_len,
+ (char *)ibft_loc + tgt->tgt_name_off);
+ break;
+ case ibft_tgt_chap_name:
+ str += sprintf_string(str, tgt->chap_name_len,
+ (char *)ibft_loc + tgt->chap_name_off);
+ break;
+ case ibft_tgt_chap_secret:
+ str += sprintf_string(str, tgt->chap_secret_len,
+ (char *)ibft_loc + tgt->chap_secret_off);
+ break;
+ case ibft_tgt_rev_chap_name:
+ str += sprintf_string(str, tgt->rev_chap_name_len,
+ (char *)ibft_loc +
+ tgt->rev_chap_name_off);
+ break;
+ case ibft_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;
+}
+
+/*
+ * The main routine which allows the user to read the IBFT data.
+ */
+static ssize_t ibft_show_attribute(struct kobject *kobj,
+ struct attribute *attr,
+ char *buf)
+{
+ struct ibft_kobject *dev =
+ container_of(kobj, struct ibft_kobject, kobj);
+ struct ibft_attribute *ibft_attr =
+ container_of(attr, struct ibft_attribute, attr);
+ ssize_t ret = -EIO;
+ char *str = buf;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EACCES;
+
+ if (ibft_attr->show)
+ ret = ibft_attr->show(dev, ibft_attr, str);
+
+ return ret;
+}
+
+static struct sysfs_ops ibft_attr_ops = {
+ .show = ibft_show_attribute,
+};
+
+static struct kobj_type ibft_ktype = {
+ .release = ibft_release,
+ .sysfs_ops = &ibft_attr_ops,
+};
+
+static struct kset *ibft_kset;
+
+static int ibft_alloc_device(void *idev)
+{
+ int len;
+ struct ibft_table_header *hdr;
+
+ if (!idev)
+ return -ENOENT;
+
+ hdr = (struct ibft_table_header *)
+ phys_to_virt((unsigned long)ibft_phys);
+ len = hdr->length;
+
+ ibft_device = kmalloc(len, GFP_KERNEL);
+ if (!ibft_device)
+ return -ENOMEM;
+
+ memcpy(ibft_device, hdr, len);
+
+ return 0;
+}
+
+static void ibft_free_device(struct ibft_table_header *hdr)
+{
+ kfree(hdr);
+}
+
+/*
+ * Helper function for ibft_register_kobjects.
+ */
+static int ibft_create_kobject(struct ibft_table_header *header,
+ struct ibft_hdr *hdr,
+ struct list_head *list)
+{
+ 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(hdr, id_initiator,
+ sizeof(*ibft_kobj->initiator));
+ break;
+ case id_nic:
+ rc = ibft_verify_hdr(hdr, id_nic,
+ sizeof(*ibft_kobj->nic));
+ break;
+ case id_target:
+ rc = ibft_verify_hdr(hdr, id_target,
+ sizeof(*ibft_kobj->tgt));
+ break;
+ default:
+ /* Extension field which we don't support. Ignore it */
+ break;
+ }
+
+ if (rc) {
+ kfree(ibft_kobj);
+ goto out;
+ }
+
+ /* kobject fief. We will let the reference counter do the job
+ of deleting its name if we fail here. */
+ ibft_kobj->kobj.kset = ibft_kset;
+
+ rc = kobject_init_and_add(&ibft_kobj->kobj, &ibft_ktype,
+ NULL, ibft_id_names[hdr->id], hdr->index);
+
+ if (rc) {
+ kfree(ibft_kobj);
+ goto out;
+ }
+
+ kobject_uevent(&ibft_kobj->kobj, KOBJ_ADD);
+
+ if (hdr->id == id_nic) {
+ pci_dev = pci_get_bus_and_slot((nic->pci_bdf & 0xff00) >> 8,
+ (nic->pci_bdf & 0xff));
+ if (pci_dev) {
+ rc = sysfs_create_link(&ibft_kobj->kobj,
+ &pci_dev->dev.kobj, "device");
+ pci_dev_put(pci_dev);
+ }
+ }
+
+ /* Nothing broke so lets add it to the list. */
+ list_add_tail(&ibft_kobj->node, list);
+out:
+ return rc;
+}
+
+/*
+ * Scan the IBFT table structure for the NIC and Target fields. When
+ * found add them on the passed-in list.
+ */
+static int ibft_register_kobjects(struct ibft_table_header *header,
+ struct list_head *list)
+{
+ struct ibft_control *control = NULL;
+ void *ptr, *end;
+ int rc = 0;
+ u16 offset;
+
+ control = (void *)header + sizeof(*header);
+ end = (void *)control + control->hdr.length;
+
+ for (ptr = &control->initiator_off; ptr < end; ptr += sizeof(u16)) {
+ offset = *(u16 *)ptr;
+ if (offset && offset < header->length) {
+ rc = ibft_create_kobject(header,
+ (void *)header + offset,
+ list);
+ if (rc)
+ break;
+ }
+ }
+
+ return rc;
+}
+
+static void ibft_unregister(struct list_head *attr_list,
+ struct list_head *kobj_list)
+{
+ struct ibft_kobject *data = NULL, *n;
+ struct ibft_attribute *attr = NULL, *m;
+
+ list_for_each_entry_safe(attr, m, attr_list, node) {
+ sysfs_remove_file(attr->kobj, &attr->attr);
+ list_del(&attr->node);
+ kfree(attr);
+ };
+ list_del_init(attr_list);
+
+ list_for_each_entry_safe(data, n, kobj_list, node) {
+ list_del(&data->node);
+ if (data->hdr->id == id_nic)
+ sysfs_remove_link(&data->kobj, "device");
+ kobject_unregister(&data->kobj);
+ };
+ list_del_init(kobj_list);
+}
+
+static int ibft_create_attribute(struct ibft_kobject *kobj_data,
+ int type,
+ const char *name,
+ ssize_t (*show) (struct ibft_kobject *entry,
+ struct ibft_attribute *attr,
+ char *buf),
+ struct list_head *list)
+{
+ struct ibft_attribute *attr = NULL;
+ struct ibft_hdr *hdr = kobj_data->hdr;
+
+ attr = kmalloc(sizeof(*attr), GFP_KERNEL);
+ if (!attr)
+ return -ENOMEM;
+
+ attr->attr.name = name;
+ attr->attr.mode = S_IRUSR;
+ attr->attr.owner = THIS_MODULE;
+
+ attr->hdr = hdr;
+ attr->show = show;
+ attr->kobj = &kobj_data->kobj;
+ attr->type = type;
+
+ list_add_tail(&attr->node, list);
+
+ return 0;
+}
+
+static int ibft_check_nic_for(struct ibft_nic *nic, int entry)
+{
+ int rc = 0;
+
+ switch (entry) {
+ case ibft_eth_index:
+ case ibft_eth_flags:
+ rc = 1;
+ break;
+ case ibft_eth_ip_addr:
+ if (!memcmp(nic->dhcp, nulls, sizeof(nic->dhcp)))
+ rc = 1;
+ break;
+ case ibft_eth_subnet_mask:
+ if (!memcmp(nic->dhcp, nulls, sizeof(nic->dhcp)))
+ rc = 1;
+ break;
+ case ibft_eth_origin:
+ rc = 1;
+ break;
+ case ibft_eth_gateway:
+ if (memcmp(nic->gateway, nulls, sizeof(nic->gateway)))
+ rc = 1;
+ break;
+ case ibft_eth_primary_dns:
+ if (memcmp(nic->primary_dns, nulls,
+ sizeof(nic->primary_dns)))
+ rc = 1;
+ break;
+ case ibft_eth_secondary_dns:
+ if (memcmp(nic->secondary_dns, nulls,
+ sizeof(nic->secondary_dns)))
+ rc = 1;
+ break;
+ case ibft_eth_dhcp:
+ if (memcmp(nic->dhcp, nulls, sizeof(nic->dhcp)))
+ rc = 1;
+ break;
+ case ibft_eth_vlan:
+ case ibft_eth_mac:
+ rc = 1;
+ break;
+ case ibft_eth_hostname:
+ if (nic->hostname_off)
+ rc = 1;
+ break;
+ default:
+ break;
+ }
+
+ return rc;
+}
+
+static int ibft_check_tgt_for(struct ibft_tgt *tgt, int entry)
+{
+ int rc = 0;
+
+ switch (entry) {
+ case ibft_tgt_index:
+ case ibft_tgt_flags:
+ case ibft_tgt_ip_addr:
+ case ibft_tgt_port:
+ case ibft_tgt_lun:
+ case ibft_tgt_nic_assoc:
+ case ibft_tgt_chap_type:
+ rc = 1;
+ case ibft_tgt_name:
+ if (tgt->tgt_name_len)
+ rc = 1;
+ break;
+ case ibft_tgt_chap_name:
+ case ibft_tgt_chap_secret:
+ if (tgt->chap_name_len)
+ rc = 1;
+ break;
+ case ibft_tgt_rev_chap_name:
+ case ibft_tgt_rev_chap_secret:
+ if (tgt->rev_chap_name_len)
+ rc = 1;
+ break;
+ default:
+ break;
+ }
+
+ return rc;
+}
+
+static int ibft_check_initiator_for(struct ibft_initiator *init, int entry)
+{
+ int rc = 0;
+
+ switch (entry) {
+ case ibft_init_index:
+ case ibft_init_flags:
+ rc = 1;
+ break;
+ case ibft_init_isns_server:
+ if (memcmp(init->isns_server, nulls,
+ sizeof(init->isns_server)))
+ rc = 1;
+ break;
+ case ibft_init_slp_server:
+ if (memcmp(init->slp_server, nulls,
+ sizeof(init->slp_server)))
+ rc = 1;
+ break;
+ case ibft_init_pri_radius_server:
+ if (memcmp(init->pri_radius_server, nulls,
+ sizeof(init->pri_radius_server)))
+ rc = 1;
+ break;
+ case ibft_init_sec_radius_server:
+ if (memcmp(init->sec_radius_server, nulls,
+ sizeof(init->sec_radius_server)))
+ rc = 1;
+ break;
+ case ibft_init_initiator_name:
+ if (init->initiator_name_len)
+ rc = 1;
+ break;
+ default:
+ break;
+ }
+
+ return rc;
+}
+
+/*
+ * Register the attributes for all of the kobjects.
+ */
+static int ibft_register_attributes(struct list_head *kobject_list,
+ struct list_head *attr_list)
+{
+ int rc = 0, i = 0;
+ struct ibft_kobject *data = NULL;
+ struct ibft_attribute *attr = NULL, *m;
+
+ list_for_each_entry(data, kobject_list, node) {
+ switch (data->hdr->id) {
+ case id_nic:
+ for (i = 0; i < ibft_eth_end_marker && !rc; i++)
+ if (ibft_check_nic_for(data->nic, i))
+ rc = ibft_create_attribute(data, i,
+ ibft_eth_properties[i],
+ ibft_attr_show_nic, attr_list);
+ break;
+ case id_target:
+ for (i = 0; i < ibft_tgt_end_marker && !rc; i++)
+ if (ibft_check_tgt_for(data->tgt, i))
+ rc = ibft_create_attribute(data, i,
+ ibft_tgt_properties[i],
+ ibft_attr_show_target,
+ attr_list);
+ break;
+ case id_initiator:
+ for (i = 0; i < ibft_init_end_marker && !rc; i++)
+ if (ibft_check_initiator_for(
+ data->initiator, i))
+ rc = ibft_create_attribute(data, i,
+ ibft_initiator_properties[i],
+ ibft_attr_show_initiator,
+ attr_list);
+ break;
+ default:
+ break;
+ }
+ if (rc)
+ break;
+ }
+ list_for_each_entry_safe(attr, m, attr_list, node) {
+ rc = sysfs_create_file(attr->kobj, &attr->attr);
+ if (rc) {
+ list_del(&attr->node);
+ kfree(attr);
+ break;
+ }
+ }
+
+ return rc;
+}
+
+/*
+ * ibft_init() - creates sysfs tree entries for iBFT data.
+ */
+static int __init ibft_init(void)
+{
+ int rc = 0;
+
+ if (!ibft_phys)
+ find_ibft();
+
+ ibft_kset = kset_create_and_add("ibft", NULL, firmware_kobj);
+ if (!ibft_kset)
+ return -ENOMEM;
+
+ if (ibft_phys) {
+ printk(KERN_INFO "iBFT detected at 0x%p.\n", ibft_phys);
+
+ rc = ibft_alloc_device(ibft_phys);
+ if (rc)
+ goto out_firmware_unregister;
+
+ /* Scan the IBFT for data and register kobjects. */
+ rc = ibft_register_kobjects(ibft_device, &ibft_kobject_list);
+ if (rc)
+ goto out_free;
+
+ /* Register the attributes */
+ rc = ibft_register_attributes(&ibft_kobject_list,
+ &ibft_attr_list);
+ if (rc)
+ goto out_free;
+ } else
+ printk(KERN_INFO "No iBFT detected.\n");
+
+ return 0;
+
+out_free:
+ ibft_unregister(&ibft_attr_list, &ibft_kobject_list);
+ ibft_free_device(ibft_device);
+out_firmware_unregister:
+ kset_unregister(ibft_kset);
+ return rc;
+}
+
+static void __exit ibft_exit(void)
+{
+ ibft_unregister(&ibft_attr_list, &ibft_kobject_list);
+ ibft_free_device(ibft_device);
+ kset_unregister(ibft_kset);
+}
+
+module_init(ibft_init);
+module_exit(ibft_exit);
diff --git a/drivers/firmware/iscsi_ibft_find.c b/drivers/firmware/iscsi_ibft_find.c
new file mode 100644
index 0000000..d40cc25
--- /dev/null
+++ b/drivers/firmware/iscsi_ibft_find.c
@@ -0,0 +1,77 @@
+/*
+ * Copyright 2007 Red Hat, Inc.
+ * by Peter Jones <pjones@redhat.com>
+ * Copyright 2007 IBM, Inc.
+ * by Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
+ *
+ * This code finds the iSCSI Boot Format Table.
+ *
+ * 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.
+ */
+
+#include <linux/blkdev.h>
+#include <linux/ctype.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/init.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>
+
+
+/*
+ * Physical location of iSCSI Boot Format Table.
+ */
+void *ibft_phys;
+EXPORT_SYMBOL(ibft_phys);
+
+#define IBFT_SIGN "iBFT"
+#define IBFT_SIGN_LEN 4
+#define IBFT_START 0x80000 /* 512kB */
+#define IBFT_END 0x100000 /* 1MB */
+#define VGA_MEM 0xA0000 /* VGA buffer */
+#define VGA_SIZE 0x20000 /* 128kB */
+
+
+/*
+ * Routine used to find the iSCSI Boot Format Table. the physical
+ * location is set in the ibft_phys variable. The return value is
+ * the size of IBFT.
+ */
+ssize_t find_ibft(void)
+{
+ unsigned long pos;
+
+ for (pos = IBFT_START; pos < IBFT_END; pos += 16) {
+ void *virt;
+ /* The table can't be inside the VGA BIOS reserved space,
+ * so skip that area */
+ if (pos == VGA_MEM)
+ pos += VGA_SIZE;
+ virt = phys_to_virt(pos);
+ if (memcmp(virt, IBFT_SIGN, IBFT_SIGN_LEN) == 0) {
+ unsigned long *addr =
+ (unsigned long *)phys_to_virt(pos + 4);
+ unsigned int len = *addr;
+ /* if the length of the table extends past 1M,
+ * the table cannot be valid. */
+ if (pos + len <= (IBFT_END-1)) {
+ ibft_phys = (void *)pos;
+ return len;
+ }
+ }
+ }
+ return 0;
+}
+EXPORT_SYMBOL(find_ibft);
diff --git a/drivers/scsi/libsas/sas_ata.c b/drivers/scsi/libsas/sas_ata.c
diff --git a/include/linux/iscsi_ibft.h b/include/linux/iscsi_ibft.h
new file mode 100644
index 0000000..d36ca16
--- /dev/null
+++ b/include/linux/iscsi_ibft.h
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2007 Red Hat, Inc.
+ * by Peter Jones <pjones@redhat.com>
+ * Copyright 2007 IBM, Inc.
+ * by Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
+ *
+ * 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.
+ */
+
+#ifndef ISCSI_IBFT_H
+#define ISCSI_IBFT_H
+
+#if defined(CONFIG_ISCSI_IBFT_FIND)
+
+/*
+ * Physical location of iSCSI Boot Format Table.
+ */
+extern void *ibft_phys;
+
+/*
+ * Routine used to find the iSCSI Boot Format Table. The physical
+ * location is set in the ibft_phys variable. The return value is the
+ * size of IBFT.
+ */
+extern ssize_t find_ibft(void);
+
+#endif
+
+#endif /* ISCSI_IBFT_H */
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2007-12-22 17:20 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2007-12-22 17:19 [PATCH] Add iSCSI IBFT support (v0.4.3) Konrad Rzeszutek
-- strict thread matches above, loose matches on Subject: below --
2007-11-28 23:34 [REPOST PATCH] Add iSCSI IBFT support (v0.4) Konrad Rzeszutek
2007-12-05 0:44 ` darnok
2007-12-05 3:12 ` Doug Maxey
2007-12-05 19:47 ` [PATCH] Add iSCSI IBFT support (v0.4.2) Konrad Rzeszutek
2007-12-21 20:05 ` Greg KH
2007-12-21 21:01 ` [PATCH] Add iSCSI IBFT support (v0.4.3) Konrad Rzeszutek
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